Reverse thrust on a USV

Hello,

I am working on a USV that is powered by a torqueedo motor commanded via a serial port. My problem is that i need to be able to send a negative throttle signal to the boat, but I can’t find this option anywhere in QGC on the HereLink controller now that the Joystick menu has disappeared. Does anyone know any workarounds for this?

It turned out that I had to calibrate the radio in mission planner and not in QGC. Now everything works