feat: Add Rename Unit functionality and improve navigation in SLM dashboard

- Implemented a modal for renaming units with validation and confirmation prompts.
- Added JavaScript functions to handle opening, closing, and submitting the rename unit form.
- Enhanced the back navigation in the SLM detail page to check referrer history.
- Updated breadcrumb navigation in the legacy dashboard to accommodate NRL locations.
- Improved the sound level meters page with a more informative header and device list.
- Introduced a live measurement chart with WebSocket support for real-time data streaming.
- Added functionality to manage active devices and projects with auto-refresh capabilities.

backend/main.py

@@ -18,7 +18,7 @@ logging.basicConfig(
 logger = logging.getLogger(__name__)
 
 from backend.database import engine, Base, get_db
-from backend.routers import roster, units, photos, roster_edit, dashboard, dashboard_tabs, activity, slmm, slm_ui, slm_dashboard, seismo_dashboard, projects, project_locations, scheduler
+from backend.routers import roster, units, photos, roster_edit, roster_rename, dashboard, dashboard_tabs, activity, slmm, slm_ui, slm_dashboard, seismo_dashboard, projects, project_locations, scheduler
 from backend.services.snapshot import emit_status_snapshot
 from backend.models import IgnoredUnit
 
@@ -84,6 +84,7 @@ app.include_router(roster.router)
 app.include_router(units.router)
 app.include_router(photos.router)
 app.include_router(roster_edit.router)
+app.include_router(roster_rename.router)
 app.include_router(dashboard.router)
 app.include_router(dashboard_tabs.router)
 app.include_router(activity.router)
@@ -162,6 +163,7 @@ async def slm_legacy_dashboard(
     request: Request,
     unit_id: str,
     from_project: Optional[str] = None,
+    from_nrl: Optional[str] = None,
     db: Session = Depends(get_db)
 ):
     """Legacy SLM control center dashboard for a specific unit"""
@@ -171,11 +173,19 @@ async def slm_legacy_dashboard(
         from backend.models import Project
         project = db.query(Project).filter_by(id=from_project).first()
 
+    # Get NRL location details if from_nrl is provided
+    nrl_location = None
+    if from_nrl:
+        from backend.models import NRLLocation
+        nrl_location = db.query(NRLLocation).filter_by(id=from_nrl).first()
+
     return templates.TemplateResponse("slm_legacy_dashboard.html", {
         "request": request,
         "unit_id": unit_id,
         "from_project": from_project,
-        "project": project
+        "from_nrl": from_nrl,
+        "project": project,
+        "nrl_location": nrl_location
     })
 
 

backend/routers/roster_rename.py

@@ -0,0 +1,139 @@
+"""
+Roster Unit Rename Router
+
+Provides endpoint for safely renaming unit IDs across all database tables.
+"""
+
+from fastapi import APIRouter, Depends, HTTPException, Form
+from sqlalchemy.orm import Session
+from datetime import datetime
+import logging
+
+from backend.database import get_db
+from backend.models import RosterUnit, Emitter, UnitHistory
+from backend.routers.roster_edit import record_history, sync_slm_to_slmm_cache
+
+router = APIRouter(prefix="/api/roster", tags=["roster-rename"])
+logger = logging.getLogger(__name__)
+
+
+@router.post("/rename")
+async def rename_unit(
+    old_id: str = Form(...),
+    new_id: str = Form(...),
+    db: Session = Depends(get_db)
+):
+    """
+    Rename a unit ID across all tables.
+    Updates the unit ID in roster, emitters, unit_history, and all foreign key references.
+
+    IMPORTANT: This operation updates the primary key, which affects all relationships.
+    """
+    # Validate input
+    if not old_id or not new_id:
+        raise HTTPException(status_code=400, detail="Both old_id and new_id are required")
+
+    if old_id == new_id:
+        raise HTTPException(status_code=400, detail="New ID must be different from old ID")
+
+    # Check if old unit exists
+    old_unit = db.query(RosterUnit).filter(RosterUnit.id == old_id).first()
+    if not old_unit:
+        raise HTTPException(status_code=404, detail=f"Unit '{old_id}' not found")
+
+    # Check if new ID already exists
+    existing_unit = db.query(RosterUnit).filter(RosterUnit.id == new_id).first()
+    if existing_unit:
+        raise HTTPException(status_code=409, detail=f"Unit ID '{new_id}' already exists")
+
+    device_type = old_unit.device_type
+
+    try:
+        # Record history for the rename operation (using old_id since that's still valid)
+        record_history(
+            db=db,
+            unit_id=old_id,
+            change_type="id_change",
+            field_name="id",
+            old_value=old_id,
+            new_value=new_id,
+            source="manual",
+            notes=f"Unit renamed from '{old_id}' to '{new_id}'"
+        )
+
+        # Update roster table (primary)
+        old_unit.id = new_id
+        old_unit.last_updated = datetime.utcnow()
+
+        # Update emitters table
+        emitter = db.query(Emitter).filter(Emitter.id == old_id).first()
+        if emitter:
+            emitter.id = new_id
+
+        # Update unit_history table (all entries for this unit)
+        db.query(UnitHistory).filter(UnitHistory.unit_id == old_id).update(
+            {"unit_id": new_id},
+            synchronize_session=False
+        )
+
+        # Update deployed_with_modem_id references (units that reference this as modem)
+        db.query(RosterUnit).filter(RosterUnit.deployed_with_modem_id == old_id).update(
+            {"deployed_with_modem_id": new_id},
+            synchronize_session=False
+        )
+
+        # Update unit_assignments table (if exists)
+        try:
+            from backend.models import UnitAssignment
+            db.query(UnitAssignment).filter(UnitAssignment.unit_id == old_id).update(
+                {"unit_id": new_id},
+                synchronize_session=False
+            )
+        except Exception as e:
+            logger.warning(f"Could not update unit_assignments: {e}")
+
+        # Update recording_sessions table (if exists)
+        try:
+            from backend.models import RecordingSession
+            db.query(RecordingSession).filter(RecordingSession.unit_id == old_id).update(
+                {"unit_id": new_id},
+                synchronize_session=False
+            )
+        except Exception as e:
+            logger.warning(f"Could not update recording_sessions: {e}")
+
+        # Commit all changes
+        db.commit()
+
+        # If sound level meter, sync updated config to SLMM cache
+        if device_type == "sound_level_meter":
+            logger.info(f"Syncing renamed SLM {new_id} (was {old_id}) config to SLMM cache...")
+            result = await sync_slm_to_slmm_cache(
+                unit_id=new_id,
+                host=old_unit.slm_host,
+                tcp_port=old_unit.slm_tcp_port,
+                ftp_port=old_unit.slm_ftp_port,
+                deployed_with_modem_id=old_unit.deployed_with_modem_id,
+                db=db
+            )
+
+            if not result["success"]:
+                logger.warning(f"SLMM cache sync warning for renamed unit {new_id}: {result['message']}")
+
+        logger.info(f"Successfully renamed unit '{old_id}' to '{new_id}'")
+
+        return {
+            "success": True,
+            "message": f"Successfully renamed unit from '{old_id}' to '{new_id}'",
+            "old_id": old_id,
+            "new_id": new_id,
+            "device_type": device_type
+        }
+
+    except Exception as e:
+        db.rollback()
+        logger.error(f"Error renaming unit '{old_id}' to '{new_id}': {e}")
+        raise HTTPException(
+            status_code=500,
+            detail=f"Failed to rename unit: {str(e)}"
+        )

backend/routers/units.py

@@ -5,6 +5,7 @@ from typing import Dict, Any
 
 from backend.database import get_db
 from backend.services.snapshot import emit_status_snapshot
+from backend.models import RosterUnit
 
 router = APIRouter(prefix="/api", tags=["units"])
 
@@ -42,3 +43,32 @@ def get_unit_detail(unit_id: str, db: Session = Depends(get_db)):
         "note": unit_data.get("note", ""),
         "coordinates": coords
     }
+
+
+@router.get("/units/{unit_id}")
+def get_unit_by_id(unit_id: str, db: Session = Depends(get_db)):
+    """
+    Get unit data directly from the roster (for settings/configuration).
+    """
+    unit = db.query(RosterUnit).filter_by(id=unit_id).first()
+
+    if not unit:
+        raise HTTPException(status_code=404, detail=f"Unit {unit_id} not found")
+
+    return {
+        "id": unit.id,
+        "unit_type": unit.unit_type,
+        "device_type": unit.device_type,
+        "deployed": unit.deployed,
+        "retired": unit.retired,
+        "note": unit.note,
+        "location": unit.location,
+        "address": unit.address,
+        "coordinates": unit.coordinates,
+        "slm_host": unit.slm_host,
+        "slm_tcp_port": unit.slm_tcp_port,
+        "slm_ftp_port": unit.slm_ftp_port,
+        "slm_model": unit.slm_model,
+        "slm_serial_number": unit.slm_serial_number,
+        "deployed_with_modem_id": unit.deployed_with_modem_id
+    }

docker-compose.yml

@@ -11,10 +11,12 @@ services:
     environment:
       - PYTHONUNBUFFERED=1
       - ENVIRONMENT=production
-      - SLMM_BASE_URL=http://slmm:8100
+      - SLMM_BASE_URL=http://host.docker.internal:8100
     restart: unless-stopped
     depends_on:
       - slmm
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8001/health"]
       interval: 30s
@@ -50,8 +52,7 @@ services:
       context: ../slmm
       dockerfile: Dockerfile
     container_name: slmm
-    ports:
+    network_mode: host
-      - "8100:8100"
     volumes:
       - ../slmm/data:/app/data
     environment:

rename_unit.py

@@ -0,0 +1,138 @@
+#!/usr/bin/env python3
+"""
+Script to rename a unit ID in the database.
+This updates the unit across all tables with proper foreign key handling.
+"""
+
+import sys
+from sqlalchemy import create_engine, text
+from sqlalchemy.orm import sessionmaker
+
+DATABASE_URL = "sqlite:///data/sfm.db"
+
+def rename_unit(old_id: str, new_id: str):
+    """
+    Rename a unit ID across all relevant tables.
+
+    Args:
+        old_id: Current unit ID (e.g., "SLM4301")
+        new_id: New unit ID (e.g., "SLM-43-01")
+    """
+    engine = create_engine(DATABASE_URL)
+    Session = sessionmaker(bind=engine)
+    session = Session()
+
+    try:
+        # Check if old unit exists
+        result = session.execute(
+            text("SELECT id, device_type FROM roster WHERE id = :old_id"),
+            {"old_id": old_id}
+        ).fetchone()
+
+        if not result:
+            print(f"❌ Error: Unit '{old_id}' not found in roster")
+            return False
+
+        device_type = result[1]
+        print(f"✓ Found unit '{old_id}' (device_type: {device_type})")
+
+        # Check if new ID already exists
+        result = session.execute(
+            text("SELECT id FROM roster WHERE id = :new_id"),
+            {"new_id": new_id}
+        ).fetchone()
+
+        if result:
+            print(f"❌ Error: Unit ID '{new_id}' already exists")
+            return False
+
+        print(f"\n🔄 Renaming '{old_id}' → '{new_id}'...\n")
+
+        # Update roster table (primary)
+        session.execute(
+            text("UPDATE roster SET id = :new_id WHERE id = :old_id"),
+            {"new_id": new_id, "old_id": old_id}
+        )
+        print(f"  ✓ Updated roster")
+
+        # Update emitters table
+        result = session.execute(
+            text("UPDATE emitters SET id = :new_id WHERE id = :old_id"),
+            {"new_id": new_id, "old_id": old_id}
+        )
+        if result.rowcount > 0:
+            print(f"  ✓ Updated emitters ({result.rowcount} rows)")
+
+        # Update unit_history table
+        result = session.execute(
+            text("UPDATE unit_history SET unit_id = :new_id WHERE unit_id = :old_id"),
+            {"new_id": new_id, "old_id": old_id}
+        )
+        if result.rowcount > 0:
+            print(f"  ✓ Updated unit_history ({result.rowcount} rows)")
+
+        # Update deployed_with_modem_id references
+        result = session.execute(
+            text("UPDATE roster SET deployed_with_modem_id = :new_id WHERE deployed_with_modem_id = :old_id"),
+            {"new_id": new_id, "old_id": old_id}
+        )
+        if result.rowcount > 0:
+            print(f"  ✓ Updated modem references ({result.rowcount} rows)")
+
+        # Update unit_assignments table (if exists)
+        try:
+            result = session.execute(
+                text("UPDATE unit_assignments SET unit_id = :new_id WHERE unit_id = :old_id"),
+                {"new_id": new_id, "old_id": old_id}
+            )
+            if result.rowcount > 0:
+                print(f"  ✓ Updated unit_assignments ({result.rowcount} rows)")
+        except Exception:
+            pass  # Table may not exist
+
+        # Update recording_sessions table (if exists)
+        try:
+            result = session.execute(
+                text("UPDATE recording_sessions SET unit_id = :new_id WHERE unit_id = :old_id"),
+                {"new_id": new_id, "old_id": old_id}
+            )
+            if result.rowcount > 0:
+                print(f"  ✓ Updated recording_sessions ({result.rowcount} rows)")
+        except Exception:
+            pass  # Table may not exist
+
+        # Commit all changes
+        session.commit()
+        print(f"\n✅ Successfully renamed unit '{old_id}' to '{new_id}'")
+        return True
+
+    except Exception as e:
+        session.rollback()
+        print(f"\n❌ Error during rename: {e}")
+        return False
+    finally:
+        session.close()
+
+
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print("Usage: python rename_unit.py <old_id> <new_id>")
+        print("Example: python rename_unit.py SLM4301 SLM-43-01")
+        sys.exit(1)
+
+    old_id = sys.argv[1]
+    new_id = sys.argv[2]
+
+    print(f"Unit Renaming Tool")
+    print(f"=" * 50)
+    print(f"Old ID: {old_id}")
+    print(f"New ID: {new_id}")
+    print(f"=" * 50)
+
+    confirm = input(f"\nAre you sure you want to rename '{old_id}' to '{new_id}'? (yes/no): ")
+    if confirm.lower() != 'yes':
+        print("❌ Rename cancelled")
+        sys.exit(0)
+
+    success = rename_unit(old_id, new_id)
+    sys.exit(0 if success else 1)

templates/nrl_detail.html

@@ -136,7 +136,7 @@
                     <div>
                         <div class="text-sm text-gray-600 dark:text-gray-400">Assigned Unit</div>
                         <div class="text-lg font-medium text-gray-900 dark:text-white">
-                            <a href="/slm/{{ assigned_unit.id }}" class="text-seismo-orange hover:text-seismo-navy">
+                            <a href="/slm/{{ assigned_unit.id }}?from_project={{ project_id }}&from_nrl={{ location_id }}" class="text-seismo-orange hover:text-seismo-navy">
                                 {{ assigned_unit.id }}
                             </a>
                         </div>

templates/partials/slm_device_list.html

@@ -1,17 +1,28 @@
 <!-- SLM Device List -->
 {% if units %}
     {% for unit in units %}
-    <a href="/slm/{{ unit.id }}" class="block bg-gray-50 dark:bg-gray-800 rounded-lg p-4 border border-transparent hover:border-seismo-orange transition-colors relative">
+    <div class="bg-gray-50 dark:bg-gray-800 rounded-lg p-4 border border-transparent hover:border-seismo-orange transition-colors relative">
+        <div class="absolute top-3 right-3 flex gap-2">
+            <button onclick="event.preventDefault(); event.stopPropagation(); showLiveChart('{{ unit.id }}');"
+                    class="text-gray-500 hover:text-seismo-orange dark:text-gray-400 dark:hover:text-seismo-orange"
+                    title="View live chart">
+                <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 19v-6a2 2 0 00-2-2H5a2 2 0 00-2 2v6a2 2 0 002 2h2a2 2 0 002-2zm0 0V9a2 2 0 012-2h2a2 2 0 012 2v10m-6 0a2 2 0 002 2h2a2 2 0 002-2m0 0V5a2 2 0 012-2h2a2 2 0 012 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z"></path>
+                </svg>
+            </button>
             <button onclick="event.preventDefault(); event.stopPropagation(); openDeviceConfigModal('{{ unit.id }}');"
-                class="absolute top-3 right-3 text-gray-500 hover:text-seismo-orange dark:text-gray-400 dark:hover:text-seismo-orange"
+                    class="text-gray-500 hover:text-seismo-orange dark:text-gray-400 dark:hover:text-seismo-orange"
                     title="Configure {{ unit.id }}">
                 <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                     <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z"></path>
                     <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z"></path>
                 </svg>
             </button>
+        </div>
+
+        <a href="/slm/{{ unit.id }}" class="block">
             <div class="flex items-start justify-between gap-4">
-            <div class="min-w-0">
+                <div class="min-w-0 flex-1">
                     <div class="flex items-center gap-2">
                         <span class="font-semibold text-gray-900 dark:text-white">{{ unit.id }}</span>
                         {% if unit.slm_model %}
@@ -46,6 +57,7 @@
                 {% endif %}
             </div>
         </a>
+    </div>
     {% endfor %}
 {% else %}
     <div class="text-center py-8 text-gray-500 dark:text-gray-400">

templates/partials/slm_live_view.html

@@ -23,6 +23,27 @@
             {% endif %}
         </div>
 
+        <!-- Status and Actions -->
+        <div class="flex items-center gap-3">
+            <!-- Settings Gear -->
+            <button onclick="openSettingsModal('{{ unit.id }}')"
+                    class="p-2 text-gray-600 dark:text-gray-400 hover:text-seismo-orange dark:hover:text-seismo-orange rounded-lg hover:bg-gray-100 dark:hover:bg-gray-700 transition-colors"
+                    title="Unit Settings">
+                <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z"></path>
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z"></path>
+                </svg>
+            </button>
+
+            <!-- FTP Browser -->
+            <button onclick="openFTPBrowser('{{ unit.id }}')"
+                    class="p-2 text-gray-600 dark:text-gray-400 hover:text-seismo-orange dark:hover:text-seismo-orange rounded-lg hover:bg-gray-100 dark:hover:bg-gray-700 transition-colors"
+                    title="Browse Files (FTP)">
+                <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z"></path>
+                </svg>
+            </button>
+
             <!-- Measurement Status Badge -->
             <div>
                 {% if is_measuring %}
@@ -37,6 +58,7 @@
                 {% endif %}
             </div>
         </div>
+    </div>
 
     <!-- Control Buttons -->
     <div class="flex gap-2 mb-6">
@@ -564,4 +586,864 @@ window.addEventListener('beforeunload', function() {
         window.currentWebSocket.close();
     }
 });
+
+// ========================================
+// Settings Modal
+// ========================================
+async function openSettingsModal(unitId) {
+    const modal = document.getElementById('settings-modal');
+    const errorDiv = document.getElementById('settings-error');
+    const successDiv = document.getElementById('settings-success');
+
+    // Clear previous messages
+    errorDiv.classList.add('hidden');
+    successDiv.classList.add('hidden');
+
+    // Store unit ID
+    document.getElementById('settings-unit-id').value = unitId;
+
+    // Load current SLMM config
+    try {
+        const response = await fetch(`/api/slmm/${unitId}/config`);
+        if (!response.ok) {
+            throw new Error('Failed to load configuration');
+        }
+
+        const result = await response.json();
+        const config = result.data || {};
+
+        // Populate form fields
+        document.getElementById('settings-host').value = config.host || '';
+        document.getElementById('settings-tcp-port').value = config.tcp_port || 2255;
+        document.getElementById('settings-ftp-port').value = config.ftp_port || 21;
+        document.getElementById('settings-ftp-username').value = config.ftp_username || '';
+        document.getElementById('settings-ftp-password').value = config.ftp_password || '';
+        document.getElementById('settings-tcp-enabled').checked = config.tcp_enabled !== false;
+        document.getElementById('settings-ftp-enabled').checked = config.ftp_enabled === true;
+        document.getElementById('settings-web-enabled').checked = config.web_enabled === true;
+
+        modal.classList.remove('hidden');
+    } catch (error) {
+        console.error('Failed to load SLMM config:', error);
+        errorDiv.textContent = 'Failed to load configuration: ' + error.message;
+        errorDiv.classList.remove('hidden');
+        modal.classList.remove('hidden');
+    }
+}
+
+function closeSettingsModal() {
+    document.getElementById('settings-modal').classList.add('hidden');
+}
+
+document.getElementById('settings-form').addEventListener('submit', async function(e) {
+    e.preventDefault();
+
+    const unitId = document.getElementById('settings-unit-id').value;
+    const errorDiv = document.getElementById('settings-error');
+    const successDiv = document.getElementById('settings-success');
+
+    errorDiv.classList.add('hidden');
+    successDiv.classList.add('hidden');
+
+    // Gather form data
+    const configData = {
+        host: document.getElementById('settings-host').value.trim(),
+        tcp_port: parseInt(document.getElementById('settings-tcp-port').value),
+        ftp_port: parseInt(document.getElementById('settings-ftp-port').value),
+        ftp_username: document.getElementById('settings-ftp-username').value.trim() || null,
+        ftp_password: document.getElementById('settings-ftp-password').value || null,
+        tcp_enabled: document.getElementById('settings-tcp-enabled').checked,
+        ftp_enabled: document.getElementById('settings-ftp-enabled').checked,
+        web_enabled: document.getElementById('settings-web-enabled').checked
+    };
+
+    // Validation
+    if (!configData.host) {
+        errorDiv.textContent = 'Host/IP address is required';
+        errorDiv.classList.remove('hidden');
+        return;
+    }
+
+    if (configData.tcp_port < 1 || configData.tcp_port > 65535) {
+        errorDiv.textContent = 'TCP port must be between 1 and 65535';
+        errorDiv.classList.remove('hidden');
+        return;
+    }
+
+    if (configData.ftp_port < 1 || configData.ftp_port > 65535) {
+        errorDiv.textContent = 'FTP port must be between 1 and 65535';
+        errorDiv.classList.remove('hidden');
+        return;
+    }
+
+    try {
+        const response = await fetch(`/api/slmm/${unitId}/config`, {
+            method: 'PUT',
+            headers: {'Content-Type': 'application/json'},
+            body: JSON.stringify(configData)
+        });
+
+        if (!response.ok) {
+            const data = await response.json().catch(() => ({}));
+            throw new Error(data.detail || 'Failed to update configuration');
+        }
+
+        successDiv.textContent = 'Configuration saved successfully!';
+        successDiv.classList.remove('hidden');
+
+        // Close modal after 1.5 seconds
+        setTimeout(() => {
+            closeSettingsModal();
+            // Optionally reload the page to reflect changes
+            // window.location.reload();
+        }, 1500);
+    } catch (error) {
+        errorDiv.textContent = error.message;
+        errorDiv.classList.remove('hidden');
+    }
+});
+
+// ========================================
+// FTP Browser Modal
+// ========================================
+async function openFTPBrowser(unitId) {
+    const modal = document.getElementById('ftp-modal');
+    document.getElementById('ftp-unit-id').value = unitId;
+    modal.classList.remove('hidden');
+
+    // Check FTP status and update UI
+    await updateFTPStatus(unitId);
+    loadFTPFiles(unitId, '/');
+}
+
+async function updateFTPStatus(unitId) {
+    const statusBadge = document.getElementById('ftp-status-badge');
+
+    // Show checking state
+    statusBadge.innerHTML = '<div class="animate-spin rounded-full h-3 w-3 border-b-2 border-gray-500 mr-2"></div>Checking...';
+    statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-gray-200 dark:bg-gray-700 text-gray-600 dark:text-gray-400';
+
+    try {
+        const response = await fetch(`/api/slmm/${unitId}/ftp/status`);
+        const result = await response.json();
+
+        if (result.status === 'ok' && result.ftp_enabled) {
+            statusBadge.innerHTML = '<span class="w-2 h-2 bg-green-500 rounded-full mr-2"></span>FTP Enabled';
+            statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-green-100 dark:bg-green-900/30 text-green-800 dark:text-green-400';
+        } else {
+            statusBadge.innerHTML = '<span class="w-2 h-2 bg-amber-500 rounded-full mr-2"></span>FTP Disabled';
+            statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-amber-100 dark:bg-amber-900/30 text-amber-800 dark:text-amber-400';
+        }
+    } catch (error) {
+        statusBadge.innerHTML = '<span class="w-2 h-2 bg-gray-500 rounded-full mr-2"></span>Status Unknown';
+        statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-gray-200 dark:bg-gray-700 text-gray-600 dark:text-gray-400';
+    }
+}
+
+function closeFTPBrowser() {
+    document.getElementById('ftp-modal').classList.add('hidden');
+}
+
+async function loadFTPFiles(unitId, path) {
+    const container = document.getElementById('ftp-files-list');
+    const pathDisplay = document.getElementById('ftp-current-path');
+    const errorDiv = document.getElementById('ftp-error');
+
+    // Update path display
+    pathDisplay.textContent = path || '/';
+
+    // Show loading state
+    container.innerHTML = '<div class="text-center py-8 text-gray-500"><div class="animate-spin rounded-full h-8 w-8 border-b-2 border-seismo-orange mx-auto mb-2"></div>Loading files...</div>';
+    errorDiv.classList.add('hidden');
+
+    try {
+        const response = await fetch(`/api/slmm/${unitId}/ftp/files?path=${encodeURIComponent(path)}`);
+        const result = await response.json();
+
+        if (response.status === 502) {
+            // FTP connection failed - likely not enabled or network issue
+            const detail = result.detail || 'Connection failed';
+            errorDiv.innerHTML = `
+                <div>
+                    <div class="flex items-center justify-between mb-3">
+                        <div class="flex-1">
+                            <p class="font-medium">FTP Connection Failed</p>
+                            <p class="text-sm mt-1">${detail}</p>
+                        </div>
+                        <button onclick="enableFTP('${unitId}')"
+                                class="px-4 py-2 bg-seismo-orange text-white rounded-lg hover:bg-orange-600 transition-colors whitespace-nowrap">
+                            Enable FTP
+                        </button>
+                    </div>
+                    <div class="text-xs bg-blue-50 dark:bg-blue-900/20 p-3 rounded">
+                        <p class="font-medium text-blue-800 dark:text-blue-400 mb-1">Troubleshooting:</p>
+                        <ul class="list-disc list-inside space-y-1 text-blue-700 dark:text-blue-300">
+                            <li>Click "Enable FTP" to activate FTP on the device</li>
+                            <li>Ensure the device is powered on and connected to the network</li>
+                            <li>Check that port 21 (FTP) is not blocked by firewalls</li>
+                            <li>Verify the modem/IP address is correct in unit settings</li>
+                        </ul>
+                    </div>
+                </div>
+            `;
+            errorDiv.classList.remove('hidden');
+            container.innerHTML = '';
+            return;
+        }
+
+        if (result.status !== 'ok') {
+            throw new Error(result.detail || 'Failed to list files');
+        }
+
+        // SLMM returns 'files' not 'data'
+        const files = result.files || result.data || [];
+
+        if (files.length === 0) {
+            container.innerHTML = '<div class="text-center py-8 text-gray-500">No files found</div>';
+            return;
+        }
+
+        // Sort: directories first, then by name
+        files.sort((a, b) => {
+            if (a.type === 'directory' && b.type !== 'directory') return -1;
+            if (a.type !== 'directory' && b.type === 'directory') return 1;
+            return a.name.localeCompare(b.name);
+        });
+
+        let html = '<div class="space-y-1">';
+
+        // Add parent directory link if not at root
+        if (path && path !== '/') {
+            const parentPath = path.split('/').slice(0, -1).join('/') || '/';
+            html += `
+                <div class="flex items-center p-3 hover:bg-gray-50 dark:hover:bg-gray-700 rounded cursor-pointer" onclick="loadFTPFiles('${unitId}', '${parentPath}')">
+                    <svg class="w-5 h-5 mr-3 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 19l-7-7m0 0l7-7m-7 7h18"></path>
+                    </svg>
+                    <span class="text-gray-600 dark:text-gray-400">..</span>
+                </div>
+            `;
+        }
+
+        // Add files and directories
+        files.forEach(file => {
+            const fullPath = file.path || (path === '/' ? `/${file.name}` : `${path}/${file.name}`);
+            const isDir = file.is_dir || file.type === 'directory';
+
+            // Determine file type icon and color
+            let icon, iconColor = 'text-gray-400';
+            if (isDir) {
+                icon = '<svg class="w-5 h-5 mr-3 text-blue-500" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z"></path></svg>';
+            } else if (file.name.toLowerCase().endsWith('.csv')) {
+                icon = '<svg class="w-5 h-5 mr-3 text-green-500" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"></path></svg>';
+            } else if (file.name.toLowerCase().match(/\.(txt|log)$/)) {
+                icon = '<svg class="w-5 h-5 mr-3 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"></path></svg>';
+            } else {
+                icon = '<svg class="w-5 h-5 mr-3 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z"></path></svg>';
+            }
+
+            const sizeText = file.size ? formatFileSize(file.size) : '';
+            const dateText = file.modified || file.modified_time || '';
+            const canPreview = !isDir && (file.name.toLowerCase().match(/\.(csv|txt|log)$/));
+
+            if (isDir) {
+                html += `
+                    <div class="flex items-center justify-between p-3 hover:bg-gray-50 dark:hover:bg-gray-700 rounded cursor-pointer transition-colors" onclick="loadFTPFiles('${unitId}', '${escapeForAttribute(fullPath)}')">
+                        <div class="flex items-center flex-1">
+                            ${icon}
+                            <span class="text-gray-900 dark:text-white font-medium">${escapeHtml(file.name)}</span>
+                        </div>
+                        <span class="text-xs text-gray-500">${dateText}</span>
+                    </div>
+                `;
+            } else {
+                html += `
+                    <div class="flex items-center justify-between p-3 hover:bg-gray-50 dark:hover:bg-gray-700 rounded transition-colors group">
+                        <div class="flex items-center flex-1 min-w-0">
+                            ${icon}
+                            <span class="text-gray-900 dark:text-white truncate">${escapeHtml(file.name)}</span>
+                        </div>
+                        <div class="flex items-center gap-3 flex-shrink-0 ml-4">
+                            <span class="text-xs text-gray-500 hidden sm:inline">${sizeText}</span>
+                            <span class="text-xs text-gray-500 hidden md:inline">${dateText}</span>
+                            ${canPreview ? `
+                            <button onclick="previewFile('${unitId}', '${escapeForAttribute(fullPath)}', '${escapeForAttribute(file.name)}')"
+                                    class="px-3 py-1 bg-blue-600 hover:bg-blue-700 text-white text-sm rounded transition-colors flex items-center"
+                                    title="Preview file">
+                                <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z"></path>
+                                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z"></path>
+                                </svg>
+                            </button>
+                            ` : ''}
+                            <button onclick="downloadFTPFile('${unitId}', '${escapeForAttribute(fullPath)}', '${escapeForAttribute(file.name)}')"
+                                    class="px-3 py-1 bg-seismo-orange hover:bg-orange-600 text-white text-sm rounded transition-colors flex items-center"
+                                    title="Download to your computer">
+                                <svg class="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4"></path>
+                                </svg>
+                                <span class="hidden lg:inline">Download</span>
+                            </button>
+                        </div>
+                    </div>
+                `;
+            }
+        });
+
+        function escapeForAttribute(str) {
+            return String(str).replace(/'/g, "\\'").replace(/"/g, '&quot;');
+        }
+
+        html += '</div>';
+        container.innerHTML = html;
+
+    } catch (error) {
+        console.error('Failed to load FTP files:', error);
+        errorDiv.textContent = error.message;
+        errorDiv.classList.remove('hidden');
+        container.innerHTML = '';
+    }
+}
+
+async function downloadFTPFile(unitId, filePath, fileName) {
+    try {
+        // Show download indicator
+        const downloadBtn = event.target;
+        const originalText = downloadBtn.innerHTML;
+        downloadBtn.innerHTML = '<svg class="w-4 h-4 animate-spin" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"></path></svg>';
+        downloadBtn.disabled = true;
+
+        const response = await fetch(`/api/slmm/${unitId}/ftp/download`, {
+            method: 'POST',
+            headers: {'Content-Type': 'application/json'},
+            body: JSON.stringify({ remote_path: filePath })
+        });
+
+        if (!response.ok) {
+            throw new Error('Download failed');
+        }
+
+        // The response is a file, so we need to create a download link
+        const blob = await response.blob();
+        const url = window.URL.createObjectURL(blob);
+        const a = document.createElement('a');
+        a.href = url;
+        a.download = fileName || filePath.split('/').pop();
+        document.body.appendChild(a);
+        a.click();
+        document.body.removeChild(a);
+        window.URL.revokeObjectURL(url);
+
+        // Reset button
+        downloadBtn.innerHTML = originalText;
+        downloadBtn.disabled = false;
+
+        // Show success message briefly
+        const originalBtnClass = downloadBtn.className;
+        downloadBtn.className = downloadBtn.className.replace('bg-seismo-orange', 'bg-green-600');
+        setTimeout(() => {
+            downloadBtn.className = originalBtnClass;
+        }, 2000);
+
+    } catch (error) {
+        console.error('Failed to download file:', error);
+        alert('Failed to download file: ' + error.message);
+        // Reset button on error
+        if (event.target) {
+            event.target.innerHTML = originalText;
+            event.target.disabled = false;
+        }
+    }
+}
+
+async function downloadToServer(unitId, filePath, fileName) {
+    try {
+        const response = await fetch(`/api/slmm/${unitId}/ftp/download`, {
+            method: 'POST',
+            headers: {'Content-Type': 'application/json'},
+            body: JSON.stringify({ remote_path: filePath, save_to_server: true })
+        });
+
+        const result = await response.json();
+
+        if (result.status === 'ok') {
+            alert(`File saved to server at: ${result.local_path}`);
+        } else {
+            throw new Error(result.detail || 'Failed to save to server');
+        }
+
+    } catch (error) {
+        console.error('Failed to save file to server:', error);
+        alert('Failed to save file to server: ' + error.message);
+    }
+}
+
+async function previewFile(unitId, filePath, fileName) {
+    const modal = document.getElementById('preview-modal');
+    const previewContent = document.getElementById('preview-content');
+    const previewTitle = document.getElementById('preview-title');
+
+    previewTitle.textContent = fileName;
+    previewContent.innerHTML = '<div class="text-center py-8"><div class="animate-spin rounded-full h-8 w-8 border-b-2 border-seismo-orange mx-auto mb-2"></div>Loading preview...</div>';
+    modal.classList.remove('hidden');
+
+    try {
+        const response = await fetch(`/api/slmm/${unitId}/ftp/download`, {
+            method: 'POST',
+            headers: {'Content-Type': 'application/json'},
+            body: JSON.stringify({ remote_path: filePath })
+        });
+
+        if (!response.ok) {
+            throw new Error('Failed to load file');
+        }
+
+        const blob = await response.blob();
+        const text = await blob.text();
+
+        // Check file type for syntax highlighting
+        const isCSV = fileName.toLowerCase().endsWith('.csv');
+        const isTXT = fileName.toLowerCase().endsWith('.txt') || fileName.toLowerCase().endsWith('.log');
+
+        if (isCSV) {
+            // Parse and display CSV as table
+            const lines = text.split('\n').filter(l => l.trim());
+            if (lines.length > 0) {
+                const headers = lines[0].split(',');
+                let tableHTML = '<div class="overflow-x-auto"><table class="min-w-full divide-y divide-gray-200 dark:divide-gray-700"><thead class="bg-gray-50 dark:bg-gray-800"><tr>';
+                headers.forEach(h => {
+                    tableHTML += `<th class="px-4 py-2 text-left text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wider">${h.trim()}</th>`;
+                });
+                tableHTML += '</tr></thead><tbody class="bg-white dark:bg-gray-900 divide-y divide-gray-200 dark:divide-gray-700">';
+
+                for (let i = 1; i < Math.min(lines.length, 101); i++) {
+                    const cells = lines[i].split(',');
+                    tableHTML += '<tr>';
+                    cells.forEach(c => {
+                        tableHTML += `<td class="px-4 py-2 text-sm text-gray-900 dark:text-gray-100">${c.trim()}</td>`;
+                    });
+                    tableHTML += '</tr>';
+                }
+
+                tableHTML += '</tbody></table></div>';
+                if (lines.length > 101) {
+                    tableHTML += `<p class="text-sm text-gray-500 mt-4 text-center">Showing first 100 rows of ${lines.length - 1} total rows</p>`;
+                }
+                previewContent.innerHTML = tableHTML;
+            }
+        } else {
+            // Display as plain text with line numbers
+            const lines = text.split('\n');
+            const maxLines = 1000;
+            const displayLines = lines.slice(0, maxLines);
+
+            let preHTML = '<pre class="text-xs font-mono bg-gray-900 text-gray-100 p-4 rounded-lg overflow-x-auto"><code>';
+            displayLines.forEach((line, i) => {
+                preHTML += `<span class="text-gray-500">${String(i + 1).padStart(4, ' ')}</span>  ${escapeHtml(line)}\n`;
+            });
+            preHTML += '</code></pre>';
+
+            if (lines.length > maxLines) {
+                preHTML += `<p class="text-sm text-gray-500 mt-4 text-center">Showing first ${maxLines} lines of ${lines.length} total lines</p>`;
+            }
+
+            previewContent.innerHTML = preHTML;
+        }
+    } catch (error) {
+        console.error('Failed to preview file:', error);
+        previewContent.innerHTML = `<div class="text-center py-8 text-red-500">Failed to load preview: ${error.message}</div>`;
+    }
+}
+
+function closePreviewModal() {
+    document.getElementById('preview-modal').classList.add('hidden');
+}
+
+function escapeHtml(text) {
+    const div = document.createElement('div');
+    div.textContent = text;
+    return div.innerHTML;
+}
+
+async function enableFTP(unitId) {
+    const errorDiv = document.getElementById('ftp-error');
+    const container = document.getElementById('ftp-files-list');
+
+    // Show loading state
+    errorDiv.innerHTML = '<div class="flex items-center"><div class="animate-spin rounded-full h-5 w-5 border-b-2 border-seismo-orange mr-3"></div>Enabling FTP on device...</div>';
+    errorDiv.classList.remove('hidden');
+
+    try {
+        const response = await fetch(`/api/slmm/${unitId}/ftp/enable`, {
+            method: 'POST'
+        });
+
+        const result = await response.json();
+
+        if (result.status !== 'ok') {
+            throw new Error(result.detail || 'Failed to enable FTP');
+        }
+
+        // Success - wait a moment then try loading files again
+        errorDiv.innerHTML = '<div class="flex items-center text-green-600 dark:text-green-400"><svg class="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"></path></svg>FTP enabled successfully. Loading files...</div>';
+
+        setTimeout(() => {
+            loadFTPFiles(unitId, '/');
+        }, 2000);
+
+    } catch (error) {
+        console.error('Failed to enable FTP:', error);
+        errorDiv.innerHTML = `
+            <div>
+                <p class="font-medium text-red-600 dark:text-red-400">Failed to enable FTP</p>
+                <p class="text-sm mt-1">${error.message}</p>
+                <button onclick="loadFTPFiles('${unitId}', '/')"
+                        class="mt-2 px-3 py-1 bg-gray-600 text-white text-sm rounded hover:bg-gray-700 transition-colors">
+                    Retry Connection
+                </button>
+            </div>
+        `;
+        errorDiv.classList.remove('hidden');
+    }
+}
+
+async function enableFTPFromHeader() {
+    const unitId = document.getElementById('ftp-unit-id').value;
+    const statusBadge = document.getElementById('ftp-status-badge');
+    const errorDiv = document.getElementById('ftp-error');
+
+    // Show enabling state
+    statusBadge.innerHTML = '<div class="animate-spin rounded-full h-3 w-3 border-b-2 border-seismo-orange mr-2"></div>Enabling...';
+    statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-blue-100 dark:bg-blue-900/30 text-blue-800 dark:text-blue-400';
+    errorDiv.classList.add('hidden');
+
+    try {
+        const response = await fetch(`/api/slmm/${unitId}/ftp/enable`, {
+            method: 'POST'
+        });
+        const result = await response.json();
+
+        if (result.status !== 'ok') {
+            throw new Error(result.detail || 'Failed to enable FTP');
+        }
+
+        // Update status badge
+        statusBadge.innerHTML = '<span class="w-2 h-2 bg-green-500 rounded-full mr-2"></span>FTP Enabled';
+        statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-green-100 dark:bg-green-900/30 text-green-800 dark:text-green-400';
+
+        // Show success message and refresh files
+        errorDiv.innerHTML = '<div class="flex items-center text-green-600 dark:text-green-400"><svg class="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"></path></svg>FTP enabled successfully</div>';
+        errorDiv.classList.remove('hidden');
+
+        setTimeout(() => {
+            errorDiv.classList.add('hidden');
+            loadFTPFiles(unitId, '/');
+        }, 2000);
+
+    } catch (error) {
+        console.error('Failed to enable FTP:', error);
+        statusBadge.innerHTML = '<span class="w-2 h-2 bg-red-500 rounded-full mr-2"></span>Enable Failed';
+        statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-red-100 dark:bg-red-900/30 text-red-800 dark:text-red-400';
+
+        errorDiv.innerHTML = `<p class="font-medium">Failed to enable FTP:</p><p class="text-sm mt-1">${error.message}</p>`;
+        errorDiv.classList.remove('hidden');
+    }
+}
+
+async function disableFTPFromHeader() {
+    const unitId = document.getElementById('ftp-unit-id').value;
+    const statusBadge = document.getElementById('ftp-status-badge');
+    const errorDiv = document.getElementById('ftp-error');
+
+    // Show disabling state
+    statusBadge.innerHTML = '<div class="animate-spin rounded-full h-3 w-3 border-b-2 border-amber-500 mr-2"></div>Disabling...';
+    statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-amber-100 dark:bg-amber-900/30 text-amber-800 dark:text-amber-400';
+    errorDiv.classList.add('hidden');
+
+    try {
+        const response = await fetch(`/api/slmm/${unitId}/ftp/disable`, {
+            method: 'POST'
+        });
+        const result = await response.json();
+
+        if (result.status !== 'ok') {
+            throw new Error(result.detail || 'Failed to disable FTP');
+        }
+
+        // Update status badge
+        statusBadge.innerHTML = '<span class="w-2 h-2 bg-amber-500 rounded-full mr-2"></span>FTP Disabled';
+        statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-amber-100 dark:bg-amber-900/30 text-amber-800 dark:text-amber-400';
+
+        // Show success message and clear files
+        errorDiv.innerHTML = '<div class="flex items-center text-amber-600 dark:text-amber-400"><svg class="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"></path></svg>FTP disabled successfully</div>';
+        errorDiv.classList.remove('hidden');
+
+        document.getElementById('ftp-files-list').innerHTML = '<div class="text-center py-8 text-gray-500">FTP is disabled. Enable it to browse files.</div>';
+
+        setTimeout(() => {
+            errorDiv.classList.add('hidden');
+        }, 3000);
+
+    } catch (error) {
+        console.error('Failed to disable FTP:', error);
+        statusBadge.innerHTML = '<span class="w-2 h-2 bg-red-500 rounded-full mr-2"></span>Disable Failed';
+        statusBadge.className = 'flex items-center text-xs px-3 py-1 rounded bg-red-100 dark:bg-red-900/30 text-red-800 dark:text-red-400';
+
+        errorDiv.innerHTML = `<p class="font-medium">Failed to disable FTP:</p><p class="text-sm mt-1">${error.message}</p>`;
+        errorDiv.classList.remove('hidden');
+    }
+}
+
+function refreshFTPFiles() {
+    const unitId = document.getElementById('ftp-unit-id').value;
+    const currentPath = document.getElementById('ftp-current-path').textContent;
+
+    // Update status
+    updateFTPStatus(unitId);
+
+    // Reload files at current path
+    loadFTPFiles(unitId, currentPath);
+}
+
+function formatFileSize(bytes) {
+    if (bytes === 0) return '0 B';
+    const k = 1024;
+    const sizes = ['B', 'KB', 'MB', 'GB'];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+    return Math.round(bytes / Math.pow(k, i) * 100) / 100 + ' ' + sizes[i];
+}
+
+// Close modals on Escape key
+document.addEventListener('keydown', function(e) {
+    if (e.key === 'Escape') {
+        closeSettingsModal();
+        closeFTPBrowser();
+    }
+});
+
+// Close modals when clicking outside
+document.getElementById('settings-modal')?.addEventListener('click', function(e) {
+    if (e.target === this) {
+        closeSettingsModal();
+    }
+});
+
+document.getElementById('ftp-modal')?.addEventListener('click', function(e) {
+    if (e.target === this) {
+        closeFTPBrowser();
+    }
+});
+
+document.getElementById('preview-modal')?.addEventListener('click', function(e) {
+    if (e.target === this) {
+        closePreviewModal();
+    }
+});
 </script>
+
+<!-- Settings Modal -->
+<div id="settings-modal" class="hidden fixed inset-0 bg-black bg-opacity-50 z-50 flex items-center justify-center overflow-y-auto">
+    <div class="bg-white dark:bg-slate-800 rounded-xl shadow-2xl w-full max-w-2xl m-4 my-8">
+        <div class="p-6 border-b border-gray-200 dark:border-gray-700 flex items-center justify-between">
+            <h3 class="text-xl font-bold text-gray-900 dark:text-white">SLM Configuration</h3>
+            <button onclick="closeSettingsModal()" class="text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200">
+                <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path>
+                </svg>
+            </button>
+        </div>
+
+        <form id="settings-form" class="p-6 space-y-6">
+            <input type="hidden" id="settings-unit-id">
+
+            <!-- Network Configuration -->
+            <div class="border border-gray-200 dark:border-gray-700 rounded-lg p-4">
+                <h4 class="font-semibold text-gray-900 dark:text-white mb-4">Network Configuration</h4>
+
+                <div class="grid grid-cols-2 gap-4">
+                    <div class="col-span-2">
+                        <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">Host / IP Address</label>
+                        <input type="text" id="settings-host"
+                               class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                               placeholder="e.g., 192.168.1.100" required>
+                    </div>
+
+                    <div>
+                        <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">TCP Port</label>
+                        <input type="number" id="settings-tcp-port"
+                               class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                               placeholder="2255" min="1" max="65535" required>
+                        <p class="text-xs text-gray-500 mt-1">Default: 2255 for NL-43/NL-53</p>
+                    </div>
+
+                    <div>
+                        <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">FTP Port</label>
+                        <input type="number" id="settings-ftp-port"
+                               class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                               placeholder="21" min="1" max="65535" required>
+                        <p class="text-xs text-gray-500 mt-1">Standard FTP port (default: 21)</p>
+                    </div>
+                </div>
+            </div>
+
+            <!-- FTP Credentials -->
+            <div class="border border-gray-200 dark:border-gray-700 rounded-lg p-4">
+                <h4 class="font-semibold text-gray-900 dark:text-white mb-4">FTP Credentials</h4>
+
+                <div class="grid grid-cols-2 gap-4">
+                    <div>
+                        <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">Username</label>
+                        <input type="text" id="settings-ftp-username"
+                               class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                               placeholder="anonymous">
+                        <p class="text-xs text-gray-500 mt-1">Leave blank for anonymous</p>
+                    </div>
+
+                    <div>
+                        <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">Password</label>
+                        <input type="password" id="settings-ftp-password"
+                               class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                               placeholder="••••••••">
+                        <p class="text-xs text-gray-500 mt-1">Leave blank for anonymous</p>
+                    </div>
+                </div>
+            </div>
+
+            <!-- Protocol Toggles -->
+            <div class="border border-gray-200 dark:border-gray-700 rounded-lg p-4">
+                <h4 class="font-semibold text-gray-900 dark:text-white mb-4">Protocol Settings</h4>
+
+                <div class="space-y-3">
+                    <label class="flex items-center justify-between p-3 bg-gray-50 dark:bg-gray-700/50 rounded-lg cursor-pointer hover:bg-gray-100 dark:hover:bg-gray-700">
+                        <div>
+                            <span class="font-medium text-gray-900 dark:text-white">TCP Communication</span>
+                            <p class="text-xs text-gray-500 dark:text-gray-400 mt-1">Enable TCP control commands</p>
+                        </div>
+                        <input type="checkbox" id="settings-tcp-enabled"
+                               class="w-5 h-5 text-seismo-orange rounded border-gray-300 dark:border-gray-600 focus:ring-seismo-orange">
+                    </label>
+
+                    <label class="flex items-center justify-between p-3 bg-gray-50 dark:bg-gray-700/50 rounded-lg cursor-pointer hover:bg-gray-100 dark:hover:bg-gray-700">
+                        <div>
+                            <span class="font-medium text-gray-900 dark:text-white">FTP File Transfer</span>
+                            <p class="text-xs text-gray-500 dark:text-gray-400 mt-1">Enable FTP file browsing and downloads</p>
+                        </div>
+                        <input type="checkbox" id="settings-ftp-enabled"
+                               class="w-5 h-5 text-seismo-orange rounded border-gray-300 dark:border-gray-600 focus:ring-seismo-orange">
+                    </label>
+
+                    <label class="flex items-center justify-between p-3 bg-gray-50 dark:bg-gray-700/50 rounded-lg cursor-pointer hover:bg-gray-100 dark:hover:bg-gray-700">
+                        <div>
+                            <span class="font-medium text-gray-900 dark:text-white">Web Interface</span>
+                            <p class="text-xs text-gray-500 dark:text-gray-400 mt-1">Enable web UI access (future feature)</p>
+                        </div>
+                        <input type="checkbox" id="settings-web-enabled"
+                               class="w-5 h-5 text-seismo-orange rounded border-gray-300 dark:border-gray-600 focus:ring-seismo-orange">
+                    </label>
+                </div>
+            </div>
+
+            <div id="settings-error" class="hidden text-sm p-3 bg-red-50 dark:bg-red-900/20 text-red-600 dark:text-red-400 rounded-lg"></div>
+            <div id="settings-success" class="hidden text-sm p-3 bg-green-50 dark:bg-green-900/20 text-green-600 dark:text-green-400 rounded-lg"></div>
+
+            <div class="flex justify-end gap-3 pt-2 border-t border-gray-200 dark:border-gray-700">
+                <button type="button" onclick="closeSettingsModal()"
+                        class="px-6 py-2 border border-gray-300 dark:border-gray-600 rounded-lg text-gray-700 dark:text-gray-300 hover:bg-gray-50 dark:hover:bg-gray-700">
+                    Cancel
+                </button>
+                <button type="submit"
+                        class="px-6 py-2 bg-seismo-orange hover:bg-orange-600 text-white rounded-lg font-medium">
+                    Save Configuration
+                </button>
+            </div>
+        </form>
+    </div>
+</div>
+
+<!-- FTP Browser Modal -->
+<div id="ftp-modal" class="hidden fixed inset-0 bg-black bg-opacity-50 z-50 flex items-center justify-center">
+    <div class="bg-white dark:bg-slate-800 rounded-xl shadow-2xl w-full max-w-4xl max-h-[90vh] overflow-hidden m-4 flex flex-col">
+        <div class="p-6 border-b border-gray-200 dark:border-gray-700">
+            <div class="flex items-center justify-between mb-4">
+                <h3 class="text-xl font-bold text-gray-900 dark:text-white">FTP File Browser</h3>
+                <button onclick="closeFTPBrowser()" class="text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200">
+                    <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path>
+                    </svg>
+                </button>
+            </div>
+
+            <div class="flex items-center justify-between">
+                <div class="flex items-center gap-4">
+                    <p class="text-sm text-gray-600 dark:text-gray-400">
+                        Path: <span id="ftp-current-path" class="font-mono">/</span>
+                    </p>
+                    <div id="ftp-status-badge" class="flex items-center text-xs px-3 py-1 rounded bg-gray-200 dark:bg-gray-700 text-gray-600 dark:text-gray-400">
+                        <div class="animate-spin rounded-full h-3 w-3 border-b-2 border-gray-500 mr-2"></div>
+                        Checking...
+                    </div>
+                </div>
+
+                <div class="flex items-center gap-2">
+                    <button id="ftp-enable-btn" onclick="enableFTPFromHeader()"
+                            class="px-3 py-1.5 bg-green-600 hover:bg-green-700 text-white text-sm rounded-lg flex items-center transition-colors">
+                        <svg class="w-4 h-4 mr-1.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"></path>
+                        </svg>
+                        Enable FTP
+                    </button>
+
+                    <button id="ftp-disable-btn" onclick="disableFTPFromHeader()"
+                            class="px-3 py-1.5 bg-amber-600 hover:bg-amber-700 text-white text-sm rounded-lg flex items-center transition-colors">
+                        <svg class="w-4 h-4 mr-1.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path>
+                        </svg>
+                        Disable FTP
+                    </button>
+
+                    <button id="ftp-refresh-btn" onclick="refreshFTPFiles()"
+                            class="px-3 py-1.5 bg-seismo-orange hover:bg-orange-600 text-white text-sm rounded-lg flex items-center transition-colors">
+                        <svg class="w-4 h-4 mr-1.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"></path>
+                        </svg>
+                        Refresh
+                    </button>
+                </div>
+            </div>
+        </div>
+
+        <div class="flex-1 overflow-y-auto p-6">
+            <input type="hidden" id="ftp-unit-id">
+
+            <div id="ftp-error" class="hidden mb-4 p-4 bg-red-100 dark:bg-red-900/30 text-red-800 dark:text-red-400 rounded-lg text-sm"></div>
+
+            <div id="ftp-files-list">
+                <!-- Files will be loaded here -->
+            </div>
+        </div>
+    </div>
+</div>
+
+<!-- File Preview Modal -->
+<div id="preview-modal" class="hidden fixed inset-0 bg-black bg-opacity-50 z-50 flex items-center justify-center p-4">
+    <div class="bg-white dark:bg-slate-800 rounded-xl shadow-2xl w-full max-w-6xl max-h-[90vh] overflow-hidden flex flex-col">
+        <div class="p-6 border-b border-gray-200 dark:border-gray-700 flex items-center justify-between flex-shrink-0">
+            <h3 class="text-xl font-bold text-gray-900 dark:text-white flex items-center">
+                <svg class="w-6 h-6 mr-2 text-blue-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z"></path>
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z"></path>
+                </svg>
+                <span id="preview-title">File Preview</span>
+            </h3>
+            <button onclick="closePreviewModal()" class="text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200">
+                <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path>
+                </svg>
+            </button>
+        </div>
+
+        <div class="flex-1 overflow-y-auto p-6 bg-gray-50 dark:bg-gray-900" id="preview-content">
+            <!-- Preview content will be loaded here -->
+        </div>
+    </div>
+</div>

templates/roster.html

@@ -372,6 +372,12 @@
                 <button type="submit" class="flex-1 px-4 py-2 bg-seismo-orange hover:bg-orange-600 text-white rounded-lg transition-colors">
                     Save Changes
                 </button>
+                <button type="button" onclick="openRenameUnitModal()" class="px-4 py-2 bg-blue-600 hover:bg-blue-700 text-white rounded-lg transition-colors flex items-center gap-2">
+                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15.232 5.232l3.536 3.536m-2.036-5.036a2.5 2.5 0 113.536 3.536L6.5 21.036H3v-3.572L16.732 3.732z"></path>
+                    </svg>
+                    Rename
+                </button>
                 <button type="button" onclick="closeEditUnitModal()" class="px-4 py-2 bg-gray-300 dark:bg-gray-600 hover:bg-gray-400 dark:hover:bg-gray-500 text-gray-700 dark:text-white rounded-lg transition-colors">
                     Cancel
                 </button>
@@ -380,6 +386,59 @@
     </div>
 </div>
 
+<!-- Rename Unit Modal -->
+<div id="renameUnitModal" class="hidden fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
+    <div class="bg-white dark:bg-slate-800 rounded-xl shadow-2xl max-w-md w-full mx-4">
+        <div class="p-6 border-b border-gray-200 dark:border-gray-700">
+            <div class="flex justify-between items-center">
+                <h2 class="text-2xl font-bold text-gray-900 dark:text-white">Rename Unit</h2>
+                <button onclick="closeRenameUnitModal()" class="text-gray-400 hover:text-gray-600 dark:hover:text-gray-300">
+                    <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path>
+                    </svg>
+                </button>
+            </div>
+        </div>
+        <form id="renameUnitForm" class="p-6 space-y-4">
+            <div class="bg-yellow-50 dark:bg-yellow-900/20 border border-yellow-200 dark:border-yellow-800 rounded-lg p-4 mb-4">
+                <div class="flex items-start gap-3">
+                    <svg class="w-6 h-6 text-yellow-600 dark:text-yellow-400 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"></path>
+                    </svg>
+                    <div>
+                        <p class="text-sm font-medium text-yellow-800 dark:text-yellow-200">Important: Renaming Changes All References</p>
+                        <p class="text-xs text-yellow-700 dark:text-yellow-300 mt-1">
+                            This will update the unit ID everywhere including history, assignments, and sessions.
+                        </p>
+                    </div>
+                </div>
+            </div>
+
+            <div>
+                <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">Current Unit ID</label>
+                <input type="text" id="renameOldId" readonly
+                    class="w-full px-4 py-2 rounded-lg border border-gray-300 dark:border-gray-600 bg-gray-100 dark:bg-gray-700 text-gray-500 dark:text-gray-400 cursor-not-allowed font-mono">
+            </div>
+
+            <div>
+                <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">New Unit ID *</label>
+                <input type="text" id="renameNewId" required pattern="[^\s]+" title="Unit ID cannot contain spaces"
+                    class="w-full px-4 py-2 rounded-lg border border-gray-300 dark:border-gray-600 bg-white dark:bg-slate-700 text-gray-900 dark:text-white focus:ring-2 focus:ring-blue-500 font-mono"
+                    placeholder="Enter new unit ID (no spaces)">
+            </div>
+
+            <div class="flex gap-3 pt-4">
+                <button type="submit" class="flex-1 px-4 py-2 bg-blue-600 hover:bg-blue-700 text-white rounded-lg transition-colors font-medium">
+                    Rename Unit
+                </button>
+                <button type="button" onclick="closeRenameUnitModal()" class="px-4 py-2 bg-gray-300 dark:bg-gray-600 hover:bg-gray-400 dark:hover:bg-gray-500 text-gray-700 dark:text-white rounded-lg transition-colors">
+                    Cancel
+                </button>
+            </div>
+        </form>
+    </div>
+</div>
+
 <!-- Import CSV Modal -->
 <div id="importModal" class="hidden fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
     <div class="bg-white dark:bg-slate-800 rounded-xl shadow-2xl max-w-lg w-full mx-4">
@@ -1077,6 +1136,76 @@
     function filterRosterTable() {
         filterDevices();
     }
+
+    // Rename Unit Modal Functions
+    function openRenameUnitModal() {
+        const currentUnitId = document.getElementById('editUnitId').value;
+        document.getElementById('renameOldId').value = currentUnitId;
+        document.getElementById('renameNewId').value = '';
+        document.getElementById('renameUnitModal').classList.remove('hidden');
+    }
+
+    function closeRenameUnitModal() {
+        document.getElementById('renameUnitModal').classList.add('hidden');
+        document.getElementById('renameUnitForm').reset();
+    }
+
+    // Handle Rename Unit form submission
+    document.getElementById('renameUnitForm').addEventListener('submit', async function(event) {
+        event.preventDefault();
+
+        const oldId = document.getElementById('renameOldId').value;
+        const newId = document.getElementById('renameNewId').value.trim();
+
+        if (!newId) {
+            alert('Please enter a new unit ID');
+            return;
+        }
+
+        if (oldId === newId) {
+            alert('New unit ID must be different from the current ID');
+            return;
+        }
+
+        // Final confirmation
+        const confirmed = confirm(
+            `Are you sure you want to rename '${oldId}' to '${newId}'?\n\n` +
+            `This will update:\n` +
+            `• Unit roster entry\n` +
+            `• All history records\n` +
+            `• Project assignments\n` +
+            `• Recording sessions\n` +
+            `• Modem references\n\n` +
+            `This action cannot be undone.`
+        );
+
+        if (!confirmed) return;
+
+        const formData = new FormData();
+        formData.append('old_id', oldId);
+        formData.append('new_id', newId);
+
+        try {
+            const response = await fetch('/api/roster/rename', {
+                method: 'POST',
+                body: formData
+            });
+
+            const result = await response.json();
+
+            if (response.ok && result.success) {
+                alert(`✓ Successfully renamed unit from '${oldId}' to '${newId}'`);
+                closeRenameUnitModal();
+                closeEditUnitModal();
+                // Reload the page to show updated unit ID
+                window.location.reload();
+            } else {
+                alert(`Error: ${result.detail || result.message || 'Failed to rename unit'}`);
+            }
+        } catch (error) {
+            alert(`Error renaming unit: ${error.message}`);
+        }
+    });
 </script>
 
 <style>

templates/slm_detail.html

@@ -18,13 +18,61 @@
             </a>
         </nav>
     {% else %}
-        <a href="/roster" class="text-seismo-orange hover:text-seismo-orange-dark flex items-center">
+        <a href="#" onclick="goBack(event)" class="text-seismo-orange hover:text-seismo-orange-dark flex items-center">
             <svg class="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"></path>
             </svg>
-            Back to Roster
+            <span id="back-link-text">Back to Sound Level Meters</span>
         </a>
     {% endif %}
+
+    <script>
+    function goBack(event) {
+        event.preventDefault();
+
+        // Check if there's a previous page in history
+        // and it's from the same site (not external)
+        if (window.history.length > 1 && document.referrer) {
+            const referrer = new URL(document.referrer);
+            const current = new URL(window.location.href);
+
+            // If referrer is from the same origin, go back
+            if (referrer.origin === current.origin) {
+                window.history.back();
+                return;
+            }
+        }
+
+        // Otherwise, go to SLM dashboard
+        window.location.href = '/sound-level-meters';
+    }
+
+    // Update the back link text based on referrer
+    document.addEventListener('DOMContentLoaded', function() {
+        const backText = document.getElementById('back-link-text');
+        if (backText && document.referrer) {
+            try {
+                const referrer = new URL(document.referrer);
+                const current = new URL(window.location.href);
+
+                // Only update if from same origin
+                if (referrer.origin === current.origin) {
+                    if (referrer.pathname.includes('/sound-level-meters')) {
+                        backText.textContent = 'Back to Sound Level Meters';
+                    } else if (referrer.pathname.includes('/roster')) {
+                        backText.textContent = 'Back to Roster';
+                    } else if (referrer.pathname.includes('/projects')) {
+                        backText.textContent = 'Back to Projects';
+                    } else if (referrer.pathname === '/') {
+                        backText.textContent = 'Back to Dashboard';
+                    }
+                }
+            } catch (e) {
+                // Invalid referrer, keep default text
+            }
+        }
+    });
+    </script>
 </div>
 
 <div class="mb-8">
@@ -52,159 +100,16 @@
     </div>
 </div>
 
-<!-- Control Panel -->
+<!-- Command Center -->
-<div class="mb-8">
+<div class="bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6">
-    <h2 class="text-xl font-semibold text-gray-900 dark:text-white mb-4">Control Panel</h2>
+    <div id="slm-command-center"
-    <div hx-get="/slm/partials/{{ unit_id }}/controls"
+         hx-get="/api/slm-dashboard/live-view/{{ unit_id }}"
-         hx-trigger="load, every 5s"
+         hx-trigger="load"
          hx-swap="innerHTML">
-        <div class="text-center py-8 text-gray-500">Loading controls...</div>
+        <div class="text-center py-8 text-gray-500">
-    </div>
+            <div class="animate-spin rounded-full h-12 w-12 border-b-2 border-seismo-orange mx-auto mb-4"></div>
-</div>
+            <p>Loading command center...</p>
-
-<!-- Real-time Data Stream -->
-<div class="mb-8">
-    <h2 class="text-xl font-semibold text-gray-900 dark:text-white mb-4">Real-time Measurements</h2>
-    <div class="bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6">
-        <div id="slm-stream-container">
-            <div class="text-center py-8">
-                <button onclick="startStream()"
-                        id="stream-start-btn"
-                        class="px-6 py-3 bg-seismo-orange text-white rounded-lg hover:bg-seismo-orange-dark transition-colors">
-                    Start Real-time Stream
-                </button>
-                <p class="text-sm text-gray-500 mt-2">Click to begin streaming live measurement data</p>
-            </div>
-            <div id="stream-data" class="hidden">
-                <div class="grid grid-cols-2 md:grid-cols-4 gap-4 mb-4">
-                    <div class="bg-gray-50 dark:bg-gray-900 rounded-lg p-4">
-                        <div class="text-sm text-gray-600 dark:text-gray-400 mb-1">Lp (Instant)</div>
-                        <div id="stream-lp" class="text-3xl font-bold text-gray-900 dark:text-white">--</div>
-                        <div class="text-xs text-gray-500">dB</div>
-                    </div>
-                    <div class="bg-gray-50 dark:bg-gray-900 rounded-lg p-4">
-                        <div class="text-sm text-gray-600 dark:text-gray-400 mb-1">Leq (Average)</div>
-                        <div id="stream-leq" class="text-3xl font-bold text-blue-600 dark:text-blue-400">--</div>
-                        <div class="text-xs text-gray-500">dB</div>
-                    </div>
-                    <div class="bg-gray-50 dark:bg-gray-900 rounded-lg p-4">
-                        <div class="text-sm text-gray-600 dark:text-gray-400 mb-1">Lmax</div>
-                        <div id="stream-lmax" class="text-3xl font-bold text-red-600 dark:text-red-400">--</div>
-                        <div class="text-xs text-gray-500">dB</div>
-                    </div>
-                    <div class="bg-gray-50 dark:bg-gray-900 rounded-lg p-4">
-                        <div class="text-sm text-gray-600 dark:text-gray-400 mb-1">Lmin</div>
-                        <div id="stream-lmin" class="text-3xl font-bold text-green-600 dark:text-green-400">--</div>
-                        <div class="text-xs text-gray-500">dB</div>
-                    </div>
-                </div>
-                <div class="flex justify-between items-center">
-                    <div class="text-xs text-gray-500">
-                        <span class="inline-block w-2 h-2 bg-green-500 rounded-full mr-2 animate-pulse"></span>
-                        Streaming
-                    </div>
-                    <button onclick="stopStream()"
-                            class="px-4 py-2 bg-red-600 text-white text-sm rounded-lg hover:bg-red-700 transition-colors">
-                        Stop Stream
-                    </button>
-                </div>
-            </div>
         </div>
     </div>
 </div>
-
-<!-- Device Information -->
-<div class="mb-8">
-    <h2 class="text-xl font-semibold text-gray-900 dark:text-white mb-4">Device Information</h2>
-    <div class="bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6">
-        <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
-            <div>
-                <div class="text-sm text-gray-600 dark:text-gray-400">Model</div>
-                <div class="text-lg font-medium text-gray-900 dark:text-white">{{ unit.slm_model or 'NL-43' }}</div>
-            </div>
-            <div>
-                <div class="text-sm text-gray-600 dark:text-gray-400">Serial Number</div>
-                <div class="text-lg font-medium text-gray-900 dark:text-white">{{ unit.slm_serial_number or 'N/A' }}</div>
-            </div>
-            <div>
-                <div class="text-sm text-gray-600 dark:text-gray-400">Host</div>
-                <div class="text-lg font-medium text-gray-900 dark:text-white">{{ unit.slm_host or 'Not configured' }}</div>
-            </div>
-            <div>
-                <div class="text-sm text-gray-600 dark:text-gray-400">TCP Port</div>
-                <div class="text-lg font-medium text-gray-900 dark:text-white">{{ unit.slm_tcp_port or 'N/A' }}</div>
-            </div>
-            <div>
-                <div class="text-sm text-gray-600 dark:text-gray-400">Frequency Weighting</div>
-                <div class="text-lg font-medium text-gray-900 dark:text-white">{{ unit.slm_frequency_weighting or 'A' }}</div>
-            </div>
-            <div>
-                <div class="text-sm text-gray-600 dark:text-gray-400">Time Weighting</div>
-                <div class="text-lg font-medium text-gray-900 dark:text-white">{{ unit.slm_time_weighting or 'F (Fast)' }}</div>
-            </div>
-            <div class="md:col-span-2">
-                <div class="text-sm text-gray-600 dark:text-gray-400">Location</div>
-                <div class="text-lg font-medium text-gray-900 dark:text-white">{{ unit.address or unit.location or 'Not specified' }}</div>
-            </div>
-            {% if unit.note %}
-            <div class="md:col-span-2">
-                <div class="text-sm text-gray-600 dark:text-gray-400">Notes</div>
-                <div class="text-gray-900 dark:text-white">{{ unit.note }}</div>
-            </div>
-            {% endif %}
-        </div>
-    </div>
-</div>
-
-<script>
-let ws = null;
-
-function startStream() {
-    const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
-    const wsUrl = `${protocol}//${window.location.host}/api/slmm/{{ unit_id }}/stream`;
-
-    ws = new WebSocket(wsUrl);
-
-    ws.onopen = () => {
-        document.getElementById('stream-start-btn').classList.add('hidden');
-        document.getElementById('stream-data').classList.remove('hidden');
-        console.log('WebSocket connected');
-    };
-
-    ws.onmessage = (event) => {
-        const data = JSON.parse(event.data);
-
-        if (data.error) {
-            console.error('Stream error:', data.error);
-            stopStream();
-            alert('Error: ' + data.error);
-            return;
-        }
-
-        // Update values
-        document.getElementById('stream-lp').textContent = data.lp || '--';
-        document.getElementById('stream-leq').textContent = data.leq || '--';
-        document.getElementById('stream-lmax').textContent = data.lmax || '--';
-        document.getElementById('stream-lmin').textContent = data.lmin || '--';
-    };
-
-    ws.onerror = (error) => {
-        console.error('WebSocket error:', error);
-        stopStream();
-    };
-
-    ws.onclose = () => {
-        console.log('WebSocket closed');
-    };
-}
-
-function stopStream() {
-    if (ws) {
-        ws.close();
-        ws = null;
-    }
-    document.getElementById('stream-start-btn').classList.remove('hidden');
-    document.getElementById('stream-data').classList.add('hidden');
-}
-</script>
 {% endblock %}

templates/slm_legacy_dashboard.html

@@ -6,7 +6,30 @@
 <!-- Breadcrumb Navigation -->
 <div class="mb-6">
     <nav class="flex items-center space-x-2 text-sm">
-        {% if from_project and project %}
+        {% if from_nrl and nrl_location and from_project and project %}
+            <!-- From NRL Location: Projects > Project > NRL > Unit -->
+            <a href="/projects" class="text-gray-500 hover:text-seismo-orange">Projects</a>
+            <svg class="w-4 h-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"></path>
+            </svg>
+            <a href="/projects/{{ from_project }}" class="text-gray-500 hover:text-seismo-orange">
+                {{ project.name }}
+            </a>
+            <svg class="w-4 h-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"></path>
+            </svg>
+            <a href="/projects/{{ from_project }}/nrl/{{ from_nrl }}" class="text-seismo-orange hover:text-seismo-navy flex items-center">
+                <svg class="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"></path>
+                </svg>
+                {{ nrl_location.name }}
+            </a>
+            <svg class="w-4 h-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"></path>
+            </svg>
+            <span class="text-gray-900 dark:text-white font-medium">{{ unit_id }}</span>
+        {% elif from_project and project %}
+            <!-- From Project: Projects > Project > Unit -->
             <a href="/projects" class="text-gray-500 hover:text-seismo-orange">Projects</a>
             <svg class="w-4 h-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"></path>
@@ -22,6 +45,7 @@
             </svg>
             <span class="text-gray-900 dark:text-white font-medium">{{ unit_id }}</span>
         {% else %}
+            <!-- Default: Sound Level Meters > Unit -->
             <a href="/sound-level-meters" class="text-seismo-orange hover:text-seismo-navy flex items-center">
                 <svg class="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                     <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"></path>
@@ -47,9 +71,11 @@
                 {{ unit_id }}
             </h1>
             <p class="text-gray-600 dark:text-gray-400 mt-1">
-                Sound Level Meter Control Center
+                Sound Level Meter {% if from_project or from_nrl %}Operations{% else %}Control Center{% endif %}
             </p>
         </div>
+        {% if not from_project and not from_nrl %}
+        <!-- Configure button only shown in administrative context (accessed from roster/SLM dashboard) -->
         <div class="flex gap-3">
             <button onclick="openConfigModal()"
                     class="px-4 py-2 bg-gray-100 dark:bg-gray-700 text-gray-700 dark:text-gray-300 rounded-lg hover:bg-gray-200 dark:hover:bg-gray-600 transition-colors flex items-center">
@@ -60,6 +86,7 @@
                 Configure
             </button>
         </div>
+        {% endif %}
     </div>
 </div>
 

templates/sound_level_meters.html

@@ -4,8 +4,13 @@
 
 {% block content %}
 <div class="mb-8">
-    <h1 class="text-3xl font-bold text-gray-900 dark:text-white">Sound Level Meters</h1>
+    <h1 class="text-3xl font-bold text-gray-900 dark:text-white flex items-center">
-    <p class="text-gray-600 dark:text-gray-400 mt-1">Monitor and manage sound level measurement devices</p>
+        <svg class="w-8 h-8 mr-3 text-seismo-orange" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15.536 8.464a5 5 0 010 7.072m2.828-9.9a9 9 0 010 12.728M5.586 15H4a1 1 0 01-1-1v-4a1 1 0 011-1h1.586l4.707-4.707C10.923 3.663 12 4.109 12 5v14c0 .891-1.077 1.337-1.707.707L5.586 15z"></path>
+        </svg>
+        Sound Level Meters
+    </h1>
+    <p class="text-gray-600 dark:text-gray-400 mt-1">Monitor and control sound level measurement devices</p>
 </div>
 
 <!-- Summary Stats -->
@@ -20,17 +25,107 @@
     <div class="animate-pulse bg-gray-200 dark:bg-gray-700 h-24 rounded-xl"></div>
 </div>
 
-<!-- Main Content Grid -->
+<!-- Device List with Quick Actions -->
-<div class="grid grid-cols-1 lg:grid-cols-2 gap-6">
+<div class="bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6 mb-8">
-    <!-- Projects Card -->
+    <div class="flex items-center justify-between mb-6">
-    <div class="bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6">
+        <h2 class="text-xl font-semibold text-gray-900 dark:text-white">Active Devices</h2>
+        <div class="flex items-center gap-3">
+            <span class="text-sm text-gray-500 dark:text-gray-400">Auto-refresh: 15s</span>
+            <a href="/roster" class="text-sm text-seismo-orange hover:text-seismo-navy">Manage roster</a>
+        </div>
+    </div>
+
+    <div id="slm-devices-list"
+         class="space-y-3"
+         hx-get="/api/slm-dashboard/units?include_measurement=true"
+         hx-trigger="load, every 15s"
+         hx-swap="innerHTML">
+        <div class="animate-pulse space-y-3">
+            <div class="bg-gray-200 dark:bg-gray-700 h-32 rounded-lg"></div>
+            <div class="bg-gray-200 dark:bg-gray-700 h-32 rounded-lg"></div>
+            <div class="bg-gray-200 dark:bg-gray-700 h-32 rounded-lg"></div>
+        </div>
+    </div>
+</div>
+
+<!-- Live Measurement Chart - shows when a device is selected -->
+<div id="live-chart-panel" class="hidden bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6 mb-8">
+    <div class="flex items-center justify-between mb-6">
+        <h2 class="text-xl font-semibold text-gray-900 dark:text-white">Live Measurements</h2>
+        <button onclick="closeLiveChart()" class="text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200">
+            <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path>
+            </svg>
+        </button>
+    </div>
+
+    <!-- Current Metrics -->
+    <div class="grid grid-cols-5 gap-4 mb-6">
+        <div class="bg-blue-50 dark:bg-blue-900/20 rounded-lg p-4">
+            <p class="text-xs text-gray-600 dark:text-gray-400 mb-1">Lp (Instant)</p>
+            <p id="chart-lp" class="text-2xl font-bold text-blue-600 dark:text-blue-400">--</p>
+            <p class="text-xs text-gray-500 dark:text-gray-400">dB</p>
+        </div>
+
+        <div class="bg-green-50 dark:bg-green-900/20 rounded-lg p-4">
+            <p class="text-xs text-gray-600 dark:text-gray-400 mb-1">Leq (Average)</p>
+            <p id="chart-leq" class="text-2xl font-bold text-green-600 dark:text-green-400">--</p>
+            <p class="text-xs text-gray-500 dark:text-gray-400">dB</p>
+        </div>
+
+        <div class="bg-red-50 dark:bg-red-900/20 rounded-lg p-4">
+            <p class="text-xs text-gray-600 dark:text-gray-400 mb-1">Lmax (Max)</p>
+            <p id="chart-lmax" class="text-2xl font-bold text-red-600 dark:text-red-400">--</p>
+            <p class="text-xs text-gray-500 dark:text-gray-400">dB</p>
+        </div>
+
+        <div class="bg-purple-50 dark:bg-purple-900/20 rounded-lg p-4">
+            <p class="text-xs text-gray-600 dark:text-gray-400 mb-1">Lmin (Min)</p>
+            <p id="chart-lmin" class="text-2xl font-bold text-purple-600 dark:text-purple-400">--</p>
+            <p class="text-xs text-gray-500 dark:text-gray-400">dB</p>
+        </div>
+
+        <div class="bg-orange-50 dark:bg-orange-900/20 rounded-lg p-4">
+            <p class="text-xs text-gray-600 dark:text-gray-400 mb-1">Lpeak (Peak)</p>
+            <p id="chart-lpeak" class="text-2xl font-bold text-orange-600 dark:text-orange-400">--</p>
+            <p class="text-xs text-gray-500 dark:text-gray-400">dB</p>
+        </div>
+    </div>
+
+    <!-- Chart -->
+    <div class="bg-gray-50 dark:bg-gray-900/50 rounded-lg p-4" style="min-height: 400px;">
+        <canvas id="dashboardLiveChart"></canvas>
+    </div>
+
+    <!-- Stream Control -->
+    <div class="mt-4 flex justify-center gap-3">
+        <button id="start-chart-stream" onclick="startDashboardStream()"
+                class="px-6 py-2 bg-seismo-orange hover:bg-orange-600 text-white rounded-lg flex items-center">
+            <svg class="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 10V3L4 14h7v7l9-11h-7z"></path>
+            </svg>
+            Start Live Stream
+        </button>
+        <button id="stop-chart-stream" onclick="stopDashboardStream()" style="display: none;"
+                class="px-6 py-2 bg-red-600 hover:bg-red-700 text-white rounded-lg flex items-center">
+            <svg class="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path>
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 10a1 1 0 011-1h4a1 1 0 011 1v4a1 1 0 01-1 1h-4a1 1 0 01-1-1v-4z"></path>
+            </svg>
+            Stop Live Stream
+        </button>
+    </div>
+</div>
+
+<!-- Projects Overview -->
+<div class="bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6">
     <div class="flex items-center justify-between mb-4">
-            <h2 class="text-xl font-semibold text-gray-900 dark:text-white">Projects</h2>
+        <h2 class="text-xl font-semibold text-gray-900 dark:text-white">Active Projects</h2>
         <a href="/projects" class="text-sm text-seismo-orange hover:text-seismo-navy">View all</a>
     </div>
 
     <div id="slm-projects-list"
-             class="space-y-3 max-h-[600px] overflow-y-auto"
+         class="space-y-3 max-h-[400px] overflow-y-auto"
          hx-get="/api/projects/list?status=active&project_type_id=sound_monitoring&view=compact"
          hx-trigger="load, every 60s"
          hx-swap="innerHTML">
@@ -40,27 +135,6 @@
             <div class="bg-gray-200 dark:bg-gray-700 h-20 rounded-lg"></div>
         </div>
     </div>
-    </div>
-
-    <!-- Devices Card -->
-    <div class="bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6">
-        <div class="flex items-center justify-between mb-4">
-            <h2 class="text-xl font-semibold text-gray-900 dark:text-white">Devices</h2>
-            <a href="/roster" class="text-sm text-seismo-orange hover:text-seismo-navy">Manage roster</a>
-        </div>
-
-        <div id="slm-devices-list"
-             class="space-y-3 max-h-[600px] overflow-y-auto"
-             hx-get="/api/slm-dashboard/units?include_measurement=true"
-             hx-trigger="load, every 15s"
-             hx-swap="innerHTML">
-            <div class="animate-pulse space-y-3">
-                <div class="bg-gray-200 dark:bg-gray-700 h-20 rounded-lg"></div>
-                <div class="bg-gray-200 dark:bg-gray-700 h-20 rounded-lg"></div>
-                <div class="bg-gray-200 dark:bg-gray-700 h-20 rounded-lg"></div>
-            </div>
-        </div>
-    </div>
 </div>
 
 <!-- Configuration Modal -->
@@ -85,7 +159,213 @@
     </div>
 </div>
 
+<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
 <script>
+// Global variables
+window.dashboardChart = null;
+window.dashboardWebSocket = null;
+window.selectedUnitId = null;
+window.dashboardChartData = {
+    timestamps: [],
+    lp: [],
+    leq: []
+};
+
+// Initialize Chart.js
+function initializeDashboardChart() {
+    if (typeof Chart === 'undefined') {
+        setTimeout(initializeDashboardChart, 100);
+        return;
+    }
+
+    const canvas = document.getElementById('dashboardLiveChart');
+    if (!canvas) return;
+
+    if (window.dashboardChart) {
+        window.dashboardChart.destroy();
+    }
+
+    const ctx = canvas.getContext('2d');
+    const isDarkMode = document.documentElement.classList.contains('dark');
+    const gridColor = isDarkMode ? 'rgba(255, 255, 255, 0.1)' : 'rgba(0, 0, 0, 0.1)';
+    const textColor = isDarkMode ? 'rgba(255, 255, 255, 0.7)' : 'rgba(0, 0, 0, 0.7)';
+
+    window.dashboardChart = new Chart(ctx, {
+        type: 'line',
+        data: {
+            labels: [],
+            datasets: [
+                {
+                    label: 'Lp (Instantaneous)',
+                    data: [],
+                    borderColor: 'rgb(59, 130, 246)',
+                    backgroundColor: 'rgba(59, 130, 246, 0.1)',
+                    tension: 0.3,
+                    borderWidth: 2,
+                    pointRadius: 0
+                },
+                {
+                    label: 'Leq (Equivalent)',
+                    data: [],
+                    borderColor: 'rgb(34, 197, 94)',
+                    backgroundColor: 'rgba(34, 197, 94, 0.1)',
+                    tension: 0.3,
+                    borderWidth: 2,
+                    pointRadius: 0
+                }
+            ]
+        },
+        options: {
+            responsive: true,
+            maintainAspectRatio: false,
+            animation: false,
+            interaction: {
+                intersect: false,
+                mode: 'index'
+            },
+            scales: {
+                x: {
+                    display: true,
+                    grid: { color: gridColor },
+                    ticks: { color: textColor, maxTicksLimit: 10 }
+                },
+                y: {
+                    display: true,
+                    title: {
+                        display: true,
+                        text: 'Sound Level (dB)',
+                        color: textColor
+                    },
+                    grid: { color: gridColor },
+                    ticks: { color: textColor },
+                    min: 30,
+                    max: 130
+                }
+            },
+            plugins: {
+                legend: {
+                    labels: { color: textColor }
+                }
+            }
+        }
+    });
+}
+
+// Show live chart for a specific unit
+function showLiveChart(unitId) {
+    window.selectedUnitId = unitId;
+    const panel = document.getElementById('live-chart-panel');
+    panel.classList.remove('hidden');
+
+    // Initialize chart if needed
+    if (!window.dashboardChart) {
+        initializeDashboardChart();
+    }
+
+    // Reset data
+    window.dashboardChartData = {
+        timestamps: [],
+        lp: [],
+        leq: []
+    };
+
+    // Scroll to chart
+    panel.scrollIntoView({ behavior: 'smooth', block: 'start' });
+}
+
+function closeLiveChart() {
+    stopDashboardStream();
+    document.getElementById('live-chart-panel').classList.add('hidden');
+    window.selectedUnitId = null;
+}
+
+// WebSocket streaming
+function startDashboardStream() {
+    if (!window.selectedUnitId) return;
+
+    // Close existing connection
+    if (window.dashboardWebSocket) {
+        window.dashboardWebSocket.close();
+    }
+
+    // Reset chart data
+    window.dashboardChartData = { timestamps: [], lp: [], leq: [] };
+    if (window.dashboardChart) {
+        window.dashboardChart.data.labels = [];
+        window.dashboardChart.data.datasets[0].data = [];
+        window.dashboardChart.data.datasets[1].data = [];
+        window.dashboardChart.update();
+    }
+
+    const wsProtocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
+    const wsUrl = `${wsProtocol}//${window.location.host}/api/slmm/${window.selectedUnitId}/live`;
+
+    window.dashboardWebSocket = new WebSocket(wsUrl);
+
+    window.dashboardWebSocket.onopen = function() {
+        console.log('Dashboard WebSocket connected');
+        document.getElementById('start-chart-stream').style.display = 'none';
+        document.getElementById('stop-chart-stream').style.display = 'flex';
+    };
+
+    window.dashboardWebSocket.onmessage = function(event) {
+        try {
+            const data = JSON.parse(event.data);
+            updateDashboardMetrics(data);
+            updateDashboardChart(data);
+        } catch (error) {
+            console.error('Error parsing WebSocket message:', error);
+        }
+    };
+
+    window.dashboardWebSocket.onerror = function(error) {
+        console.error('Dashboard WebSocket error:', error);
+    };
+
+    window.dashboardWebSocket.onclose = function() {
+        console.log('Dashboard WebSocket closed');
+        document.getElementById('start-chart-stream').style.display = 'flex';
+        document.getElementById('stop-chart-stream').style.display = 'none';
+    };
+}
+
+function stopDashboardStream() {
+    if (window.dashboardWebSocket) {
+        window.dashboardWebSocket.close();
+        window.dashboardWebSocket = null;
+    }
+}
+
+function updateDashboardMetrics(data) {
+    document.getElementById('chart-lp').textContent = data.lp || '--';
+    document.getElementById('chart-leq').textContent = data.leq || '--';
+    document.getElementById('chart-lmax').textContent = data.lmax || '--';
+    document.getElementById('chart-lmin').textContent = data.lmin || '--';
+    document.getElementById('chart-lpeak').textContent = data.lpeak || '--';
+}
+
+function updateDashboardChart(data) {
+    const now = new Date();
+    window.dashboardChartData.timestamps.push(now.toLocaleTimeString());
+    window.dashboardChartData.lp.push(parseFloat(data.lp || 0));
+    window.dashboardChartData.leq.push(parseFloat(data.leq || 0));
+
+    // Keep only last 60 data points
+    if (window.dashboardChartData.timestamps.length > 60) {
+        window.dashboardChartData.timestamps.shift();
+        window.dashboardChartData.lp.shift();
+        window.dashboardChartData.leq.shift();
+    }
+
+    if (window.dashboardChart) {
+        window.dashboardChart.data.labels = window.dashboardChartData.timestamps;
+        window.dashboardChart.data.datasets[0].data = window.dashboardChartData.lp;
+        window.dashboardChart.data.datasets[1].data = window.dashboardChartData.leq;
+        window.dashboardChart.update('none');
+    }
+}
+
+// Configuration modal
 function openDeviceConfigModal(unitId) {
     const modal = document.getElementById('slm-config-modal');
     modal.classList.remove('hidden');
@@ -111,5 +391,10 @@ document.getElementById('slm-config-modal')?.addEventListener('click', function(
         closeDeviceConfigModal();
     }
 });
+
+// Cleanup on page unload
+window.addEventListener('beforeunload', function() {
+    stopDashboardStream();
+});
 </script>
 {% endblock %}