Plane: Disable motors when altitude about zero with lidar

[hyperion11]

Feature request

If you land the plane away from you and do not have time to turn on the stop motor, the RTL may be triggered due to RC FAILSAFE, the motors will start and the plane may be damaged.

I propose to add a setting to turn off motors when there is a lidar. We check the alt relative to the home so that it is <= 0. We check the alt using the lidar. If both conditions are met, turn off the motors. I'm thinking about adding airspeed to the check. If it is below FBW_MIN (or less than 2-3 m\s), then turn it off, if more, then not until it becomes less

Platform [ ] All [ ] AntennaTracker [ ] Copter [X] Plane [ ] Rover [ ] Submarine

[IamPete1]

Throttle will be suppressed if landing is detected.

[hyperion11]

Throttle will be suppressed if landing is detected. in my case it didn't happen

[LupusTheCanine]

Throttle will be suppressed if landing is detected. in my case it didn't happen

Landing can be detected only if you are using landing feature IIRC, then motor stop is a part of the flare. Otherwise it is called crash check and can only act after hitting the ground hard enough.

[magicrub]

not all rangefinders are created equal. Some have the nasty tendency to report 0 when not on the ground due to moister or other environmental effects.

I think what you're looking for is the CRASH_DETECT param which will do what you want it to do but without a lidar dependency

[geofrancis]

what about something like a micro switch on the belly? its unlikely to get a false trigger, you could set it up as a button to trigger an aux function but a lua script would probably be better than you can add some other checks.

[LupusTheCanine]

not all rangefinders are created equal. Some have the nasty tendency to report 0 when not on the ground due to moister or other environmental effects.

I think what you're looking for is the CRASH_DETECT param which will do what you want it to do but without a lidar dependency

Yup, I am testing LD2450 (24Ghz human presence sensor that can work as a rangefinder) and it returns 0s for no detections, thankfully it includes a 0 in a field that is consistently not 0 when target is detected but still.