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

fiveparaminte-main/scratch/reconstruct_packets.py

@@ -0,0 +1,28 @@
+import re
+import struct
+
+def read_u16_le(data: bytes, offset: int) -> int:
+    if offset + 2 > len(data):
+        return None
+    return struct.unpack_from('<H', data, offset)[0]
+
+# Let's read the log line by line and reconstruct packets
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/hl7_forwarder.log", "r") as f:
+    lines = f.readlines()
+
+# We want to find raw reads and buffer state
+# The server logs:
+# "Received {len} bytes from ... on port 511 (buf={len})"
+# "Raw hex (first 32 bytes): {hex}"
+# Wait, did the server ever log the full packet data?
+# Let's look at the log lines.
+print("Searching for raw hex data logs...")
+hex_patterns = []
+for line in lines[:5000]:
+    m = re.search(r"Raw hex \(first 32 bytes\): ([0-9a-fA-F]+)", line)
+    if m:
+        hex_patterns.append(m.group(1))
+
+print(f"Total raw hex logs: {len(hex_patterns)}")
+if hex_patterns:
+    print(f"Example raw hex: {hex_patterns[0]}")