I will use it with Tasmota:
For flashing you need this:
https://tasmota.github.io/docs/devices/Sonoff-4CH-DIY/
The template are taken from:
{“NAME”:“Geekcreit-4ch”,“GPIO”:[9,0,0,0,23,22,10,11,21,52,12,24,0],“FLAG”:0,“BASE”:18}
Tasmota 9.3.1 is running sweet…
Details to use the module are here:
http://raspberrypiwiki.com/5V-4_Jog_Switch