Flysky support and trainer interfaces

RCHub converts USB controller signals to trainer signals encoded in PPM protocol. Effectively, RCHub plays the role of a student radio when connected to a master radio controlling a model.

Most modern radios from FrSky to Radiomaster use 3.5mm aux (audio) cable to connect the teacher and student radios.

RCHub ships with 1m long cable with 3.5mm jacks on both ends. PPM signal goes to the tip of the connector, Ground goes to the contact in the middle. This configuration is verified to work with both FrSky and Radiomaster radios and allows us to use both mono (two contacts) and stereo (three contacts) cables.

Some radios however use other types of connectors. For example, popular entry-level radio Flysky i6X uses PS/2 socket. It is not directly possible to connect RCHub and Flysky i6X, a modification required.

The cleanest solution that requires minimal modification and soldering, it is to install 3.5mm socket in radio and solder 2 wires to trainer port pins. Please check photos below.

Drill a hole in the back plate of your Flysky i6X radio, insert and secure the AUX socket, solder two short wires as shown on the picture. Done, now you can use RCHub to source PPM trainer input into your Flysky radio! Consult your radio's manual how to put it into trainer mode, leader/teacher side.

Another option is to make your own adapter cable from PS/2 to 3.5mm AUX. This does not require the radio modification, but may be a bit harder to source parts, solder correctly and make it look good.

When going this path, please pay attention to the fact AUX cable's tip to be connected to radio's PPM Input pin, as RCHub plays the role of a student radio in this setup. 

Check the table below for exact pinout for various trainer interfaces. For example, in case of Futaba we want AUX cable tip to be connected to pin 6 in rectangular connector, and AUX middle contact to pin 2.