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

fiveparaminte-main/scratch/analyze_logs.py

@@ -0,0 +1,39 @@
+import re
+import struct
+
+# Helper to read uint16 from bytes
+def read_u16_le(data: bytes, offset: int) -> int:
+    if offset + 2 > len(data):
+        return None
+    return struct.unpack_from('<H', data, offset)[0]
+
+# Read the log file
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/hl7_forwarder.log", "r") as f:
+    content = f.read()
+
+# Find all occurrences of Hex head logging
+hex_heads = re.findall(r"Raw hex \(first 32 bytes\): ([0-9a-fA-F]+)", content)
+warnings = re.findall(r"unrecognized. Len: (\d+), Hex head: ([0-9a-fA-F]+)", content)
+
+print(f"Found {len(hex_heads)} hex heads from server logging")
+print(f"Found {len(warnings)} unrecognized packet hex heads")
+
+# Also find all data packets printed or parsed in logs
+# Let's inspect some of the unrecognized packets of size 56 and 45
+print("\nSample of Len 56 packets:")
+count = 0
+for len_str, hex_str in warnings:
+    if len_str == "56":
+        print(f"  {hex_str}")
+        count += 1
+        if count >= 5:
+            break
+
+print("\nSample of Len 45 packets:")
+count = 0
+for len_str, hex_str in warnings:
+    if len_str == "45":
+        print(f"  {hex_str}")
+        count += 1
+        if count >= 5:
+            break