Hi
I’m having an issue with an APM 2.6 i got from UT last week, everything seems to work fine apart from the barometer doesn’t give correct readings, it just seems to stay at zero, and when i test it in the mission planner terminal i get the following
anybody have any ideas what is wrong is it a hardware issue?
Could it be a power issue? Almost looks like it isn’t working. I remember reading some people had an issue with the 3.3V regulator or something that effects the barometer.
If you got it from Unmandtech I would suggest emailing him directly. Otherwise contact your supplier
I sent an email to Unmandtech first, just thought I would check on here and make sure I wasn’t doing anything stupid while I wait for a reply.
Based on what you have said here I wouldn’t say you have done anything wrong (unless you took to it with a hammer 
)
The barometer on the APM 2.6 is famous for being easily damaged. I had a similar issue where the barometer wouldn’t calibrate, and everything I could find said that it was fried. As a last chance I used Arduino IDE to perform a EEPROM wipe, and then put all new software on it, and that fixed the problem. If you haven’t tried that yet, try it. It might work.
Good luck!
APM 2.6 has long been considered “obsolete” (support was discontinued around 2015). Zero readings usually indicate a hardware failure of the MS5611 sensor itself via I2C. But the main question is: why build an FPV system on an APM at all in 2026? Just go with any modern flight controller based on an STM32F4/F7 or H7 (SpeedyBee, Matek) running INAV or Betaflight—it’ll save you a lot of stress and time.
