How to add alarm notification in app when bluetooth connection is lost?

[Taifun]

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Change Text when Bluetooth disconnected

according to the documentation http://ai2.appinventor.mit.edu/reference/components/connectivity.html#BluetoothClient DisconnectOnError Specifies whether BluetoothClient/BluetoothServer should be disconnected automatically when an error occurs. I don’t think so, because you forgot to poll the bluetooth device as @ABG suggested as the bluetooth protocol was designed, there is no way to detect, if a connection still is alive, therefore you have to send regularly (i.e. poll) some data to th…

Taifun