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 +1,51 @@
+import struct
+
+def search_scaled_values(p: bytes, val_sys: int, val_dia: int, val_map: int):
+    # We will search for scaled values: val, val * 10, val * 100
+    targets = [
+        (val_sys, "Sys"), (val_sys * 10, "Sys*10"), (val_sys * 100, "Sys*100"),
+        (val_dia, "Dia"), (val_dia * 10, "Dia*10"), (val_dia * 100, "Dia*100"),
+        (val_map, "Map"), (val_map * 10, "Map*10"), (val_map * 100, "Map*100")
+    ]
+    
+    for offset in range(len(p) - 1):
+        v = struct.unpack_from('<H', p, offset)[0]
+        for target_val, name in targets:
+            if v == target_val:
+                print(f"    Found {name} ({target_val}) at offset {offset}")
+
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+consumed = 0
+packets = []
+while consumed < len(stream) - 4:
+    b0, b1, b2, b3 = stream[consumed:consumed+4]
+    if (b2 == 0x04 or b2 == 0x01) and b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        packets.append(stream[consumed:consumed+pkt_len])
+        consumed += pkt_len
+    else:
+        consumed += 1
+
+print(f"Scanning {len(packets)} packets for scaled BP (108, 53, 75)...")
+for idx, p in enumerate(packets):
+    l = len(p)
+    subtype = p[6] if l > 6 else -1
+    
+    # We want to print only if something is found
+    # Redirect output internally
+    import io
+    import sys
+    old_stdout = sys.stdout
+    new_stdout = io.StringIO()
+    sys.stdout = new_stdout
+    
+    search_scaled_values(p, 108, 53, 75)
+    
+    output = new_stdout.getvalue()
+    sys.stdout = old_stdout
+    
+    if output.strip():
+        print(f"Packet #{idx} (Len={l}, Subtype={subtype}):")
+        print(output, end="")