I am trying to scan for bluetooth devices using a processing based android app. I would like to use processing to communicate to my microcontroller board via bluetooth as shown in the example below:
http://webdelcire.com/wordpress/archives/1045
I was successful in launching this app on my android tablet. However, I am not able to list the bluetooth device on my tablet. The only bluetooth device that my tablet recognizes is the bluetooth adapter on my computer. Why am I not able to list all the bluetooth devices? My computer is able to recognize the microcontroller’s bluetooth device.
Probably your embedded target board identifies itself erroneously as a Bluetooth Device.
The computer’s Bluetooth adapter accepts this error, while Android does not.
If you can change the SDP records (Bluetooth search discovery protocol) of the embedded target board, maybe Android will see the device (try making it look as a headset or hands free device!).
The quick way is to change the ‘magic numbers’ defining the SDP class, service id, etc. The numbers are inside this document. Then see if Android sees your board.
You can also read the Bluetooth Core Spec if you have the time.
See this tutorial for more on the formal aspects, and “Bluetooth for programmers” for a lighter introduction.