The key input, pin 34, as to be high level before powering up the module to enter in command mode. it has to point to low to be in pairing mode. You cannot just leave it unplug. Ither way, it need to be hook on 3,3 volt or ground.
The key input, pin 34, as to be high level before powering up the module to enter in command mode. it has to point to low to be in pairing mode. You cannot just leave it unplug. Ither way, it need to be hook on 3,3 volt or ground.