Sorry to hear about your dilemma.
I too bought a Pixhawk mini and ran into a similar problem. In my case, I need the second TELEM port to connect to a companion computer (ie, Raspberry Pi), but I was unaware it only had one TELEM port, which…"
"I'm new in here, but need some help. Building a F550 flamewheel hex, and selected the PH mini. Also want to use companion (Raspberry Pi zero W) for flight control. Two questions:
1) once I use up the TELEM port for telemetry,…"
"Hi. I'm new here, building an F550 using Pixhawk mini and DJI E310 power. When I power up the system without props I get very inconsistent motor performance. Sometimes they spin up proportionally to the throttle stick.…"