I wanted a wireless buddy box for my Radiomaster TX16s

This buddy box would allow to wireless link two TX16s in Master/Trainer mode.

Radiomaster is already selling this kind of module.

However their modules need to be linked (soldered with) mini SBUS receiver to work. They won't work with old PPM radios,. Furthermore they are "one way" modules (trainer to slave) and finally quite expensive...

So decided to build mine with the following specifications:

• cheap (two fully working modules for less than 20$)

• auto configuration as master or slave or vice versa

• auto binding between two modules

• fully hidden into the "external module" compartment (no dangling wire outside the radio, no cover modification ))

• no modification into the TX16s

• no firmware modification of your TX16s (stock EdgeTx firmware)

• high speed wireless communication with about 20m range

• automatic On/Off of the buddy boxes via EdgeTx

• compatible 16 channels SBUS and PPM signals

• extensible to further options (teasing: more to come !)

The full project is open source / open hardware. Details are available on my hackadays pages : https://hackaday.io/project/204529-tx16s-buddy-box-wireless-mastertrainer

Note as well that there is nothing to print in this project ! I have added a fake "plug cover" to be able to use Printables as usual !