Check Bluetooth connection status

MIT App Inventor Help
1

hi, I know that this is a recurring issue, but I haven’t managed to find a suitable answer amongst the queries….hope some can help.

I’m sending data from an ESP32 to App inventor via Bluetooth Classic - not BLE. The problem is that I need to check the status of the BT connection and have the app behave gracefully if the connection is lost. The ‘is bluetooth connected?’ block doesn’t work and my attempt to use the ‘screen.onerror’ block seems to be ignored. Can anyone please tell me a way to have the app close the errant screen and reopen screen1, many thanks….

blocks
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2

Once device is connected…isConnected always returns true.

To check if connection is “still alive” you can:

  • if receiving a continuous flux of date, set a watchdog ( a timer )
  • if transmitting a continuous flux of data the screen.ErrorOccurred is triggered ( error 516 )
3

This example might be interesting for you

Taifun

1 Like
4

Thanks both, for these suggestions…