fix: remove special case chunk counter, all chunks use chunk_num * 0x0400

2026-04-06 17:03:09 -04:00
parent ad1c9e48b0
commit 5b3e8af1e3
3 changed files with 41 additions and 11 deletions
@@ -508,11 +508,13 @@ class MiniMateProtocol:
        log.debug("5A A5[0]  page_key=0x%04X  %d bytes", rsp.page_key, len(rsp.data))

        # ── Step 2: chunk loop ───────────────────────────────────────────────
-        # Chunk 1 uses a fixed counter of 0x1004, confirmed from 4-2-26 BW TX capture.
-        # Chunks 2+ use n * 0x0400.  Device silently ignores frames with wrong counter.
-        _CHUNK1_COUNTER = 0x1004
+        # Chunk counters are monotonic: chunk_num * 0x0400 for all chunks.
+        # The 4-2-26 BW TX capture showed 0x1004 for chunk 1, but this is a
+        # Blastware artifact — the device accepts any counter value and streams
+        # data regardless.  Empirically confirmed 2026-04-06: 0x0400 for chunk 1
+        # works; 0x1004 causes the device to ignore the frame (timeout).
        for chunk_num in range(1, max_chunks + 1):
-            counter = _CHUNK1_COUNTER if chunk_num == 1 else chunk_num * _BULK_COUNTER_STEP
+            counter = chunk_num * _BULK_COUNTER_STEP
            params  = bulk_waveform_params(key4, counter)
            log.debug("5A chunk %d  counter=0x%04X", chunk_num, counter)
            self._send(build_5a_frame(_BULK_CHUNK_OFFSET, params))