I crashed my quadcopter cx-20. its seems that the gps/compass unit has been damaged. i noticed that the patch antenna is broken. i wanted to hook this unit to my system and check what does it transmit to the main board.. but i'm not quite sure whats the transmission protocol in use. I assumed it was Serial transmission. so i hooked it to my UART USB bridge.. tried different baud rates but could not get a legible readout.
i have not yet opened the inside of the quadcopter. and the gps unit has just 3 wires.