FMS FCX doesn't bind with MT12

[MlCHEL1234]

Hello,

Since the beginning of December 2025, I have been the proud owner of an FMS FCX24 Unimog. The model comes with a pistol transmitter that looks a bit like a toy and is poorly equipped, lacking many useful functions and stubbornly refusing to work with my MT12 (Tx: EdgeTX 2.11.4, 4in1-Modul: 1.3.3.20, since 1.3.3.24 thee are only some protokolls visible, 1.3.4.31 has an error:"No valid firmware").

After what feels like thousands of attempts to connect it using various 4in1 firmware versions, protocols, and sub-protocols, I've now had enough. It seems that it won't be possible to connect the model's receiver and the MT12.

If anyone knows how to do it, I'd really appreciate some advice!!!

The devices and protocols used with the FMS-FCX24-Uninmog can be seen in the picture (Part of the manual).

The image shows the devices and protocols used.

Meanwhile, the Unimog will become brushless sometime next month, which means that the original transmitter and receiver will initially be out of work. However, Santa Claus brought me an Orlandoo OH32X01 as a kit—without a motor, etc. Until I find brushless drive components and servos for it, the FMS receiver and motor will have to go in there. After that, they will be out of work for the time being. I suspect that many FMS owners have the same problem.

If Pascal likes (!?!), I'll send him the transmitter and receiver (around February 2026) and he can take his time going through it to find the information and data that's important to him.

@pascallanger: How should I send it to you? How much lead time do you need? As I see it, we live in the same currency area??? I would pay the shipping costs both ways.

I hope you were all good and that Santa was generous to you.

Bye
Have a nice holiday season
Michael