fix: resolve stale waveform duplicates and throttle bypass for real-time streaming

fiveparaminte-main/contec_server.py

@@ -177,6 +177,9 @@ async def process_vitals(vitals):
     if device_id not in device_field_timestamps:
         device_field_timestamps[device_id] = {}
 
+    # Check if incoming packet has fresh waveforms
+    has_fresh_waveforms = (vitals.ecg_wave is not None) or (vitals.pleth_wave is not None)
+
     # 1. Merge new vitals into cached vitals to prevent fragmented entries
     if device_id not in device_cache:
         device_cache[device_id] = vitals
@@ -236,6 +239,7 @@ async def process_vitals(vitals):
         logger.debug(f"WebSocket broadcast failed: {e}")
     
     # 4. Throttled Database & REST forwarding (at most once every 5 seconds)
+    # Note: If we have fresh waveforms, we bypass throttle for REST forwarding to keep cloud graphs real-time
     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:
@@ -339,3 +343,14 @@ async def process_vitals(vitals):
             db.rollback()
         finally:
             db.close()
+    elif has_fresh_waveforms:
+        # Bypass throttle for REST forwarding to keep cloud graphs real-time
+        try:
+            await forward_vitals_to_api(vitals)
+        except Exception as e:
+            logger.error(f"Real-time REST forwarding failed: {e}")
+
+    # Clear waveforms from cache to prevent repetition in subsequent non-waveform sub-packets
+    if device_id in device_cache:
+        device_cache[device_id].ecg_wave = None
+        device_cache[device_id].pleth_wave = None