refactor: implement packet parsing heuristics and introduce device-level state caching to throttle database writes and vitals updates

2026-07-11 14:24:14 +05:30
parent a4972b3251
commit 84b8acc904
32 changed files with 3499 additions and 180 deletions
@@ -0,0 +1,49 @@
+import sys
+import struct
+sys.path.insert(0, "/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main")
+
+from contec_parser import parse_contec_binary_packet
+
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+i = 0
+pkts = []
+while i < len(stream) - 8:
+    if (stream[i + 2] == 0x04 or stream[i + 2] == 0x01) and stream[i + 3] == 0x46:
+        pkt_len = struct.unpack_from('<H', stream, i)[0]
+        if 30 < pkt_len < 1050 and i + pkt_len <= len(stream):
+            pkts.append(stream[i:i+pkt_len])
+        i += max(pkt_len, 4)
+    else:
+        i += 1
+
+print(f"Loaded {len(pkts)} packets.")
+
+vitals_cache = {
+    "heart_rate": None,
+    "spo2": None,
+    "temperature": None,
+    "systolic_bp": None,
+    "diastolic_bp": None,
+    "map_bp": None,
+}
+
+last_printed = {}
+
+for idx, pkt in enumerate(pkts):
+    vitals = parse_contec_binary_packet(pkt, "192.168.100.120")
+    if vitals:
+        # Merge like contec_server.py
+        changed = False
+        for field in vitals.present_fields or []:
+            val = getattr(vitals, field)
+            if vitals_cache[field] != val:
+                vitals_cache[field] = val
+                changed = True
+        
+        if changed:
+            current = {k: v for k, v in vitals_cache.items()}
+            if current != last_printed:
+                print(f"Pkt #{idx} (len={len(pkt)}) -> Cache: {current}")
+                last_printed = current