When I connect Pixhawk 4 (FMU v5) to computer with USB cable, QGroundControl shows message like this. Pixhawk 4 cannot connect to QGroundControl.
But I can upgrade firmware for Pixhawk4 from QGC. It has detected my device.
I tried changing the cable, and switching to another computer, but it still is not working
This is the video I recorded about my error