Trainer mode support for DumboRC remotes

[c0ldtech]

If it's even technically possible, it would be nice to have trainer mode available for remotes using the DumboRC protocol since they are one of the most widespread and cheapest options for surface vehicles. I'd be willing to order/send hardware to someone if necessary (not sure if it is, since DumboRC is already available as a supported protocol).

[pascallanger]

I might be able to give it a go without any hardware. But you'll have to help testing it as I don't have a DumboRC remote.

[c0ldtech]

I'd be glad to do testing! I'm getting my Radiomaster MT12 in one or two days and already have two DumboRC remotes available.

Note: I'm getting the 4in1 version but it will be some time before the external 4in1 module arrives. But I guess testing could already be done without the additional 4in1 module, correct? Just to see if binding works and commands are being received?