Buetooth connection failed: read failed, socket might closed or timeout, read ret: -1

Try to use ,

createInsecureRfcommSocketToServiceRecord(MY_UUID)

in place of

createRfcommSocketToServiceRecord(MY_UUID)

This should fix the problem. Share your debugging results , if this doesn't fix the issue.

Also , don't generate random UUID(s), try the one below.

UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");