Copter: unable to arm when throttle is maximized in GUIDED mode

[muramura]

Bug report

Issue details

I did an ARM from a QGC in GUIDED mode with the throttle of the radio on top. I could not arm with "PreArm: Throttle (RC3) is not neutral". I expect it to ignore the radio input except for the flight mode channel. I can transition from GUIDED mode to other modes by changing the flight mode channel.

I will change the flight mode to not see elevator, aileron, throttle, and rudder status when the flight mode is GUIDED mode.

Version

ArduCopter V4.3.0-dev (e9942f9a)

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

Airframe type

QUAD COPTER

Hardware type

SITL

Logs

OTHER STICK

CHECK SOURCE

[muramura]

I would add a decision not to check the radio input if the arm is by MAVLINK. With this addition I could arm ignoring the propo stick.

[rmackay9]

We have a related (perhaps duplicate?) issue here https://github.com/ArduPilot/ardupilot/issues/21415