pairing Arduino BT with PC


I bought a bluetooth adapter for my Arduino BT so that I can work with it in Max/MSP. I'm really new at bluetooth so I'm not quite sure I know what I'm doing.

But my bluetooth adapter is asking for a passkey for the Arduino BT when I try to pair the two together. Can someone point me in the right direction on how to pair the two properly? does Arduino BT have a passkey of some sort ?



the pass code for de ARDUINOBT is 12345

you can find some info about it here:

if you would like to change the pass code you should burn a differen bootloader, which is explained here:


Hello Betty

the passkey is 12345

You should have a look at the arduino BT page on the main website. there are pointers on how to get started



in order to change the pass you DON'T need to burn a new bootloader...

you just need to run a program that send this commands

Serial.begin(115200); // connect to the serial port digitalWrite(7, HIGH); delay(10); digitalWrite(7, LOW); delay(2000); Serial.println("SET BT AUTH * 12345");

PS change 12345 with the new passcode

thanks erik and massimo. I got the pairing to work :)