"Went back into MP.  Loaded AC3.1.5 firmware which is listed as the last version that supports my board since it is "retired" according to mission planner (I guess 3DR wants us all to buy a Pixhawk).  The dates are sorted out by the GPS data.…"

"I have had the same problem.  Mine is the '69 date.  Getting good GPS lock( solid indicator).  Quad with apm 2.5.2 with external GPS/compass unit running ac3.2.1.  Went to review logs because i was in the process of testing and when i tried a…"

"The mag does plug into the I2c. You need to search how to add external compass on YouTube. There is a trace that needs to be cut on the apm board. Then you need to change some settings through mission planner and upload. Good luck."

"Went back to the beginning. I deleted and erased all MP and drivers. Installed APM Planner2 and arduinomega 2560 drivers. Updated firmware through APM Planner2 first time with no problems. Will make final post after some testing."

"I was able to connect via CLI and it show that i have Arducopter V3.1.2.  Unfortunately i need to use this board on a Bixler2. All same info as above shown when I try to upload new firmware in MP."

"completely disassembled the quad an inspected each connection bit by bit.  the most suspect connection in respect to the power system is the power harness from the power module to the apm.  it has been tugged and pulled many times being mounted on…"

"noticed the log analyzer showed:
Test: Brownout = FAIL - Truncated Log? Ends while armed at altitude 5.28m
-----the apm is powered through the 3dr power module and the 3s 4400mah lipo still had 11.4v left after recovery
and:
Test: Event/Failsafe =…"

"i have replaced the broken arm and tested the motors...all is working.  i guess that if one of the connectors were bad it would show on the test.  Just to be sure i will go back and reflow the bullet connectors. They were all pretty dang tight.  did…"

"Yes I followed the setup on the arducopter page"

"Forgot equipment used:
Apm2.5 fw3.1.3
3dr power module
915mhz telemetry
Gps with external compass
Sunnysky 2212 1400kv
40a esc non simonk
9x4.7 props
Taranis tx
D8rII+ rx"

"Hello to all in this thread.  I had a similar problem yesterday.  Flew auto mission 3 times.  First two times quad lost altitude till landing between wp1 and wp2. I then edited the mission to just waypoints with no loiter. Third attempt the last wp…"

"Split a lead"