Hello, I set AHRS_GPS_GAIN, AHRS_GPS_GAIN, GPS_TYPE to 0 in parameters.
ARMING_CHECK is set to 98 to bypass all checks.
I do Takeoff from the catapult in AUTO mode on a rear motor UAV with a given TAKEOFF point in the mission, it is not turning on the engine after getting off the catapult in conditions without GPS. There is no GPS module on the aircraft at all.
I have Matek h743-wing v3 flight controller as of now.
In the standard setup in AUTO mode in conditions with GPS, the engine turns on and all is ok. When the GPS module is missing, then in AUTO mode there is some guard state so the engine does not start.
I tried fake gps module via MavProxy, the plane icon appears in mission planner on map but I still not able to turn on the motor in AUTO mode.
I also tried the ahrs-set-origin.lua, but all it shows in the messages tab is that “ahrs-set-origin: started” and thats it…
What do I need to do to just a takeoff without GPS in auto mode and then switch after like 5 seconds into FBWA??
As you disabled some arming checks you can’t see the result of these arming checks. But disabling a check don’t mean that the source of these value will be not used by the controller. So in this case some parameter are missing to start the engine. In Auto mode allways a correct postion information is needed.
You video is nice but without any helpfull information. Better send Log and Parmeter files
well, I know how ARMING_CHECK works, I am asking what specific parameters I can turn off or on to be able to do AUTO takeoff without GPS. As far as I know, there are available firmwares for such task for some flight controllers. But I need to do it on matek h743 wing
If you know all about ARMING_CHECK, than you might also know that these could be very helpfull to find errors like yours as they sometimes show what is missing.
Leave the arming checks on, turning them off won’t help. You need to deal with the EKF. If you plan to fly in auto mode the plane still needs to know where it is. If you’re not giving it GPS then you need to feed in data some how. I don’t know how to do that, especially on a plane. Optical flow I don’t think is fast enough.
Are you just looking for auto-take off? That might just get away with a compass.
