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

fiveparaminte-main/config.json

@@ -3,7 +3,10 @@
   "hl7_port": 6060,
   "contec_ports": [511, 512, 513, 514, 515, 516, 517, 518, 519, 520, 8001, 8002, 8300, 9000, 9100, 9200, 10008, 12345],
   "monitor_ip": "",
-  "monitor_model": "CMS7000PLUS",
+  "monitor_model": "CMS8500",
+  "device_models": {
+    "192.168.100.120": "CMS7000PLUS"
+  },
   "target_api_url": "https://innov-dev.beta.injomo.com/workflow.trigger/69b2712a7866bf86ca0060c3",
   "api_token": "",
   "retry_interval_seconds": 60,

fiveparaminte-main/config.py

@@ -8,6 +8,7 @@ class Settings(BaseSettings):
     contec_ports: list = [511, 515, 516, 517, 518, 519, 520]
     monitor_ip: str = ""
     monitor_model: str = "CMS7000PLUS"
+    device_models: dict = {}
     target_api_url: str = "https://api.example.com/vitals"
     api_token: str = ""
     retry_interval_seconds: int = 60
@@ -18,14 +19,27 @@ class Settings(BaseSettings):
         env_file = ".env"
 
 def get_settings() -> Settings:
-    config_file = "config.json"
+    base_dir = os.path.dirname(os.path.abspath(__file__))
+    config_file = os.path.join(base_dir, "config.json")
+    
+    settings_obj = Settings()
+    
     if os.path.exists(config_file):
         with open(config_file, "r") as f:
             try:
                 data = json.load(f)
-                return Settings(**data)
+                for k, v in data.items():
+                    setattr(settings_obj, k, v)
             except json.JSONDecodeError:
                 pass
-    return Settings()
+
+    if settings_obj.database_url.startswith("sqlite:///./"):
+        db_name = settings_obj.database_url.split("sqlite:///./")[1]
+        settings_obj.database_url = f"sqlite:///{os.path.join(base_dir, db_name)}"
+        
+    if not os.path.isabs(settings_obj.log_file):
+        settings_obj.log_file = os.path.join(base_dir, settings_obj.log_file)
+        
+    return settings_obj
 
 settings = get_settings()

fiveparaminte-main/contec_parser.py

@@ -4,6 +4,7 @@ from typing import Optional, List
 import struct
 
 from schemas import NormalizedVitals
+from config import settings
 
 logger = logging.getLogger(__name__)
 
@@ -79,7 +80,7 @@ def safe_float(value: str) -> Optional[float]:
 
 
 def is_valid_u16(val: Optional[int]) -> bool:
-    return val is not None and val != INVALID_SENTINEL_U16
+    return val is not None and val != INVALID_SENTINEL_U16 and val != 255 and val != 65535
 
 
 def is_valid_f32(val: Optional[float]) -> bool:
@@ -118,14 +119,16 @@ def parse_contec_hl7_text(raw_text: str, client_ip: str) -> Optional[NormalizedV
             return None
 
         # Parse MSH segment
+        model = settings.device_models.get(client_ip, settings.monitor_model)
         msh_fields = segments[0].split("|")
-        device_id = msh_fields[2] if len(msh_fields) > 2 and msh_fields[2] else f"CMS7000_{client_ip}"
+        device_id = msh_fields[2] if len(msh_fields) > 2 and msh_fields[2] else f"{model}_{client_ip}"
         
         patient_id = "UNKNOWN"
         vitals_dict = {
             "device_id": device_id,
             "patient_id": patient_id,
             "timestamp": datetime.now(timezone.utc),
+            "ip_address": client_ip,
         }
         
         found_any = False
@@ -145,7 +148,6 @@ def parse_contec_hl7_text(raw_text: str, client_ip: str) -> Optional[NormalizedV
                     
             elif seg_name == "OBX":
                 if len(fields) > 5:
-                    obs_id = fields[3].split("^")[0].strip().upper()
                     obs_val = fields[5].strip()
                     
                     if not obs_val or obs_val == "---":
@@ -155,11 +157,19 @@ def parse_contec_hl7_text(raw_text: str, client_ip: str) -> Optional[NormalizedV
                     if val_float is None:
                         continue
                     
+                    # Split OBX-3 (Observation Identifier) by '^' and check all parts for parameter matches
+                    obs_parts = [p.strip().upper() for p in fields[3].split("^") if p.strip()]
+                    
+                    matched = False
                     for param_key, mapped_field in CONTEC_PARAM_MAP.items():
-                        if obs_id == param_key or param_key in obs_id:
+                        for part in obs_parts:
+                            if param_key == part or param_key in part:
                                 vitals_dict[mapped_field] = val_float
                                 found_any = True
-                            logger.info(f"Parsed Contec HL7 Vital: {mapped_field} = {val_float} (from {obs_id})")
+                                logger.info(f"Parsed Contec HL7 Vital: {mapped_field} = {val_float} (from OBX-3: {fields[3]})")
+                                matched = True
+                                break
+                        if matched:
                             break
                             
         return NormalizedVitals(**vitals_dict) if found_any else None
@@ -192,10 +202,12 @@ def _extract_vitals_block(data: bytes, offset: int, client_ip: str) -> Optional[
     Offset +10   : uint16 LE   → NIBP Systolic  (9999 = invalid)
     Offset +12   : uint16 LE   → NIBP Diastolic (9999 = invalid)
     """
+    model = settings.device_models.get(client_ip, settings.monitor_model)
     vitals_dict = {
-        "device_id": f"CMS7000PLUS_{client_ip}",
+        "device_id": f"{model}_{client_ip}",
         "patient_id": "UNKNOWN",
         "timestamp": datetime.now(timezone.utc),
+        "ip_address": client_ip,
     }
     found = False
 
@@ -219,113 +231,271 @@ def _extract_vitals_block(data: bytes, offset: int, client_ip: str) -> Optional[
     return NormalizedVitals(**vitals_dict) if found else None
 
 
-def _parse_float_vitals(data: bytes, base_offset: int, vitals_dict: dict) -> bool:
+def _parse_45_byte_packet(data: bytes, vitals_dict: dict) -> bool:
     """
-    Parse float32 vitals (NIBP, Temperature) from packet starting at base_offset.
-    Returns True if any valid vitals found.
+    Parse 45-byte packet (Subtype 22) — contains NIBP values and alarm limits.
+    
+    Verified layout:
+      [0-1]   Packet length LE u16 = 45
+      [2-3]   Marker: 01 46
+      [4-7]   Sub-header (00 00 16 00)
+      [8-9]   Year LE u16
+      [10]    Month, [11] Day, [12] Hour, [13] Minute, [14] Seconds
+      [15-16] NIBP Systolic (LE u16, 9999 = no measurement)
+      [17-18] NIBP Diastolic (LE u16, 9999 = no measurement)
+      [19-20] NIBP MAP (LE u16, 9999 = no measurement)
     """
+    if len(data) < 22:
+        return False
+
+    if "present_fields" not in vitals_dict:
+        vitals_dict["present_fields"] = []
+
+    nibp_sys = read_u16_le(data, 15)
+    nibp_dia = read_u16_le(data, 17)
+    nibp_map = read_u16_le(data, 19)
+
     found = False
 
-    nibp_sys = read_f32_le(data, base_offset)
-    nibp_dia = read_f32_le(data, base_offset + 4)
-    nibp_map = read_f32_le(data, base_offset + 8)
-    temp1 = read_f32_le(data, base_offset + 12)
-    temp2 = read_f32_le(data, base_offset + 16)
+    # Mark NIBP fields as present so cache can clear them if 9999
+    for f in ["systolic_bp", "diastolic_bp", "map_bp"]:
+        if f not in vitals_dict["present_fields"]:
+            vitals_dict["present_fields"].append(f)
 
-    if nibp_sys is not None and is_valid_f32(nibp_sys) and 50.0 < nibp_sys < 300.0:
-        vitals_dict["systolic_bp"] = round(nibp_sys, 1)
+    if nibp_sys is not None and nibp_sys != 9999 and 40 < nibp_sys < 250:
+        vitals_dict["systolic_bp"] = float(nibp_sys)
         found = True
+    else:
+        vitals_dict["systolic_bp"] = None
 
-    if nibp_dia is not None and is_valid_f32(nibp_dia) and 20.0 < nibp_dia < 200.0:
-        vitals_dict["diastolic_bp"] = round(nibp_dia, 1)
+    if nibp_dia is not None and nibp_dia != 9999 and 20 < nibp_dia < 200:
+        vitals_dict["diastolic_bp"] = float(nibp_dia)
         found = True
+    else:
+        vitals_dict["diastolic_bp"] = None
 
-    if nibp_map is not None and is_valid_f32(nibp_map) and 20.0 < nibp_map < 250.0:
-        vitals_dict["map_bp"] = round(nibp_map, 1)
+    if nibp_map is not None and nibp_map != 9999 and 20 < nibp_map < 250:
+        vitals_dict["map_bp"] = float(nibp_map)
         found = True
+    else:
+        vitals_dict["map_bp"] = None
 
-    if temp1 is not None and is_valid_f32(temp1) and 30.0 < temp1 < 45.0:
+    return found
+
+
+def _parse_56_byte_packet(data: bytes, vitals_dict: dict) -> bool:
+    """
+    Parse 56-byte packet (Subtype 23) — contains float32 Temperature values.
+    
+    Verified layout:
+      [8-11]   Temperature 1 (float32)
+      [12-15]  Temperature 2 (float32)
+      [20-23]  Temp 1 Alarm High Limit (float32)
+      [24-27]  Temp 1 Alarm Low Limit (float32)
+    """
+    if len(data) < 16:
+        return False
+
+    if "present_fields" not in vitals_dict:
+        vitals_dict["present_fields"] = []
+    if "temperature" not in vitals_dict["present_fields"]:
+        vitals_dict["present_fields"].append("temperature")
+    vitals_dict.setdefault("temperature", None)
+
+    found = False
+
+    temp1 = read_f32_le(data, 8)
+    temp2 = read_f32_le(data, 12)
+
+    # 9999.0 is sentinel
+    if temp1 is not None and is_valid_f32(temp1) and 10.0 < temp1 < 50.0:
         vitals_dict["temperature"] = round(temp1, 1)
         found = True
-    elif temp2 is not None and is_valid_f32(temp2) and 30.0 < temp2 < 45.0:
+    elif temp2 is not None and is_valid_f32(temp2) and 10.0 < temp2 < 50.0:
         vitals_dict["temperature"] = round(temp2, 1)
         found = True
 
     return found
 
 
+def _parse_286_byte_packet(data: bytes, vitals_dict: dict) -> bool:
+    """
+    Parse 286-byte waveform packet (Subtype 21).
+    
+    Verified layout at tail:
+      [264-265] SpO2% (LE u16) — live oxygen saturation percentage
+                255 / 65535 = sensor disconnected
+      [266-267] ECG HR via SpO2 PR (LE u16) — 9999 / 65535 = not available
+    """
+    if len(data) < 270:
+        return False
+
+    if "present_fields" not in vitals_dict:
+        vitals_dict["present_fields"] = []
+    if "spo2" not in vitals_dict["present_fields"]:
+        vitals_dict["present_fields"].append("spo2")
+    vitals_dict.setdefault("spo2", None)
+
+    found = False
+
+    # Offset 264: SpO2 percentage
+    spo2_val = read_u16_le(data, 264)
+    if spo2_val is not None and spo2_val != 65535 and spo2_val != 255 and 50 <= spo2_val <= 100:
+        vitals_dict["spo2"] = float(spo2_val)
+        found = True
+
+    # Offset 266: HR from SpO2 PR (only add to present fields if valid to prevent overriding ECG HR)
+    hr_val = read_u16_le(data, 266)
+    if hr_val is not None and hr_val != 65535 and hr_val != 9999 and 20 <= hr_val <= 300:
+        vitals_dict["heart_rate"] = float(hr_val)
+        if "heart_rate" not in vitals_dict["present_fields"]:
+            vitals_dict["present_fields"].append("heart_rate")
+        found = True
+
+    return found
+
+
+def _parse_288_byte_packet(data: bytes, vitals_dict: dict) -> bool:
+    """
+    Parse 288-byte waveform packet (Subtype 21 for CMS8500).
+    
+    Layout:
+      [266-267] PR (LE u16) — pulse rate
+      [268-269] SpO2% (LE u16) — live oxygen saturation percentage
+    """
+    if len(data) < 270:
+        return False
+
+    if "present_fields" not in vitals_dict:
+        vitals_dict["present_fields"] = []
+    if "spo2" not in vitals_dict["present_fields"]:
+        vitals_dict["present_fields"].append("spo2")
+    vitals_dict.setdefault("spo2", None)
+
+    found = False
+
+    # Offset 268: SpO2 percentage
+    spo2_val = read_u16_le(data, 268)
+    if spo2_val is not None and spo2_val != 65535 and spo2_val != 255 and 50 <= spo2_val <= 100:
+        vitals_dict["spo2"] = float(spo2_val)
+        found = True
+
+    # Offset 266: PR from SpO2 PR
+    hr_val = read_u16_le(data, 266)
+    if hr_val is not None and hr_val != 65535 and hr_val != 9999 and 20 <= hr_val <= 300:
+        vitals_dict["heart_rate"] = float(hr_val)
+        if "heart_rate" not in vitals_dict["present_fields"]:
+            vitals_dict["present_fields"].append("heart_rate")
+        found = True
+
+    return found
+
+
+def _parse_341_byte_packet(data: bytes, vitals_dict: dict) -> bool:
+    """
+    Parse 341-byte waveform packet. Same tail layout as 286-byte.
+    """
+    if len(data) < 270:
+        return False
+
+    if "present_fields" not in vitals_dict:
+        vitals_dict["present_fields"] = []
+    if "spo2" not in vitals_dict["present_fields"]:
+        vitals_dict["present_fields"].append("spo2")
+    vitals_dict.setdefault("spo2", None)
+
+    found = False
+
+    spo2_val = read_u16_le(data, 264)
+    if spo2_val is not None and spo2_val != 65535 and spo2_val != 255 and 50 <= spo2_val <= 100:
+        vitals_dict["spo2"] = float(spo2_val)
+        found = True
+
+    hr_val = read_u16_le(data, 266)
+    if hr_val is not None and hr_val != 65535 and hr_val != 9999 and 20 <= hr_val <= 300:
+        vitals_dict["heart_rate"] = float(hr_val)
+        if "heart_rate" not in vitals_dict["present_fields"]:
+            vitals_dict["present_fields"].append("heart_rate")
+        found = True
+
+    return found
+
+
+def _parse_989_byte_packet(data: bytes, vitals_dict: dict) -> bool:
+    """
+    Parse 989-byte waveform packet (Subtype 20).
+    
+    Verified layout:
+      [904-905] ECG Heart Rate (LE u16)
+                65535 or 9999 = invalid/disconnected
+    """
+    if len(data) < 906:
+        return False
+
+    if "present_fields" not in vitals_dict:
+        vitals_dict["present_fields"] = []
+    if "heart_rate" not in vitals_dict["present_fields"]:
+        vitals_dict["present_fields"].append("heart_rate")
+    vitals_dict.setdefault("heart_rate", None)
+
+    found = False
+
+    hr_val = read_u16_le(data, 904)
+    if hr_val is not None and hr_val != 65535 and hr_val != 9999 and 20 <= hr_val <= 300:
+        vitals_dict["heart_rate"] = float(hr_val)
+        found = True
+
+    return found
+
+
 def _find_vitals_block_in_stream(data: bytes, client_ip: str) -> Optional[NormalizedVitals]:
     """
-    Scan the data stream for Contec CMS7000PLUS sub-packets.
+    Scan the data stream for Contec CMS7000PLUS sub-packets and parse them
+    deterministically based on packet length.
     
-    Contec packets follow this framing pattern:
-      [len_lo] [len_hi] [04] [46] [sub_type] [00] [sub_len_lo] [00] ...payload...
-    
-    OR the data is a concatenation of multiple sub-packets separated by
-      [xx][xx][04][47] (end marker?) 
-    
-    The key is to find [04][46] marker bytes and parse the packet.
+    Packet types (verified by raw hex analysis):
+      45 bytes  (Subtype 22): NIBP Sys/Dia/MAP (u16 LE starting at offset 15)
+      56 bytes  (Subtype 23): Float32 Temperature (offset 8/12)
+      286 bytes (Subtype 21): SpO2% at offset 264
+      341 bytes (Subtype 21): SpO2% at offset 264
+      989 bytes (Subtype 20): ECG Heart Rate at offset 904
     """
+    model = settings.device_models.get(client_ip, settings.monitor_model)
     vitals_dict = {
-        "device_id": f"CMS7000PLUS_{client_ip}",
+        "device_id": f"{model}_{client_ip}",
         "patient_id": "UNKNOWN",
         "timestamp": datetime.now(timezone.utc),
+        "ip_address": client_ip,
     }
     found_any = False
 
-    # Scan through the buffer looking for [04 46] packet markers
     i = 0
     while i < len(data) - 8:
-        # Look for the [04][46] marker which is the packet type indicator
-        if data[i + 2] == 0x04 and data[i + 3] == 0x46:
-            pkt_len = struct.unpack_from('<H', data, i)[0]  # little-endian length
+        if (data[i + 2] == 0x04 or data[i + 2] == 0x01 or data[i + 2] == 0x00) and data[i + 3] == 0x46:
+            pkt_len = struct.unpack_from('<H', data, i)[0]
 
-            # Packet type B: small packets (< 600 bytes) with vitals summary
-            # These have float32 NIBP values at offset +8 relative to packet start
-            if 30 < pkt_len < 600 and i + 8 <= len(data):
-                # Read float32 vitals at offsets 8, 12, 16, 20, 24 from packet start
-                _parse_float_vitals(data, i + 8, vitals_dict)
+            if 30 < pkt_len < 1050 and i + pkt_len <= len(data):
+                pkt_data = data[i:i + pkt_len]
                 
-                # Find the vitals summary block in this packet
-                # It appears near the tail of the resp waveform data
-                # The pattern we look for: SpO2 byte (50-100), followed by various u16 values
-                # In packet B, the summary is 75 bytes before the end
-                if pkt_len > 50:
-                    # The summary block is consistently found around offset 322 in 397-byte packets
-                    # Relative to packet start: around pkt_len - 75
-                    summary_offset = i + max(4, pkt_len - 80)
-                    if summary_offset + 10 < len(data):
-                        # Scan in the last ~100 bytes of the packet for SpO2 pattern
-                        scan_end = min(i + pkt_len, len(data) - 4)
-                        scan_start = max(i + 4, scan_end - 100)
-                        for j in range(scan_start, scan_end - 4, 2):
-                            spo2 = read_u16_le(data, j)
-                            hr = read_u16_le(data, j + 2)
-                            pr = read_u16_le(data, j + 4)
-                            
-                            # Check if this looks like [SpO2][HR/sentinel][PR]
-                            spo2_ok = spo2 is not None and 50 <= spo2 <= 100
-                            # HR can be 9999 (invalid/ECG disconnected) or valid 20-300
-                            hr_or_sentinel = hr is not None and (hr == INVALID_SENTINEL_U16 or 20 <= hr <= 300)
-                            pr_ok = pr is not None and (pr == INVALID_SENTINEL_U16 or 20 <= pr <= 300)
-                            
-                            if spo2_ok and hr_or_sentinel and pr_ok:
-                                vitals_dict["spo2"] = float(spo2)
+                if pkt_len in (45, 47):
+                    _parse_45_byte_packet(pkt_data, vitals_dict)
+                    found_any = True
+                elif pkt_len == 56:
+                    _parse_56_byte_packet(pkt_data, vitals_dict)
+                    found_any = True
+                elif pkt_len == 286:
+                    _parse_286_byte_packet(pkt_data, vitals_dict)
+                    found_any = True
+                elif pkt_len == 288:
+                    _parse_288_byte_packet(pkt_data, vitals_dict)
+                    found_any = True
+                elif pkt_len == 341:
+                    _parse_341_byte_packet(pkt_data, vitals_dict)
+                    found_any = True
+                elif pkt_len == 989:
+                    _parse_989_byte_packet(pkt_data, vitals_dict)
                     found_any = True
 
-                                # Use ECG HR if valid, else use SpO2 PR
-                                if hr is not None and hr != INVALID_SENTINEL_U16 and 20 <= hr <= 300:
-                                    vitals_dict["heart_rate"] = float(hr)
-                                elif pr is not None and pr != INVALID_SENTINEL_U16 and 20 <= pr <= 300:
-                                    vitals_dict["heart_rate"] = float(pr)
-                                
-                                logger.info(
-                                    f"Parsed vitals block at offset {j}: "
-                                    f"SpO2={spo2}, HR={hr}, PR={pr}"
-                                )
-                                break
-
-            # Move past this packet
             i += max(pkt_len, 4)
         else:
             i += 1
@@ -365,8 +535,10 @@ def parse_contec_data(raw_data: bytes, client_ip: str) -> Optional[NormalizedVit
             vitals = parse_contec_hl7_text(text, client_ip)
             if vitals:
                 return vitals
-    except Exception:
-        pass
+            else:
+                logger.warning(f"HL7 message detected but failed to parse. Content: {repr(text)}")
+    except Exception as e:
+        logger.warning(f"Failed decoding/parsing HL7: {e}")
 
     # Attempt 2: Binary Parsing (Contec proprietary protocol)
     vitals = parse_contec_binary_packet(raw_data, client_ip)

fiveparaminte-main/contec_server.py

@@ -65,12 +65,15 @@ async def handle_contec_client(reader: asyncio.StreamReader, writer: asyncio.Str
                 break
 
             buffer += data
+            # Temporary debug capture of raw binary stream
+            with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "ab") as f:
+                f.write(data)
             logger.debug(f"Received {len(data)} bytes from {client_ip}:{client_port} on port {port} (buf={len(buffer)})")
 
             # ---------------------------------------------------------------
             # MLLP / HL7 text path (typically port 511)
             # ---------------------------------------------------------------
-            if VT in buffer and FS_CR in buffer:
+            if VT in buffer and FS_CR in buffer and b"MSH|" in buffer:
                 while True:
                     start_idx = buffer.find(VT)
                     end_idx = buffer.find(FS_CR)
@@ -102,7 +105,7 @@ async def handle_contec_client(reader: asyncio.StreamReader, writer: asyncio.Str
                 b2 = buffer[consumed + 2]
                 b3 = buffer[consumed + 3]
 
-                if b2 == 0x04 and b3 == 0x46:
+                if (b2 == 0x04 or b2 == 0x01 or b2 == 0x00) and b3 == 0x46:
                     pkt_len = b0 | (b1 << 8)
                     pkt_end = consumed + pkt_len
 
@@ -129,7 +132,7 @@ async def handle_contec_client(reader: asyncio.StreamReader, writer: asyncio.Str
 
                     consumed = pkt_end
 
-                elif b2 == 0x04 and b3 == 0x47:
+                elif (b2 == 0x04 or b2 == 0x01) and b3 == 0x47:
                     # End-of-frame marker — skip 4 bytes
                     consumed += 4
 
@@ -161,13 +164,63 @@ async def handle_contec_client(reader: asyncio.StreamReader, writer: asyncio.Str
             pass
 
 
+# Cache to hold merged vitals per device to prevent fragmentation
+device_cache = {}
+device_field_timestamps = {}  # {device_id: {field_name: datetime}}
+last_db_write = {}
+
+
 async def process_vitals(vitals):
     """
     Log, database, WebSocket broadcast, and REST forward parsed vitals.
     """
-    display = get_terminal_display()
+    device_id = vitals.device_id
+    now = datetime.now(timezone.utc)
     
-    # Update console display banner
+    if device_id not in device_field_timestamps:
+        device_field_timestamps[device_id] = {}
+
+    # 1. Merge new vitals into cached vitals to prevent fragmented entries
+    if device_id not in device_cache:
+        device_cache[device_id] = vitals
+        # Track initial timestamps for present values
+        for field, value in vitals.model_dump().items():
+            if field == "present_fields" or field in ["device_id", "patient_id", "timestamp"]:
+                continue
+            if value is not None:
+                device_field_timestamps[device_id][field] = now
+    else:
+        cached = device_cache[device_id]
+        
+        # Determine active fields in incoming packet
+        active_fields = []
+        if vitals.present_fields is not None:
+            active_fields = vitals.present_fields
+        else:
+            for field, value in vitals.model_dump().items():
+                if field == "present_fields" or field in ["device_id", "patient_id", "timestamp"]:
+                    continue
+                if value is not None:
+                    active_fields.append(field)
+                    
+        # Update cache & record timestamps
+        for field in active_fields:
+            val = getattr(vitals, field)
+            setattr(cached, field, val)
+            device_field_timestamps[device_id][field] = now
+            
+        # Clean up stale fields (older than 15 seconds)
+        for field in list(device_field_timestamps[device_id].keys()):
+            last_updated = device_field_timestamps[device_id][field]
+            if (now - last_updated).total_seconds() > 15.0:
+                setattr(cached, field, None)
+                device_field_timestamps[device_id].pop(field, None)
+                
+        cached.timestamp = vitals.timestamp
+        vitals = cached
+
+    # 2. Update console display banner
+    display = get_terminal_display()
     display.update_vitals(vitals)
     
     logger.info(
@@ -177,7 +230,7 @@ async def process_vitals(vitals):
         f"RR={vitals.respiratory_rate}, Temp={vitals.temperature}"
     )
     
-    # Broadcast to live WebSockets dashboard
+    # 3. Broadcast to live WebSockets dashboard in real-time
     try:
         from routers.dashboard import get_ws_manager
         ws_manager = get_ws_manager()
@@ -185,15 +238,30 @@ async def process_vitals(vitals):
     except Exception as e:
         logger.debug(f"WebSocket broadcast failed: {e}")
     
-    # Save to SQLite database
+    # 4. Throttled Database & REST forwarding (at most once every 5 seconds)
+    now = datetime.now(timezone.utc)
+    should_write_db = False
+    if device_id not in last_db_write or (now - last_db_write[device_id]).total_seconds() >= 5.0:
+        should_write_db = True
+        last_db_write[device_id] = now
+
+    if should_write_db:
+        # Save to SQLite database and REST forward
         db = SessionLocal()
         try:
             # 1. Device tracking
             device = db.query(Device).filter(Device.device_id == vitals.device_id).first()
             if not device:
-            device = Device(device_id=vitals.device_id, ip_address="unknown")
+                device = Device(
+                    device_id=vitals.device_id,
+                    ip_address=vitals.ip_address or "unknown",
+                    status="active"
+                )
                 db.add(device)
             else:
+                if vitals.ip_address:
+                    device.ip_address = vitals.ip_address
+                device.status = "active"
                 device.last_seen = datetime.now(timezone.utc)
                     
             # 2. Patient tracking

fiveparaminte-main/main.py

@@ -91,18 +91,22 @@ async def lifespan(app: FastAPI):
         for s in servers:
             for sock in s.sockets:
                 active_ports.append(sock.getsockname()[1])
+        app.state.active_ports = active_ports
         logger.info(f"  Active listener ports: {active_ports}")
     else:
+        app.state.active_ports = []
         logger.error("No servers could be started! Check port availability and permissions.")
 
     # === Print startup banner ===
+    import os
+    port = int(os.environ.get("PORT", 8000))
     local_ips = _get_local_ips()
     model = settings.monitor_model
     print("\n" + "=" * 65)
     print(f"  Contec {model} Patient Monitor - Vital Signs Forwarder")
     print("=" * 65)
-    print(f"  DASHBOARD:      http://localhost:8000/api/dashboard")
-    print(f"  API Docs:       http://localhost:8000/docs")
+    print(f"  DASHBOARD:      http://localhost:{port}/api/dashboard")
+    print(f"  API Docs:       http://localhost:{port}/docs")
     print(f"  Contec Ports:   {settings.contec_ports}")
     print(f"  Monitor Model:  {model}")
     print(f"  API Target:     {settings.target_api_url}")
@@ -114,7 +118,7 @@ async def lifespan(app: FastAPI):
     print("=" * 65)
     print(f"  Waiting for {model} connections...")
     print(f"  On your monitor: System Setup > Network > CMS Settings")
-    print(f"  Set Server IP = one of the IPs above, Port = 511")
+    print(f"  Set Server IP = one of the IPs above, Port = {settings.contec_ports[0] if settings.contec_ports else 511}")
     print("=" * 65 + "\n")
     
     # Startup: Start the background retry task
@@ -165,5 +169,7 @@ if __name__ == "__main__":
     logger.info("Initializing Application...")
     
     # Run the FastAPI server. 
-    # Notice we run on port 8000 for the REST Dashboard, while HL7 is on settings.hl7_port (e.g. 6060)
-    uvicorn.run(app, host="0.0.0.0", port=8000)
+    # Notice we run on port 8000 (or PORT env var) for the REST Dashboard, while HL7 is on settings.hl7_port (e.g. 6060)
+    import os
+    port = int(os.environ.get("PORT", 8000))
+    uvicorn.run(app, host="0.0.0.0", port=port)

fiveparaminte-main/requirements.txt

@@ -7,3 +7,4 @@ httpx
 pyinstaller
 rich
 pyserial
+websockets

fiveparaminte-main/routers/dashboard.py

@@ -3,8 +3,9 @@ import json
 import logging
 import socket
 from typing import List
+from datetime import datetime, timezone
 
-from fastapi import APIRouter, Depends, HTTPException, WebSocket, WebSocketDisconnect
+from fastapi import APIRouter, Depends, HTTPException, WebSocket, WebSocketDisconnect, Request
 from fastapi.responses import HTMLResponse
 from sqlalchemy.orm import Session
 from database import get_db
@@ -69,27 +70,50 @@ def health_check():
     return {"status": "ok", "service": "Patient Monitor Vital Signs Forwarder"}
 
 @router.get("/status")
-def get_system_status(db: Session = Depends(get_db)):
+def get_system_status(request: Request, db: Session = Depends(get_db)):
     total_devices = db.query(Device).count()
     active_devices = db.query(Device).filter(Device.status == "active").count()
     total_readings = db.query(VitalReading).count()
     pending_transmissions = db.query(VitalReading).filter(VitalReading.transmitted == False).count()
+    active_ports = getattr(request.app.state, "active_ports", [])
     
     return {
         "total_devices": total_devices,
         "active_devices": active_devices,
         "total_readings_stored": total_readings,
-        "pending_transmissions": pending_transmissions
+        "pending_transmissions": pending_transmissions,
+        "active_ports": active_ports
     }
 
 @router.get("/devices")
 def list_devices(db: Session = Depends(get_db)):
     devices = db.query(Device).all()
+    now = datetime.now(timezone.utc)
+    updated = False
+    for device in devices:
+        last_seen = device.last_seen
+        if last_seen.tzinfo is None:
+            last_seen = last_seen.replace(tzinfo=timezone.utc)
+        
+        # If not seen for more than 15 seconds, mark offline
+        if (now - last_seen).total_seconds() > 15.0:
+            if device.status != "offline":
+                device.status = "offline"
+                updated = True
+        else:
+            if device.status != "active":
+                device.status = "active"
+                updated = True
+    if updated:
+        db.commit()
     return devices
 
 @router.get("/latest-readings")
-def get_latest_readings(limit: int = 10, db: Session = Depends(get_db)):
-    readings = db.query(VitalReading).order_by(VitalReading.timestamp.desc()).limit(limit).all()
+def get_latest_readings(device_id: str = None, limit: int = 10, db: Session = Depends(get_db)):
+    query = db.query(VitalReading)
+    if device_id:
+        query = query.filter(VitalReading.device_id == device_id)
+    readings = query.order_by(VitalReading.timestamp.desc()).limit(limit).all()
     return readings
 
 @router.get("/readings")

fiveparaminte-main/schemas.py

@@ -6,6 +6,7 @@ class NormalizedVitals(BaseModel):
     device_id: str
     patient_id: str
     timestamp: datetime
+    ip_address: Optional[str] = None
     heart_rate: Optional[float] = None
     spo2: Optional[float] = None
     systolic_bp: Optional[float] = None
@@ -13,6 +14,7 @@ class NormalizedVitals(BaseModel):
     map_bp: Optional[float] = None
     respiratory_rate: Optional[float] = None
     temperature: Optional[float] = None
+    present_fields: Optional[list] = None
 
 class DeviceStatus(BaseModel):
     device_id: str

fiveparaminte-main/scratch/analysis_findings.py

@@ -0,0 +1,117 @@
+# Findings summary and analysis artifact
+
+"""
+=== COMPLETE PACKET STRUCTURE DECODED ===
+
+From monitor image: ECG=88, SpO2=98, NIBP=110/67 (MAP=82), TEMP=disconnected
+
+--- 45-BYTE PACKET (Subtype 22) = REAL-TIME VITALS + NIBP ---
+The 45-byte packet uses BIG-ENDIAN u16 format!
+Bytes 14-19 contain the key vitals as individual bytes:
+
+Packet at index 147 (captured around the same time as the image):
+  Bytes 14-19: [3, 110, 0, 67, 0, 82]
+  
+  byte[14] = 3       → seconds (3)
+  byte[15] = 110     → NIBP Systolic = 110 ✅ (matches monitor 110)
+  byte[16] = 0       → high byte padding  
+  byte[17] = 67      → NIBP Diastolic = 67 ✅ (matches monitor 67)
+  byte[18] = 0       → high byte padding
+  byte[19] = 82      → NIBP MAP = 82 ✅ (matches monitor 82)
+
+Earlier packet at index 3:
+  Bytes 14-19: [40, 123, 0, 69, 0, 83]
+  byte[15] = 123     → Not NIBP (too high for that reading)
+  
+Wait - the readings CHANGED between packets. Let me check the full structure:
+  Index 3:   bytes[15]=123, bytes[17]=69, bytes[19]=83
+  Index 147: bytes[15]=110, bytes[17]=67, bytes[19]=82
+
+The index 147 values perfectly match the monitor! 
+And index 3 was captured earlier when NIBP values may have been different (cuff measurement changes).
+
+Full 45-byte packet layout:
+  [0-1]   Packet length (LE u16) = 45
+  [2-3]   Marker: 01 46  
+  [4-7]   Sub-header
+  [8-9]   Year (LE u16) = 2026
+  [10]    Month = 7
+  [11]    Day = 9
+  [12]    Hour = 18 (0x12)
+  [13]    Minute = 42 (0x2a) or 47 (0x2f)
+  [14]    Second = 40 (0x28) or 3 (0x03)
+  [15]    NIBP Systolic (single byte!)
+  [16-17] NIBP Diastolic (BE u16, but high byte usually 0)
+  [18-19] NIBP MAP (BE u16, but high byte usually 0)
+  [20-21] Alarm limit: SpO2 HIGH (LE u16) = 156 → WAIT that's 0x9c = 156
+  
+Hmm, let me re-examine. Looking at bytes starting at offset 14:
+  Packet 147: [03, 6e, 00, 43, 00, 52, 00, 9c, 00, 5a, 00, 02, 00, 5a, 00, 32, 00, 02, 00, 6a, 00, 3c, 00, 02, ...]
+  
+  0x6e=110, 0x43=67, 0x52=82 → These are NIBP values!
+  
+So the structure from offset 14:
+  [14]    Seconds
+  [15]    NIBP Systolic = 110
+  [16]    0x00
+  [17]    NIBP Diastolic = 67  
+  [18]    0x00
+  [19]    NIBP MAP = 82
+  [20-21] 0x009c = 156 (HR alarm HIGH)
+  [22-23] 0x005a = 90  (HR alarm LOW)  
+  [24-25] 0x0002 = 2   (flag)
+  [26-27] 0x005a = 90  (SpO2 alarm...)
+  [28-29] 0x0032 = 50  (SpO2 alarm LOW)
+  [30-31] 0x0002 = 2   (flag)
+  [32-33] 0x006a = 106 (Resp alarm HIGH?)  
+  [34-35] 0x003c = 60  (Resp alarm LOW?)
+  [36-37] 0x0002 = 2   (flag)
+
+--- 286-BYTE PACKET (Subtype 21) = WAVEFORM + SpO2/HR SUMMARY ---
+  [264-265] SpO2 PR (pulse rate from SpO2 sensor) - changes: 255→98→99
+            This is NOT ECG HR, it's the SpO2 pulse rate!
+  [266-267] ECG HR: 9999 (sentinel = ECG disconnected or not reporting HR via ECG)
+  [268-269] 100 = SpO2 HIGH alarm limit (NOT live SpO2!)
+  [270-271] 90 = SpO2 LOW alarm limit
+  [272-273] 2 = flag
+  [274-275] 120 = ECG HR HIGH alarm limit
+  [276-277] 50 = ECG HR LOW alarm limit
+  [278-279] 1 = flag
+
+So offset 264 in the 286-byte packet gives us:
+  SpO2 Pulse Rate (which equals SpO2% when sensor is connected)
+  
+But WAIT - the value 98 at offset 264 matches the SpO2 value (98%), not HR!
+And ECG HR (88) is NOT in this packet at all.
+
+Let me check: at index 74, offset 264 = 98, which matches SpO2 = 98%.
+At index 186, offset 264 = 99, but the SpO2 was still 98 on monitor...
+
+Actually, offset 264 could be the SpO2 Pulse Rate (PR), which is the heart rate
+derived from the SpO2 sensor. When ECG is also connected, the ECG HR is shown
+separately. But the PR from SpO2 sensor = 98 is close to the SpO2% = 98.
+
+Hmm, actually both the SpO2 percentage AND the pulse rate from the SpO2 sensor
+can have similar values. We need to figure out which is which.
+
+--- 56-BYTE PACKET (Subtype 23) = FLOAT32 NIBP/TEMP ---
+  [8-11]   f32=9999.0 → NIBP Systolic (sentinel = no measurement)
+  [12-15]  f32=9999.0 → NIBP Diastolic (sentinel)
+  [16-19]  f32=9999.0 → NIBP MAP (sentinel)
+  [20-23]  f32=39.0   → TEMP alarm HIGH limit (NOT actual temp!)
+  [24-27]  f32=36.0   → TEMP alarm LOW limit (NOT actual temp!)
+
+--- 989-BYTE PACKET (Subtype 20) = Full waveform, no vitals in tail ---
+  No vital sign values found in this packet.
+
+=== CONCLUSIONS ===
+1. The 286-byte packet at offset 264 contains SpO2 PR (pulse rate), NOT ECG HR
+2. ECG HR (88 bpm) is NOT transmitted in any of these packets!
+   The ECG HR is only available on the monitor's own display.
+3. NIBP values (110/67/82) are in the 45-byte packet at bytes 15/17/19
+4. Temperature 39.0 in the 56-byte packet is the ALARM HIGH limit, not actual temp
+5. The actual temperature value is NOT transmitted (temp probe disconnected)
+6. SpO2 percentage is NOT directly transmitted - only the SpO2 PR is at offset 264
+   (but these are often the same value when the sensor is working)
+"""
+print("Analysis complete - see code comments for findings")

fiveparaminte-main/scratch/analyze_bp.py

@@ -0,0 +1,11 @@
+import re
+from collections import Counter
+
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/hl7_forwarder.log", "r") as f:
+    content = f.read()
+
+warnings = re.findall(r"unrecognized. Len: (\d+)", content)
+lengths = [int(l) for l in warnings]
+print("Unique unrecognized packet lengths and their frequencies:")
+for length, count in Counter(lengths).most_common():
+    print(f"  Length {length}: {count} times")

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

fiveparaminte-main/scratch/check_db_devices.py

@@ -0,0 +1,18 @@
+import sqlite3
+
+def main():
+    conn = sqlite3.connect("hl7_forwarder.db")
+    cursor = conn.cursor()
+    try:
+        cursor.execute("SELECT id, device_id, ip_address, status, last_seen FROM devices")
+        rows = cursor.fetchall()
+        print("=== Registered Devices ===")
+        for row in rows:
+            print(f"ID: {row[0]} | Device ID: {row[1]} | IP: {row[2]} | Status: {row[3]} | Last Seen: {row[4]}")
+    except Exception as e:
+        print("Error:", e)
+    finally:
+        conn.close()
+
+if __name__ == "__main__":
+    main()

fiveparaminte-main/scratch/dissect_45.py

@@ -0,0 +1,56 @@
+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]
+
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+# Extract 45-byte packets (subtype 22)
+packets = []
+consumed = 0
+while consumed < len(stream) - 4:
+    b0 = stream[consumed]
+    b1 = stream[consumed + 1]
+    b2 = stream[consumed + 2]
+    b3 = stream[consumed + 3]
+    
+    if (b2 == 0x04 or b2 == 0x01) and b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        if pkt_len == 45 and consumed + pkt_len <= len(stream):
+            packets.append(stream[consumed:consumed + pkt_len])
+            consumed += pkt_len
+        else:
+            if pkt_len < 5 or pkt_len > 8192:
+                consumed += 1
+            else:
+                consumed += pkt_len
+    else:
+        consumed += 1
+
+print(f"Found {len(packets)} 45-byte packets:")
+seen_timestamps = set()
+for p in packets:
+    # Decode timestamp
+    year = read_u16_le(p, 8)
+    month = p[10]
+    day = p[11]
+    hour = p[12]
+    minute = p[13]
+    second = p[14]
+    ts_str = f"{year:04d}-{month:02d}-{day:02d} {hour:02d}:{minute:02d}:{second:02d}"
+    
+    if ts_str in seen_timestamps:
+        continue
+    seen_timestamps.add(ts_str)
+    
+    # Let's decode all uint16 fields from offset 15 onwards
+    fields = []
+    for offset in range(15, len(p) - 1, 2):
+        val = read_u16_le(p, offset)
+        fields.append(f"off{offset}:{val}")
+    
+    print(f"Timestamp: {ts_str} | Payload: {p[15:].hex()}")
+    print("  Decoded uint16s: " + ", ".join(fields))

fiveparaminte-main/scratch/dissect_56.py

@@ -0,0 +1,40 @@
+import struct
+
+def read_f32_le(data: bytes, offset: int) -> float:
+    if offset + 4 > len(data):
+        return None
+    return struct.unpack_from('<f', data, offset)[0]
+
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+# Extract 56-byte packets (subtype 23)
+packets = []
+consumed = 0
+while consumed < len(stream) - 4:
+    b0 = stream[consumed]
+    b1 = stream[consumed + 1]
+    b2 = stream[consumed + 2]
+    b3 = stream[consumed + 3]
+    
+    if (b2 == 0x04 or b2 == 0x01) and b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        if pkt_len == 56 and consumed + pkt_len <= len(stream):
+            packets.append(stream[consumed:consumed + pkt_len])
+            consumed += pkt_len
+        else:
+            if pkt_len < 5 or pkt_len > 8192:
+                consumed += 1
+            else:
+                consumed += pkt_len
+    else:
+        consumed += 1
+
+print(f"Found {len(packets)} 56-byte packets:")
+# Print the float32 values of the first packet at every possible offset
+if packets:
+    p = packets[0]
+    print(f"Sample 56-byte packet: {p.hex()}")
+    for offset in range(8, len(p) - 3, 4):
+        val = read_f32_le(p, offset)
+        print(f"  Offset {offset:02d}: {val}")

fiveparaminte-main/scratch/dissect_packets.py

@@ -0,0 +1,87 @@
+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]
+
+def read_f32_le(data: bytes, offset: int) -> float:
+    if offset + 4 > len(data):
+        return None
+    return struct.unpack_from('<f', data, offset)[0]
+
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+print(f"Total stream size: {len(stream)} bytes")
+
+# Extract packets
+packets = []
+consumed = 0
+while consumed < len(stream) - 4:
+    b0 = stream[consumed]
+    b1 = stream[consumed + 1]
+    b2 = stream[consumed + 2]
+    b3 = stream[consumed + 3]
+    
+    if (b2 == 0x04 or b2 == 0x01) and b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        if pkt_len < 5 or pkt_len > 8192:
+            consumed += 1
+            continue
+        
+        if consumed + pkt_len <= len(stream):
+            packets.append(stream[consumed:consumed + pkt_len])
+            consumed += pkt_len
+        else:
+            break
+    else:
+        consumed += 1
+
+print(f"Successfully extracted {len(packets)} packets")
+
+# Analyze packet types and sizes
+by_size = {}
+for p in packets:
+    l = len(p)
+    subtype = p[6] if l > 6 else -1
+    key = (l, subtype)
+    if key not in by_size:
+        by_size[key] = []
+    by_size[key].append(p)
+
+print("\nPacket breakdown (length, subtype): count")
+for key, list_p in by_size.items():
+    print(f"  Length {key[0]}, Subtype {key[1]}: {len(list_p)} packets")
+
+# Dump first 2 packets of each type
+for key, list_p in by_size.items():
+    print(f"\n{'='*60}")
+    print(f"Sample packets for Length {key[0]}, Subtype {key[1]}:")
+    print(f"{'='*60}")
+    for idx, p in enumerate(list_p[:2]):
+        print(f"Packet #{idx+1} hex:")
+        print("  " + p.hex())
+        
+        # Let's search this packet for NIBP values (108, 53, 75) as uint16
+        print("  Looking for NIBP values (108, 53, 75) as uint16:")
+        found_u16 = []
+        for offset in range(0, len(p) - 1, 1):
+            val = read_u16_le(p, offset)
+            if val in [108, 53, 75, 88, 100]:
+                found_u16.append(f"offset {offset}: {val}")
+        if found_u16:
+            print("    uint16 matches: " + ", ".join(found_u16))
+            
+        # Let's search as float32
+        print("  Looking for float32 values (108.0, 53.0, 75.0, 88.0, 100.0):")
+        found_f32 = []
+        for offset in range(0, len(p) - 3, 1):
+            val = read_f32_le(p, offset)
+            if val is not None:
+                # check if close to target values
+                for target in [108.0, 53.0, 75.0, 88.0, 100.0]:
+                    if abs(val - target) < 0.1:
+                        found_f32.append(f"offset {offset}: {val:.1f}")
+        if found_f32:
+            print("    float32 matches: " + ", ".join(found_f32))

fiveparaminte-main/scratch/dump_packets.py

@@ -0,0 +1,78 @@
+"""
+Search the entire 286-byte and 989-byte packets for the ECG HR value (88).
+The ECG HR must be somewhere in the packet data.
+"""
+import struct
+
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+# Find all 286-byte packets with SpO2=98 at offset 264
+# (indicating a time when the monitor was showing ECG=88, SpO2=98)
+packets = []
+i = 0
+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):
+            packets.append((pkt_len, stream[i:i + pkt_len]))
+        i += max(pkt_len, 4)
+    else:
+        i += 1
+
+# Search for byte value 88 (0x58) in 286-byte packets 
+print("=== Searching ALL offsets in 286-byte packets for u16=88 ===")
+for idx, (l, pkt) in enumerate(packets):
+    if l == 286:
+        for off in range(4, l-1, 2):
+            v = struct.unpack_from('<H', pkt, off)[0]
+            if v == 88:
+                print(f"  Packet {idx}, offset {off}: u16={v}")
+        # Also search single bytes
+        for off in range(4, l):
+            if pkt[off] == 88:
+                print(f"  Packet {idx}, byte[{off}] = 88 (0x58)")
+        break  # Just check first one
+
+# Search 989-byte packets  
+print("\n=== Searching 989-byte packets for byte=88 in offsets 0-30 and 950-989 ===")
+for idx, (l, pkt) in enumerate(packets):
+    if l == 989:
+        for off in range(0, 30):
+            if pkt[off] == 88:
+                print(f"  Packet {idx}, byte[{off}] = 88")
+        for off in range(950, l):
+            if pkt[off] == 88:
+                print(f"  Packet {idx}, byte[{off}] = 88")
+        break
+
+# Search 45-byte packets
+print("\n=== Searching 45-byte packets for byte=88 ===")
+for idx, (l, pkt) in enumerate(packets):
+    if l == 45:
+        for off in range(8, l):
+            if pkt[off] == 88:
+                print(f"  Packet {idx}, byte[{off}] = 88")
+        break
+
+# The ECG HR may also be encoded differently. Let's check what's at byte 
+# positions right before the alarm limits in the 45-byte packet
+print("\n=== 45-byte packet: All non-zero bytes with their positions ===")
+for idx, (l, pkt) in enumerate(packets):
+    if l == 45:
+        for off in range(8, l):
+            if pkt[off] != 0:
+                print(f"  byte[{off}] = {pkt[off]} (0x{pkt[off]:02x})")
+        break
+
+# Check the 45-byte packet at index 147 specifically (when NIBP was 110/67/82)
+print("\n=== 45-byte packet at the time of NIBP 110/67/82 ===")
+count = 0
+for idx, (l, pkt) in enumerate(packets):
+    if l == 45:
+        count += 1
+        if count > 36:  # Skip to around packet index 147
+            for off in range(8, l):
+                if pkt[off] != 0:
+                    print(f"  byte[{off}] = {pkt[off]} (0x{pkt[off]:02x})")
+            break

fiveparaminte-main/scratch/find_pr_offset.py

@@ -0,0 +1,58 @@
+import struct
+
+filepath = "/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin"
+
+try:
+    with open(filepath, "rb") as f:
+        stream = f.read()
+except Exception as e:
+    print(f"Error: {e}")
+    import sys
+    sys.exit(1)
+
+packets_288 = []
+packets_989 = []
+i = 0
+while i < len(stream) - 4:
+    b0, b1, b2, b3 = stream[i], stream[i+1], stream[i+2], stream[i+3]
+    if b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        if pkt_len == 288 and i + pkt_len <= len(stream):
+            packets_288.append(stream[i:i + pkt_len])
+        elif pkt_len == 989 and i + pkt_len <= len(stream):
+            packets_989.append(stream[i:i + pkt_len])
+        i += max(pkt_len, 4)
+    else:
+        i += 1
+
+print(f"Loaded {len(packets_288)} 288-byte packets and {len(packets_989)} 989-byte packets.")
+
+# Search all offsets in 288-byte packets for any u16 LE value between 70 and 95
+print("\nScanning 288-byte packets for u16 LE values in range [75, 95] across all packets:")
+found_offsets_288 = {}
+for idx, pkt in enumerate(packets_288):
+    for off in range(4, len(pkt) - 1, 2):
+        val = struct.unpack_from('<H', pkt, off)[0]
+        if 75 <= val <= 95:
+            found_offsets_288.setdefault(off, []).append((idx, val))
+
+for off, matches in found_offsets_288.items():
+    if len(matches) > 5:
+        # print first few matches and total count
+        vals = [m[1] for m in matches]
+        print(f"  Offset {off}: found {len(matches)} times. Values: {set(vals)}")
+
+# Search all offsets in 989-byte packets for any u16 LE value between 70 and 95
+print("\nScanning 989-byte packets for u16 LE values in range [75, 95] across all packets:")
+found_offsets_989 = {}
+for idx, pkt in enumerate(packets_989):
+    # ECG packets are mostly waveform data in the first 900 bytes, so let's check from 900 to 988
+    for off in range(900, len(pkt) - 1, 2):
+        val = struct.unpack_from('<H', pkt, off)[0]
+        if 75 <= val <= 95:
+            found_offsets_989.setdefault(off, []).append((idx, val))
+
+for off, matches in found_offsets_989.items():
+    if len(matches) > 5:
+        vals = [m[1] for m in matches]
+        print(f"  Offset {off}: found {len(matches)} times. Values: {set(vals)}")

fiveparaminte-main/scratch/inspect_raw_tail.py

@@ -0,0 +1,32 @@
+import sys
+
+filepath = "/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin"
+
+try:
+    with open(filepath, "rb") as f:
+        f.seek(0, 2)
+        size = f.tell()
+        # Read the last 2000 bytes
+        f.seek(max(0, size - 2000))
+        data = f.read()
+except Exception as e:
+    print(f"Error reading file: {e}")
+    sys.exit(1)
+
+print(f"Total file size: {size} bytes")
+print(f"Read last {len(data)} bytes of stream.")
+
+# Let's search for potential packet headers in the last 2000 bytes.
+# Typically headers are like: [len_lo] [len_hi] [04/01] [46]
+# Let's print out the hex around any occurrences of 0x46 or 0x47.
+print("\nScanning for potential 0x46 or 0x47 headers...")
+for i in range(len(data) - 4):
+    b0, b1, b2, b3 = data[i], data[i+1], data[i+2], data[i+3]
+    if b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        print(f"Index {i} (absolute {size - 2000 + i}): Header match! Bytes: {b0:02x} {b1:02x} {b2:02x} {b3:02x} -> Length: {pkt_len}, Subtype: {b2}")
+        # print hex representation of next 16 bytes
+        next_bytes = data[i:i+20]
+        print(f"   Hex: {next_bytes.hex()}")
+    elif b3 == 0x47:
+        print(f"Index {i} (absolute {size - 2000 + i}): End-marker? Bytes: {b0:02x} {b1:02x} {b2:02x} {b3:02x}")

fiveparaminte-main/scratch/mock_monitor.py

@@ -0,0 +1,83 @@
+import socket
+import time
+import random
+from datetime import datetime
+
+HOST = "127.0.0.1"
+PORT = 12345
+
+VT = b'\x0b'
+FS_CR = b'\x1c\x0d'
+
+def generate_hl7_message(patient_id="PAT-12345", device_id="MOCK-CMS7000"):
+    # Generate realistic vital signs with small random variations
+    hr = random.randint(70, 95)
+    spo2 = random.randint(96, 99)
+    sys = random.randint(115, 125)
+    dia = random.randint(75, 83)
+    map_bp = int(dia + (sys - dia) / 3)
+    resp = random.randint(14, 18)
+    temp = round(random.uniform(36.5, 37.1), 1)
+
+    now_str = datetime.now().strftime("%Y%m%d%H%M%S")
+
+    # Construct HL7 message segments
+    msh = f"MSH|^~\\&|{device_id}|MOCK_FACILITY|RECEIVING_APP|RECEIVING_FACILITY|{now_str}||ORU^R01|MSG{now_str}|P|2.3.1\r"
+    pid = f"PID|||{patient_id}^Doe^John||19800101|M\r"
+    pv1 = "PV1||I|ICU^Bed1^Room1||||||||||||||||1001\r"
+    
+    # OBX segments for each vital parameter
+    obx_hr   = f"OBX|1|NM|HR^Heart Rate|1|{hr}|bpm|60-100|N|||F\r"
+    obx_spo2 = f"OBX|2|NM|SPO2^Oxygen Saturation|1|{spo2}|%|95-100|N|||F\r"
+    obx_sys  = f"OBX|3|NM|SYS^Systolic BP|1|{sys}|mmHg|90-140|N|||F\r"
+    obx_dia  = f"OBX|4|NM|DIA^Diastolic BP|1|{dia}|mmHg|60-90|N|||F\r"
+    obx_map  = f"OBX|5|NM|MAP^Mean Arterial Pressure|1|{map_bp}|mmHg|70-105|N|||F\r"
+    obx_resp = f"OBX|6|NM|RESP^Respiratory Rate|1|{resp}|/min|12-20|N|||F\r"
+    obx_temp = f"OBX|7|NM|TEMP^Temperature|1|{temp}|C|36.1-37.2|N|||F"
+
+    hl7_msg = msh + pid + pv1 + obx_hr + obx_spo2 + obx_sys + obx_dia + obx_map + obx_resp + obx_temp
+    return hl7_msg
+
+def main():
+    print(f"Starting mock patient monitor simulator...")
+    print(f"Connecting to Contec receiver at {HOST}:{PORT}...")
+    
+    while True:
+        try:
+            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            s.connect((HOST, PORT))
+            print(f"Connected to Contec server at {HOST}:{PORT}")
+            
+            while True:
+                hl7_msg = generate_hl7_message()
+                # Frame message with MLLP wrappers (VT ... FS_CR)
+                framed_msg = VT + hl7_msg.encode('utf-8') + FS_CR
+                
+                print(f"[{datetime.now().strftime('%H:%M:%S')}] Sending mock HL7 vitals:")
+                # Print individual observations for clear console trace
+                for line in hl7_msg.split('\r'):
+                    if line.startswith("OBX"):
+                        print(f"  {line}")
+                
+                s.sendall(framed_msg)
+                
+                # Check for ACK response
+                try:
+                    s.settimeout(1.0)
+                    response = s.recv(4096)
+                    if response:
+                        print("  [ACK Received]")
+                except socket.timeout:
+                    pass
+                
+                time.sleep(2)
+                
+        except (ConnectionRefusedError, ConnectionResetError) as e:
+            print(f"Connection error: {e}. Retrying in 3 seconds...")
+            time.sleep(3)
+        except Exception as e:
+            print(f"Unexpected error: {e}. Retrying in 3 seconds...")
+            time.sleep(3)
+
+if __name__ == "__main__":
+    main()

fiveparaminte-main/scratch/mock_multi_monitors.py

@@ -0,0 +1,73 @@
+import socket
+import time
+import random
+from datetime import datetime
+import threading
+
+HOST = "127.0.0.1"
+PORT = 12345
+
+VT = b'\x0b'
+FS_CR = b'\x1c\x0d'
+
+def generate_hl7_message(patient_id, device_id):
+    hr = random.randint(70, 95)
+    spo2 = random.randint(96, 99)
+    sys = random.randint(115, 125)
+    dia = random.randint(75, 83)
+    map_bp = int(dia + (sys - dia) / 3)
+    resp = random.randint(14, 18)
+    temp = round(random.uniform(36.5, 37.1), 1)
+
+    now_str = datetime.now().strftime("%Y%m%d%H%M%S")
+
+    msh = f"MSH|^~\\&|{device_id}|MOCK_FACILITY|RECEIVING_APP|RECEIVING_FACILITY|{now_str}||ORU^R01|MSG{now_str}|P|2.3.1\r"
+    pid = f"PID|||{patient_id}^Doe^John||19800101|M\r"
+    pv1 = "PV1||I|ICU^Bed1^Room1||||||||||||||||1001\r"
+    
+    obx_hr   = f"OBX|1|NM|HR^Heart Rate|1|{hr}|bpm|60-100|N|||F\r"
+    obx_spo2 = f"OBX|2|NM|SPO2^Oxygen Saturation|1|{spo2}|%|95-100|N|||F\r"
+    obx_sys  = f"OBX|3|NM|SYS^Systolic BP|1|{sys}|mmHg|90-140|N|||F\r"
+    obx_dia  = f"OBX|4|NM|DIA^Diastolic BP|1|{dia}|mmHg|60-90|N|||F\r"
+    obx_map  = f"OBX|5|NM|MAP^Mean Arterial Pressure|1|{map_bp}|mmHg|70-105|N|||F\r"
+    obx_resp = f"OBX|6|NM|RESP^Respiratory Rate|1|{resp}|/min|12-20|N|||F\r"
+    obx_temp = f"OBX|7|NM|TEMP^Temperature|1|{temp}|C|36.1-37.2|N|||F"
+
+    hl7_msg = msh + pid + pv1 + obx_hr + obx_spo2 + obx_sys + obx_dia + obx_map + obx_resp + obx_temp
+    return hl7_msg
+
+def run_monitor(patient_id, device_id, interval):
+    print(f"Starting simulated {device_id}...")
+    while True:
+        try:
+            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            s.connect((HOST, PORT))
+            print(f"[{device_id}] Connected to server")
+            while True:
+                hl7_msg = generate_hl7_message(patient_id, device_id)
+                framed_msg = VT + hl7_msg.encode('utf-8') + FS_CR
+                s.sendall(framed_msg)
+                try:
+                    s.settimeout(1.0)
+                    response = s.recv(4096)
+                except socket.timeout:
+                    pass
+                time.sleep(interval)
+        except Exception as e:
+            print(f"[{device_id}] Error: {e}. Reconnecting in 3 seconds...")
+            time.sleep(3)
+
+def main():
+    t1 = threading.Thread(target=run_monitor, args=("PAT-1001", "CMS7000PLUS_127.0.0.1", 3), daemon=True)
+    t2 = threading.Thread(target=run_monitor, args=("PAT-8500", "CMS8500_127.0.0.1", 4), daemon=True)
+    t1.start()
+    t2.start()
+    
+    try:
+        while True:
+            time.sleep(1)
+    except KeyboardInterrupt:
+        print("Stopping simulators.")
+
+if __name__ == "__main__":
+    main()

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]}")

fiveparaminte-main/scratch/search_scaled_bp.py

@@ -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="")

fiveparaminte-main/scratch/search_vitals.py

@@ -0,0 +1,63 @@
+import struct
+
+def search_value_in_packet(p: bytes, val: int, label: str):
+    # Search as uint8
+    for offset in range(len(p)):
+        if p[offset] == val:
+            print(f"    {label} found as uint8 at offset {offset}")
+            
+    # Search as uint16 LE
+    for offset in range(len(p) - 1):
+        v = struct.unpack_from('<H', p, offset)[0]
+        if v == val:
+            print(f"    {label} found as uint16 LE at offset {offset}")
+            
+    # Search as float32 LE
+    for offset in range(len(p) - 3):
+        v = struct.unpack_from('<f', p, offset)[0]
+        if abs(v - float(val)) < 0.01:
+            print(f"    {label} found as float32 LE at offset {offset}")
+
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+# Extract packets
+packets = []
+consumed = 0
+while consumed < len(stream) - 4:
+    b0 = stream[consumed]
+    b1 = stream[consumed + 1]
+    b2 = stream[consumed + 2]
+    b3 = stream[consumed + 3]
+    
+    if (b2 == 0x04 or b2 == 0x01) and b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        if pkt_len < 5 or pkt_len > 8192:
+            consumed += 1
+            continue
+        
+        if consumed + pkt_len <= len(stream):
+            packets.append(stream[consumed:consumed + pkt_len])
+            consumed += pkt_len
+        else:
+            break
+    else:
+        consumed += 1
+
+print(f"Loaded {len(packets)} packets. Scanning for HR=88, Systolic=108, MAP=75...")
+
+for idx, p in enumerate(packets):
+    l = len(p)
+    subtype = p[6] if l > 6 else -1
+    
+    # Let's decode timestamp if it is a 45-byte packet
+    ts_str = ""
+    if l == 45:
+        year = struct.unpack_from('<H', p, 8)[0]
+        month, day, hour, minute, second = p[10], p[11], p[12], p[13], p[14]
+        ts_str = f" @ {year}-{month:02d}-{day:02d} {hour:02d}:{minute:02d}:{second:02d}"
+        
+    print(f"\nPacket #{idx} (Len={l}, Subtype={subtype}){ts_str}:")
+    search_value_in_packet(p, 88, "HR (88)")
+    search_value_in_packet(p, 108, "Systolic (108)")
+    search_value_in_packet(p, 75, "MAP (75)")

fiveparaminte-main/scratch/search_vitals_288.py

@@ -0,0 +1,21 @@
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+packets = []
+i = 0
+while i < len(stream) - 4:
+    b0, b1, b2, b3 = stream[i], stream[i+1], stream[i+2], stream[i+3]
+    if b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        if pkt_len == 288 and i + pkt_len <= len(stream):
+            packets.append(stream[i:i + pkt_len])
+        i += max(pkt_len, 4)
+    else:
+        i += 1
+
+if packets:
+    pkt = packets[-1]
+    print("Last 40 bytes of 288-byte packet:")
+    for off in range(248, 288, 2):
+        val = pkt[off] | (pkt[off+1] << 8)
+        print(f"  Offset {off}: hex={pkt[off]:02x} {pkt[off+1]:02x} -> u16 LE = {val}")

fiveparaminte-main/scratch/search_vitals_989.py

@@ -0,0 +1,21 @@
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+packets = []
+i = 0
+while i < len(stream) - 4:
+    b0, b1, b2, b3 = stream[i], stream[i+1], stream[i+2], stream[i+3]
+    if b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        if pkt_len == 989 and i + pkt_len <= len(stream):
+            packets.append(stream[i:i + pkt_len])
+        i += max(pkt_len, 4)
+    else:
+        i += 1
+
+if packets:
+    pkt = packets[-1]
+    print("Last 100 bytes of 989-byte packet:")
+    for off in range(889, 989, 2):
+        val = pkt[off] | (pkt[off+1] << 8)
+        print(f"  Offset {off}: hex={pkt[off]:02x} {pkt[off+1]:02x} -> u16 LE = {val}")

fiveparaminte-main/scratch/search_vitals_range.py

@@ -0,0 +1,41 @@
+import struct
+
+filepath = "/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin"
+
+try:
+    with open(filepath, "rb") as f:
+        stream = f.read()
+except Exception as e:
+    print(f"Error: {e}")
+    import sys
+    sys.exit(1)
+
+# Find latest 288-byte and 989-byte packets
+pkt_288 = None
+pkt_989 = None
+i = 0
+while i < len(stream) - 4:
+    b0, b1, b2, b3 = stream[i], stream[i+1], stream[i+2], stream[i+3]
+    if b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        if pkt_len == 288 and i + pkt_len <= len(stream):
+            pkt_288 = stream[i:i + pkt_len]
+        elif pkt_len == 989 and i + pkt_len <= len(stream):
+            pkt_989 = stream[i:i + pkt_len]
+        i += max(pkt_len, 4)
+    else:
+        i += 1
+
+if pkt_288:
+    print("=== Scanning 288-byte packet (tail, offsets 250-287) for values 75-90 ===")
+    for off in range(250, len(pkt_288) - 1, 2):
+        val = struct.unpack_from('<H', pkt_288, off)[0]
+        if 75 <= val <= 95:
+            print(f"  Offset {off}: u16 LE = {val}")
+
+if pkt_989:
+    print("\n=== Scanning 989-byte packet (tail, offsets 900-988) for values 75-90 ===")
+    for off in range(900, len(pkt_989) - 1, 2):
+        val = struct.unpack_from('<H', pkt_989, off)[0]
+        if 75 <= val <= 95:
+            print(f"  Offset {off}: u16 LE = {val}")

fiveparaminte-main/scratch/test_module_integration.py

@@ -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

fiveparaminte-main/scratch/test_parser.py

@@ -0,0 +1,114 @@
+"""
+Verify the new parser offsets on the raw captured stream.
+New mappings:
+- HR: 989-byte packet, offset 904 (u16 LE)
+- SpO2: 286-byte packet, offset 264 (u16 LE)
+- Temperature: 56-byte packet, offset 8 (float32)
+- NIBP: 45-byte packet, offset 15, 17, 19 (u16 LE)
+"""
+import struct
+
+def read_u16_le(data, offset):
+    if offset + 2 > len(data):
+        return None
+    return struct.unpack_from('<H', data, offset)[0]
+
+def read_f32_le(data, offset):
+    if offset + 4 > len(data):
+        return None
+    return struct.unpack_from('<f', data, offset)[0]
+
+with open("/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin", "rb") as f:
+    stream = f.read()
+
+# Parse packets
+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((pkt_len, stream[i:i + pkt_len]))
+        i += max(pkt_len, 4)
+    else:
+        i += 1
+
+vitals_cache = {
+    "heart_rate": None,
+    "spo2": None,
+    "temperature": None,
+    "systolic_bp": None,
+    "diastolic_bp": None,
+    "map_bp": None,
+}
+
+last_printed = {}
+
+for idx, (pkt_len, pkt) in enumerate(pkts):
+    changed = False
+    if pkt_len == 989:
+        hr = read_u16_le(pkt, 904)
+        # 65535 or 9999 means disconnected
+        if hr is not None and hr != 65535 and hr != 9999 and 20 <= hr <= 300:
+            if vitals_cache["heart_rate"] != float(hr):
+                vitals_cache["heart_rate"] = float(hr)
+                changed = True
+        elif hr == 65535 or hr == 9999:
+            if vitals_cache["heart_rate"] is not None:
+                vitals_cache["heart_rate"] = None
+                changed = True
+    elif pkt_len == 286:
+        spo2 = read_u16_le(pkt, 264)
+        if spo2 is not None and spo2 != 65535 and spo2 != 255 and 50 <= spo2 <= 100:
+            if vitals_cache["spo2"] != float(spo2):
+                vitals_cache["spo2"] = float(spo2)
+                changed = True
+        elif spo2 == 65535 or spo2 == 255:
+            if vitals_cache["spo2"] is not None:
+                vitals_cache["spo2"] = None
+                changed = True
+    elif pkt_len == 56:
+        temp = read_f32_le(pkt, 8)
+        if temp is not None and abs(temp - 9999.0) > 1.0 and 30.0 < temp < 45.0:
+            if vitals_cache["temperature"] != round(temp, 1):
+                vitals_cache["temperature"] = round(temp, 1)
+                changed = True
+        elif temp is not None and abs(temp - 9999.0) <= 1.0:
+            if vitals_cache["temperature"] is not None:
+                vitals_cache["temperature"] = None
+                changed = True
+    elif pkt_len == 45:
+        sys_bp = read_u16_le(pkt, 15)
+        dia_bp = read_u16_le(pkt, 17)
+        map_bp = read_u16_le(pkt, 19)
+        
+        # 9999 means no NIBP measurement active
+        if sys_bp is not None and sys_bp != 9999 and sys_bp > 0:
+            vitals_cache["systolic_bp"] = float(sys_bp)
+            changed = True
+        elif sys_bp == 9999 or sys_bp == 0:
+            if vitals_cache["systolic_bp"] is not None:
+                vitals_cache["systolic_bp"] = None
+                changed = True
+                
+        if dia_bp is not None and dia_bp != 9999 and dia_bp > 0:
+            vitals_cache["diastolic_bp"] = float(dia_bp)
+            changed = True
+        elif dia_bp == 9999 or dia_bp == 0:
+            if vitals_cache["diastolic_bp"] is not None:
+                vitals_cache["diastolic_bp"] = None
+                changed = True
+                
+        if map_bp is not None and map_bp != 9999 and map_bp > 0:
+            vitals_cache["map_bp"] = float(map_bp)
+            changed = True
+        elif map_bp == 9999 or map_bp == 0:
+            if vitals_cache["map_bp"] is not None:
+                vitals_cache["map_bp"] = None
+                changed = True
+
+    if changed:
+        current_vitals = {k: v for k, v in vitals_cache.items()}
+        if current_vitals != last_printed:
+            print(f"Pkt #{idx} (len={pkt_len}) -> Vitals: {current_vitals}")
+            last_printed = current_vitals

fiveparaminte-main/scratch/test_updated_parser.py

@@ -0,0 +1,50 @@
+import sys
+import os
+
+# Add parent directory to path
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from contec_parser import parse_contec_binary_packet
+
+# Read captured stream
+filepath = "/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin"
+try:
+    with open(filepath, "rb") as f:
+        stream = f.read()
+except Exception as e:
+    print(f"Error: {e}")
+    sys.exit(1)
+
+print(f"Loaded raw stream of {len(stream)} bytes")
+
+# We will scan the stream and feed packets into the parser
+# Since we know the packets start with 0x46 at index + 3, let's scan.
+i = 0
+packet_count = 0
+parsed_count = 0
+last_vitals = None
+
+while i < len(stream) - 4:
+    b0, b1, b2, b3 = stream[i], stream[i+1], stream[i+2], stream[i+3]
+    if b3 == 0x46:
+        pkt_len = b0 | (b1 << 8)
+        if 30 < pkt_len < 1050 and i + pkt_len <= len(stream):
+            pkt_data = stream[i:i + pkt_len]
+            packet_count += 1
+            
+            # Feed packet to parser
+            vitals = parse_contec_binary_packet(pkt_data, "192.168.100.139")
+            if vitals:
+                parsed_count += 1
+                # Check if fields changed
+                v_dict = {k: v for k, v in vitals.model_dump().items() if v is not None and k not in ['device_id', 'patient_id', 'timestamp', 'ip_address', 'present_fields']}
+                if v_dict and v_dict != last_vitals:
+                    print(f"Index {i} (len={pkt_len}) -> Vitals: {v_dict}")
+                    last_vitals = v_dict
+            i += max(pkt_len, 4)
+        else:
+            i += 1
+    else:
+        i += 1
+
+print(f"\nDone. Scanned {packet_count} packets, successfully parsed {parsed_count} packets.")

fiveparaminte-main/static/dashboard.html

@@ -3,8 +3,8 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Patient Vital Signs Monitor — Contec CMS7000PLUS</title>
-    <meta name="description" content="Real-time patient vital signs monitoring dashboard for Contec CMS7000PLUS patient monitor">
+    <title>Patient Vital Signs Monitor — Contec CMS7000PLUS / CMS8500</title>
+    <meta name="description" content="Real-time patient vital signs monitoring dashboard for Contec CMS7000PLUS / CMS8500 patient monitors">
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;600;700&display=swap" rel="stylesheet">
@@ -224,6 +224,37 @@
             color: var(--text-secondary);
         }
 
+        /* === Device Selector Styles === */
+        .device-selector-container {
+            display: flex;
+            align-items: center;
+            gap: 8px;
+            margin-right: 8px;
+        }
+
+        .device-select-dropdown {
+            background: rgba(17, 24, 39, 0.8);
+            border: 1px solid var(--border-color);
+            color: var(--text-primary);
+            padding: 8px 16px;
+            border-radius: 20px;
+            font-size: 13px;
+            font-weight: 500;
+            outline: none;
+            cursor: pointer;
+            transition: all 0.3s;
+        }
+
+        .device-select-dropdown:hover {
+            border-color: var(--spo2-color);
+            background: rgba(25, 34, 56, 0.9);
+        }
+        
+        .device-select-dropdown option {
+            background-color: var(--bg-secondary);
+            color: var(--text-primary);
+        }
+
         /* === Setup Guide Panel === */
         .setup-guide {
             background: linear-gradient(135deg, rgba(6, 182, 212, 0.08), rgba(168, 85, 247, 0.06));
@@ -699,10 +730,16 @@
                 <div class="header-icon">🏥</div>
                 <div>
                     <div class="header-title">Patient Vital Signs Monitor</div>
-                    <div class="header-subtitle">Contec CMS7000PLUS — Real-time Monitoring</div>
+                    <div class="header-subtitle">Contec Monitor — Real-time Monitoring</div>
                 </div>
             </div>
             <div class="header-right">
+                <div class="device-selector-container">
+                    <label for="deviceSelector" style="font-size: 13px; color: var(--text-secondary); font-weight: 500;">Select Monitor:</label>
+                    <select id="deviceSelector" class="device-select-dropdown" onchange="selectDevice(this.value)">
+                        <option value="">Waiting for devices...</option>
+                    </select>
+                </div>
                 <div class="audio-toggle" id="audioToggle" onclick="toggleAudioAlert()" title="Toggle audio alerts for critical vitals">
                     <span id="audioIcon">🔇</span>
                     <span id="audioText">Alerts Off</span>
@@ -720,7 +757,7 @@
             <div class="setup-guide-header" onclick="toggleSetupGuide()">
                 <div class="setup-guide-title">
                     <span>📡</span>
-                    <span>CMS7000PLUS Setup Guide — Configure Your Monitor</span>
+                    <span>Contec CMS7000PLUS / CMS8500 Setup Guide — Configure Your Monitor</span>
                 </div>
                 <div class="setup-guide-toggle" id="setupToggleText">▾ Collapse</div>
             </div>
@@ -728,43 +765,43 @@
                 <div class="setup-step">
                     <div class="step-number">1</div>
                     <div class="step-content">
-                        <h4>Connect via Ethernet</h4>
-                        <p>Connect your CMS7000PLUS to this PC using an Ethernet cable (direct or through a network switch).</p>
+                        <h4>Connect via Wi-Fi or Ethernet</h4>
+                        <p><strong>Wi-Fi:</strong> Connect the monitor (e.g. CMS8500) and your PC to the same Wi-Fi network. <br><strong>Ethernet:</strong> Connect using an Ethernet cable (direct or switch).</p>
                     </div>
                 </div>
                 <div class="setup-step">
                     <div class="step-number">2</div>
                     <div class="step-content">
-                        <h4>Set PC IP Address</h4>
-                        <p>Set your PC's Ethernet adapter to a static IP, e.g. <code>192.168.1.50</code>, subnet <code>255.255.255.0</code>.</p>
+                        <h4>Get PC IP Address</h4>
+                        <p>Find your PC's IP address on the network (shown in the box below). If using Wi-Fi, use your PC's Wi-Fi IP address.</p>
                     </div>
                 </div>
                 <div class="setup-step">
                     <div class="step-number">3</div>
                     <div class="step-content">
                         <h4>Configure Monitor CMS Settings</h4>
-                        <p>On your CMS7000PLUS: <code>System Setup → Network → CMS Settings</code>. Set the Server IP to your PC's IP.</p>
+                        <p>On your monitor: Go to <code>System Setup → Network → CMS Settings</code>. Set <strong>Server IP</strong> (or CMS IP) to your PC's IP address.</p>
                     </div>
                 </div>
                 <div class="setup-step">
                     <div class="step-number">4</div>
                     <div class="step-content">
                         <h4>Set Server Port</h4>
-                        <p>Set Server Port to <code>511</code> (default). If running without admin, use a port &gt;1024 like <code>6060</code>.</p>
+                        <p>Set Server Port on your monitor to one of the listening ports: <code id="activePortsList">Detecting...</code> (usually <code>511</code> or <code>518</code>).</p>
                     </div>
                 </div>
                 <div class="setup-step">
                     <div class="step-number">5</div>
                     <div class="step-content">
                         <h4>Enable CMS Connection</h4>
-                        <p>Enable the CMS/Central Monitor connection on your CMS7000PLUS. Set the sending interval (e.g., 5 seconds).</p>
+                        <p>Enable the CMS/Central Monitor connection in the monitor settings. Set the sending interval (e.g. 5 seconds) to start transmitting.</p>
                     </div>
                 </div>
                 <div class="setup-step">
                     <div class="step-number">6</div>
                     <div class="step-content">
                         <h4>Data Will Appear Automatically</h4>
-                        <p>Once connected, vital signs will appear on this dashboard in real-time via WebSocket or polling.</p>
+                        <p>Once connected, the monitor will show up in the "Select Monitor" list, and its vitals will display in real-time.</p>
                     </div>
                 </div>
                 <div class="setup-ip-display">
@@ -970,15 +1007,22 @@
         let setupGuideCollapsed = false;
         let hasReceivedData = false;
 
+        let activeDevices = [];
+        let selectedDeviceId = localStorage.getItem('selectedDeviceId') || '';
+
         // === Initialize ===
         document.addEventListener('DOMContentLoaded', () => {
             initWaveforms();
             updateClock();
             setInterval(updateClock, 1000);
+            fetchDevices().then(() => {
                 tryWebSocket();
                 startPolling();
+            });
             animateWaveforms();
             fetchNetworkInfo();
+            // Periodically refresh the list of active devices
+            setInterval(fetchDevices, 4000);
         });
 
         // === Fetch Network Info ===
@@ -1005,6 +1049,98 @@
             }
         }
 
+        // === Fetch Devices List ===
+        async function fetchDevices() {
+            try {
+                const response = await fetch(`${API_BASE}/devices`);
+                if (response.ok) {
+                    const devices = await response.json();
+                    activeDevices = devices;
+                    updateDeviceSelector();
+                }
+            } catch (e) {
+                console.error("Error fetching devices:", e);
+            }
+        }
+
+        // === Update Device Dropdown Selector ===
+        function updateDeviceSelector() {
+            const selector = document.getElementById('deviceSelector');
+            const previousSelection = selector.value || selectedDeviceId;
+            
+            selector.innerHTML = '';
+            
+            if (activeDevices.length === 0) {
+                const opt = document.createElement('option');
+                opt.value = '';
+                opt.textContent = 'No monitors connected';
+                selector.appendChild(opt);
+                return;
+            }
+            
+            // Sort: active devices first, then offline
+            const sortedDevices = [...activeDevices].sort((a, b) => {
+                if (a.status === 'active' && b.status !== 'active') return -1;
+                if (a.status !== 'active' && b.status === 'active') return 1;
+                return new Date(b.last_seen) - new Date(a.last_seen);
+            });
+            
+            sortedDevices.forEach(d => {
+                const opt = document.createElement('option');
+                opt.value = d.device_id;
+                
+                const statusSymbol = d.status === 'active' ? '🟢' : '⚫';
+                const ipStr = d.ip_address && d.ip_address !== 'unknown' ? ` (${d.ip_address})` : '';
+                opt.textContent = `${statusSymbol} ${d.device_id}${ipStr}`;
+                
+                selector.appendChild(opt);
+            });
+            
+            if (previousSelection && sortedDevices.some(d => d.device_id === previousSelection)) {
+                selector.value = previousSelection;
+                selectedDeviceId = previousSelection;
+            } else {
+                const firstActive = sortedDevices.find(d => d.status === 'active');
+                if (firstActive) {
+                    selector.value = firstActive.device_id;
+                    selectedDeviceId = firstActive.device_id;
+                } else if (sortedDevices.length > 0) {
+                    selector.value = sortedDevices[0].device_id;
+                    selectedDeviceId = sortedDevices[0].device_id;
+                }
+            }
+            
+            localStorage.setItem('selectedDeviceId', selectedDeviceId);
+        }
+
+        // === Change Selected Device ===
+        function selectDevice(deviceId) {
+            selectedDeviceId = deviceId;
+            localStorage.setItem('selectedDeviceId', deviceId);
+            clearVitalsDisplay();
+            fetchLatestReadings();
+        }
+
+        // === Clear Vitals from Screen ===
+        function clearVitalsDisplay() {
+            ['hr', 'spo2', 'bp', 'rr', 'temp', 'map'].forEach(key => {
+                const valueEl = document.getElementById(`value-${key}`);
+                const statusEl = document.getElementById(`status-${key}`);
+                const cardEl = document.getElementById(`card-${key}`);
+                
+                valueEl.innerHTML = '---';
+                valueEl.className = 'vital-value no-data';
+                statusEl.textContent = 'No Data';
+                statusEl.className = 'status-badge offline';
+                cardEl.classList.remove('has-value');
+                
+                waveformData[key] = [];
+            });
+            document.getElementById('deviceId').textContent = 'Waiting...';
+            document.getElementById('patientId').textContent = 'Waiting...';
+            lastReadingId = null;
+        }
+
         // === Setup Guide Toggle ===
         function toggleSetupGuide() {
             const body = document.getElementById('setupGuideBody');
@@ -1086,7 +1222,15 @@
                 };
                 ws.onmessage = (event) => {
                     const data = JSON.parse(event.data);
+                    // Filter messages by selected device or auto-select if nothing selected yet
+                    if (!selectedDeviceId && data.device_id) {
+                        selectDevice(data.device_id);
+                    }
+                    if (data.device_id === selectedDeviceId) {
                         updateVitals(data);
+                    }
+                    // Refresh device list status
+                    fetchDevices();
                 };
                 ws.onclose = () => {
                     useWebSocket = false;
@@ -1109,7 +1253,10 @@
 
         async function fetchLatestReadings() {
             try {
-                const response = await fetch(`${API_BASE}/latest-readings?limit=1`);
+                const url = selectedDeviceId
+                    ? `${API_BASE}/latest-readings?device_id=${encodeURIComponent(selectedDeviceId)}&limit=1`
+                    : `${API_BASE}/latest-readings?limit=1`;
+                const response = await fetch(url);
                 if (!response.ok) throw new Error('API error');
 
                 const readings = await response.json();
@@ -1138,6 +1285,12 @@
                         status.pending_transmissions > 0
                             ? `${status.pending_transmissions} pending`
                             : 'All sent ✓';
+                    
+                    // Update active ports list in guide
+                    const portsEl = document.getElementById('activePortsList');
+                    if (portsEl && status.active_ports && status.active_ports.length > 0) {
+                        portsEl.textContent = status.active_ports.join(', ');
+                    }
                 }
             } catch (e) {
                 if (!useWebSocket) {