backend/routers/slm_dashboard.py

@@ -94,6 +94,7 @@ async def get_slm_units(
         # Legacy default from the roster field; refined from SLMM's cached status below.
         unit.is_recent = bool(unit.slm_last_check and unit.slm_last_check > one_hour_ago)
         unit.measurement_state = None
+        unit.cache_last_seen = None  # SLMM cache last_seen (real monitoring freshness)
 
     if include_measurement:
         # SLMM's /roster carries each unit's CACHED status (last_seen,
@@ -124,6 +125,7 @@ async def get_slm_units(
                 try:
                     ls = datetime.fromisoformat(last_seen.replace("Z", ""))
                     unit.is_recent = ls > recent_cutoff
+                    unit.cache_last_seen = ls  # the real freshness the monitor updates
                 except Exception:
                     pass
 

templates/partials/slm_device_list.html

@@ -49,7 +49,7 @@
                     <span class="px-2 py-0.5 text-xs font-medium bg-gray-200 text-gray-700 dark:bg-gray-700 dark:text-gray-300 rounded-full">Retired</span>
                 {% elif not unit.deployed %}
                     <span class="px-2 py-0.5 text-xs font-medium bg-amber-100 text-amber-800 dark:bg-amber-900/30 dark:text-amber-300 rounded-full">Benched</span>
-                {% elif unit.measurement_state == "Start" %}
+                {% elif unit.measurement_state in ["Start", "Measure"] %}
                     <span class="px-2 py-0.5 text-xs font-medium bg-green-100 text-green-800 dark:bg-green-900/30 dark:text-green-300 rounded-full">Measuring</span>
                 {% elif unit.is_recent %}
                     <span class="px-2 py-0.5 text-xs font-medium bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-300 rounded-full">Active</span>
@@ -57,7 +57,9 @@
                     <span class="px-2 py-0.5 text-xs font-medium bg-yellow-100 text-yellow-800 dark:bg-yellow-900/30 dark:text-yellow-300 rounded-full">Idle</span>
                 {% endif %}
                 <span class="text-xs text-gray-500 dark:text-gray-400">
-                    {% if unit.slm_last_check %}
+                    {% if unit.cache_last_seen %}
+                        Last check: {{ unit.cache_last_seen|local_datetime }}
+                    {% elif unit.slm_last_check %}
                         Last check: {{ unit.slm_last_check|local_datetime }}
                     {% else %}
                         No recent check-in

templates/sound_level_meters.html

@@ -168,9 +168,18 @@ window.selectedUnitId = null;
 window.dashboardChartData = {
     timestamps: [],
     lp: [],
-    leq: []
+    leq: [],
+    ln1: [],
+    ln2: []
 };
 
+// Parse a metric to a number, or null (so a missing/"-.-" percentile leaves a gap
+// in the line instead of dropping it to 0).
+function numOrNull(v) {
+    const f = parseFloat(v);
+    return isNaN(f) ? null : f;
+}
+
 // Initialize Chart.js
 function initializeDashboardChart() {
     if (typeof Chart === 'undefined') {
@@ -212,6 +221,26 @@ function initializeDashboardChart() {
                     tension: 0.3,
                     borderWidth: 2,
                     pointRadius: 0
+                },
+                {
+                    label: 'L1',
+                    data: [],
+                    borderColor: 'rgb(168, 85, 247)',
+                    backgroundColor: 'rgba(168, 85, 247, 0.1)',
+                    tension: 0.3,
+                    borderWidth: 2,
+                    pointRadius: 0,
+                    spanGaps: true
+                },
+                {
+                    label: 'L10',
+                    data: [],
+                    borderColor: 'rgb(249, 115, 22)',
+                    backgroundColor: 'rgba(249, 115, 22, 0.1)',
+                    tension: 0.3,
+                    borderWidth: 2,
+                    pointRadius: 0,
+                    spanGaps: true
                 }
             ]
         },
@@ -263,11 +292,10 @@ function showLiveChart(unitId) {
     }
 
     // Reset data for the newly-selected unit (clears any prior unit's line)
-    window.dashboardChartData = { timestamps: [], lp: [], leq: [] };
+    window.dashboardChartData = { timestamps: [], lp: [], leq: [], ln1: [], ln2: [] };
     if (window.dashboardChart) {
         window.dashboardChart.data.labels = [];
-        window.dashboardChart.data.datasets[0].data = [];
+        window.dashboardChart.data.datasets.forEach(ds => ds.data = []);
-        window.dashboardChart.data.datasets[1].data = [];
         window.dashboardChart.update('none');
     }
 
@@ -366,22 +394,30 @@ function updateDashboardMetrics(data) {
 }
 
 function updateDashboardChart(data) {
+    const cd = window.dashboardChartData;
     const now = new Date();
-    window.dashboardChartData.timestamps.push(now.toLocaleTimeString());
+    cd.timestamps.push(now.toLocaleTimeString());
-    window.dashboardChartData.lp.push(parseFloat(data.lp || 0));
+    cd.lp.push(numOrNull(data.lp));
-    window.dashboardChartData.leq.push(parseFloat(data.leq || 0));
+    cd.leq.push(numOrNull(data.leq));
+    // /monitor (DOD) frames carry ln1/ln2; a DRD frame would omit them -> null gap.
+    cd.ln1.push(numOrNull(data.ln1));
+    cd.ln2.push(numOrNull(data.ln2));
 
     // Keep a generous window (backfill seeds up to ~120 points from the 2h trail).
-    if (window.dashboardChartData.timestamps.length > 600) {
+    if (cd.timestamps.length > 600) {
-        window.dashboardChartData.timestamps.shift();
+        cd.timestamps.shift();
-        window.dashboardChartData.lp.shift();
+        cd.lp.shift();
-        window.dashboardChartData.leq.shift();
+        cd.leq.shift();
+        cd.ln1.shift();
+        cd.ln2.shift();
     }
 
     if (window.dashboardChart) {
-        window.dashboardChart.data.labels = window.dashboardChartData.timestamps;
+        window.dashboardChart.data.labels = cd.timestamps;
-        window.dashboardChart.data.datasets[0].data = window.dashboardChartData.lp;
+        window.dashboardChart.data.datasets[0].data = cd.lp;
-        window.dashboardChart.data.datasets[1].data = window.dashboardChartData.leq;
+        window.dashboardChart.data.datasets[1].data = cd.leq;
+        window.dashboardChart.data.datasets[2].data = cd.ln1;
+        window.dashboardChart.data.datasets[3].data = cd.ln2;
         window.dashboardChart.update('none');
     }
 }
@@ -417,13 +453,17 @@ async function backfillDashboardChart(unitId) {
             // Trail timestamps are naive UTC; append 'Z' to render in local time
             // consistently with the live frames (which use local Date.now()).
             cd.timestamps.push(row.timestamp ? new Date(row.timestamp + 'Z').toLocaleTimeString() : '');
-            cd.lp.push(parseFloat(row.lp || 0));
+            cd.lp.push(numOrNull(row.lp));
-            cd.leq.push(parseFloat(row.leq || 0));
+            cd.leq.push(numOrNull(row.leq));
+            cd.ln1.push(numOrNull(row.ln1));
+            cd.ln2.push(numOrNull(row.ln2));
         }
         if (window.dashboardChart) {
             window.dashboardChart.data.labels = cd.timestamps;
             window.dashboardChart.data.datasets[0].data = cd.lp;
             window.dashboardChart.data.datasets[1].data = cd.leq;
+            window.dashboardChart.data.datasets[2].data = cd.ln1;
+            window.dashboardChart.data.datasets[3].data = cd.ln2;
             window.dashboardChart.update('none');
         }
     } catch (e) {