I ugraded the firmware to my M600 yesterday. Now its not possible to have contact to the A3 flightcontroller ore the X5 cam.
There so many issues with you DJI guys i getting irritated. Why is it like this?

To upgrade the firmware was easy when u just figure out that they did not tell u to unplug the usb cable and restart the drone before doing any else. Then the firmware will apply.