I’m using a seeeduino bluetooth shield (seeedstudio.com/wiki/Bluetooth_Shield) with my arduino uno REV 3 to connect with a master bluetooth device wich has a predeterminated (“12345678”) pairing code. But after trying to connect and to input the pairing code from my arduino I realised that this shield use only 4 digit ( “1234” ) pairing code ??? Is this true or I’m wrong ? ( I tryed to connect from my cell phone and if I set a “12345678” as pairing code it does not connect, with a “1234” pairing code it does )
Is there anyway to change or update the shield’s firmware?