I have been using a few old phones as gsm modems, simply because they cost next to nothing, i was just wondering if anyone knew if it was possible to access the bt features on them via serail comms with a pic, i simply want to see if another device is in range, to work as an auto door opener etc

if anyone has an idea on how to achive this, i'd be happy!

has anyone used any BT radios/devices ?