Hello,
My flight controller is matek 743 wing using APMVERSION: ArduPlane V4.0.9. It froze in the middle of the flight today. The plane took off and cruised in cruise mode for the first several minutes without any issue and then the flight controller seems frozen and the ground mission planner showed disarm and InternalError 0x800. But the onboard video shows the motor still running and out of control state. The plane turned around and kept losing altitude until landed in the field.
After I retrieved the plane and tried to connect the FC to the computer. The FC is in a frozen state and cannot connect to missionplanner. I downloaded the logs by an sd card reader. The logs were divided into multiple 794 kb small log files except for the first log which is the successful part of the flight.
H7 chip is known for frozen. And 4.0.9 has the fix to prevent this.
But not sure what triggered the FC into this dangerous state on this flight. I’m just lucky the plane landed in an empty field and didn’t damage any property or hurt anyone today. But I do want to root cause this before reimage the FC and next flight.
From search, The log file that began after the reboot contains Internal errors detected (0x800)
which indicates the FC rebooted by watchdog. Not sure why the FC reboot or reset in the middle of flight https://github.com/ArduPilot/ardupilot/issues/11296.
Could someone please help investigate the bin logs? Thanks in advance.
Video:
FC frozen state: https://youtu.be/tPAZQEm7naQ
Onboard video and OSD: issue started at 4:19 https://www.youtube.com/watch?v=lBVOksKg9yw&t=259s
Here is the log:
https://drive.google.com/file/d/1bPdmr7qJLP6IdthKUFF54A2ZAMzpb-WZ/view?usp=sharing