I don't see how prop guards would disable obstacle avoidance? There are no sensors or leads in the arms except motor and LED. (
Look at 2:22 and ) Since the guards clip in and there is no switch or sensor, there's no means for the P4 to know that the guards are attached than
visually or by weight. The Firmware updates added the note "Added propeller guard detection. Obstacle Sensing system is automatically disabled when a propeller guard is installed." (
DJI Forum|NEW PHANTOM 4 FIRMWARE ANNOUNCEMENT) on the Firmware page. Only 4 wires go to the arms. Two White, two black. One pair for Motor and one for LED.
How are they doing it and Why? Do the guards obstruct the obstacle sensors?