Rx FailSafe Mode = by cnf , not working

[jelcyn-svg]

Hello.

Looks like "Rx FailSafe Mode" = "by cnf" is not working. If switch off transmitter, channels values freezes at last seen points. Not setting to values from Rx FS ChXX. Please help.

Using Matek mR900-30 x2 and ardupilot

[jlpoltrack]

What RC Protocol are you using? (SBUS, CRSF, etc)

[jelcyn-svg]

On the ground I'm using SBUS from transmitter to mlrs tx, and BT module on wbridge port.
On the boat i was trying three options: 1. SBUS from mlrs rx to ardupilot and mavlink between them. 2. Only SBUS plugged in. 3. Only mavlink pluged in, and RC_CHANNEL injection to it.
In all options rc works fine. Just failsafe is the problem.

[jlpoltrack]

SBUS explains it - you need to set ArduPilot's RC_OPTIONS bit 2 ("Ignore RC receiver failsafe bits") - but note that I'm not sure that ArduPilot will then enter failsafe and perform an RTL so this should be tested too (I guess you would want your configured channels to set RTL mode).

[jelcyn-svg]

You are totaly right. So it's ardupilot issue, not mlrs. Not showing real chann values after failsafe flag arrives. Quite confusing. I've done all setup, this was exactly what was needed. I dont know how long will it take me figure out without your help. Thank you very much!