My setup is like this:
Lafvin 2wd robot car v2 with ARDUINO BOARD.
Android mobile phone with android version 14
The bluetooth module is a JDY-016
I have a button connected to beforepicker and the phone bluetooth is connected to the JDY-016 because the red light is steady.
When I click the Connect button on my phone I get the correct bluetooth list with also JDY-016 in it. When I select the JDY-016 I get the error507 and no connection of course.
You forgot to ask for Bluetooth connect permission
Taifun