"I am not sure what is going on, but have you tried checking the voltage coming out of the sensor (on the pin that you plug into the APM board). Use a multi-meter and see what kind of voltage is coming out when you plug your battery in. That will…"
I think I already know the answer here but I will throw it out there. New APM 2.5 with case, gps and minim osd: Started installing everything in a bixler clone and getting it all setup. It was going smoothly, I had the RC calibrated, ppm sum working…