I have tried to set up my first Bluetooth project with my Netduino 2 plus, but I am banging my head into a problem.
I got myself an HC-05 Bluetooth module. Not a very user-friendly module with its 1.5mm pitch edge contacts, but despite my limited soldering experience I got the necessary wires successfully connedted. Basically, the unit works and the serial interface side is responsive - I can enter command mode, send AT-commands to the unit and get the expected response back. Except...
According to the documentation I found on the net, when the unit is in in Master mode, the AT+INQ command should return a list of other devices within reach of the HC-05 (within a minute or so). I have put my Android phone as well as a Bluetooth headset close to my project workspace, but AT+INQ returns nothing exept from an OK (after a minute).
On my smartphone, I can see and even connedt to the HC-05 module, so the radio communication side also works. But probably there is a configuration issue which I cant figure out.
Is there anybody out there experienced in Bluetooth configuration who could lead me in the right direction?
-knut