I'm trying to bring my old AQ32 flight controller to life after several years in a drawer, everything seems OK, I can see RC input sliders move with TX sticks, I can make all motors spin in test mode, but I can't arm the FC.
Please see attached some screens from configurator.
Of course I try it with USB disconnected and throttle at zero. The heartbeat LED is signalling "Normal (disarmed)". When I change flightmode to Autotune, the LED is signaling illegal mode (so I can see RC is working). There must be something I'm still missing.
Thanks for any advice.