I have done it. It looks like i have broken my Pixhawks GPS socket. Or it might have bin defect out of the box. I do not see any damage to the socket itself. I have measured the pinout voltage and it gives me only 0.3v while all other serial ports give 5v like they should. The gps module gets no power and when i feed it from another 5v source it works, gets a lock but no data is transmitted to the pixhawk. So it seems serial 1 is gone. I am from Belgium so returning my pixhawk is not an option with the current export restrictions.
Now, my question, is there a way i could use serial telemetry port 1 or 2 to plug in my GPS an so bypass the defective port?
Any feedback would be very welcome.
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Btw, when i measured the voltage i tried both the pins aswel as the sockets soldering pads on the print. Same problem.