version 3 final working real BT

vitallink/simulator/wristband_manager.py

@@ -160,22 +160,54 @@ class RealWristband(BaseWristband):
         )
 
         try:
-            self.client = BleakClient(self.ble_address)
+            self.client = BleakClient(self.ble_address, timeout=20.0)
             await self.client.connect()
+
+            if not self.client.is_connected:
+                raise Exception("Connection failed")
+
             print(f"✓ Connected to {self.band_id}")
 
+            # Subscribe to notifications
             await self.client.start_notify(CHAR_UUID, self._notification_handler)
             print(f"✓ Subscribed to notifications from {self.band_id}")
 
+            # CRITICAL: Keep connection alive!
+            print(f"  Monitoring {self.band_id}... (will stay connected)")
+            while self.client.is_connected and self.status == WristbandStatus.IN_USE:
+                await asyncio.sleep(1.0)  # Keep alive loop
+
+            print(f"  Connection to {self.band_id} closed")
+
         except Exception as e:
-            print(f"❌ Failed to connect to {self.band_id}: {e}")
+            print(f"❌ Error with {self.band_id}: {e}")
+            print(f"   Type: {type(e).__name__}")
+            print(f"   Details: {str(e)}")
             self.status = WristbandStatus.MAINTENANCE
 
+        finally:
+            # Clean disconnect
+            if self.client and self.client.is_connected:
+                try:
+                    await self.client.stop_notify(CHAR_UUID)
+                    await self.client.disconnect()
+                    print(f"  Disconnected from {self.band_id}")
+                except:
+                    pass
+
     def _notification_handler(self, sender, data: bytearray):
         decoded = self.decoder.decode(bytes(data))
         if decoded:
             self.last_packet = decoded
             self.packet_count += 1
+
+            # Print to console (for debugging)
+            print(
+                f"🔵 [{self.band_id}] Packet #{self.packet_count}: "
+                f"HR={decoded['hr_bpm']} SpO2={decoded['spo2']}% "
+                f"Temp={decoded['temp_c']:.1f}°C"
+            )
+
             asyncio.create_task(self._send_to_backend(decoded))
 
     async def _send_to_backend(self, decoded: dict):