ecg: Stop streaming when connection closes

preload/apps/ecg/__init__.py

@@ -73,6 +73,9 @@ class ECG:
             print("BLE Connected")
         elif event == _IRQ_CENTRAL_DISCONNECT:
             print("BLE Disconnected")
+            self.ble_streaming = False
+            if not config.get_option("BLE Disp"):
+                self.disp.backlight(20)
         elif event == _IRQ_GATTS_WRITE:
             conn_handle, value_handle = data
             if value_handle == self.ecg_cccd_handle: