I'm attempting to do some very basic location based sensing using the bluetooth signal between two gumstix.

The readings I'm getting from the bluetooth for RSSI and Link Quality don't vary much. I've only seen RSSI readings of 0 and -1 (the spec says they go from -128 to 128) and only values of 193-196 from the Link Quality field. The Transmit Power Level seems to jump from -29 to -10 to 10 to 20.

Has anyone else had any experience in getting some useful data out of a bluetooth connection?