I tried hovering for a Hyperlink but must have missed the word "THIS" , if you use the Full Editor you can use Bold and Colour Text too, to make it more Obvious.
I actually have some of those SR boards , the switch needs to be in MMjoy mode to work (Up with switch on the right looking at it) , they are actually a set for use with STM32 based Boards (Ejoy3) not the Arduinos, hence the switch, as Arduino buttons goto ground and STM32 goto VCC so the ground is different .....hopefully that is the only issue, slide the switch the other way and try it, I have not used mine yet as I haven't started my 2nd conversion yet.
Updated with Pics as PCB labels are Wrong
KB.
Last edited by Kbird; 12/16/1805:44 PM. Reason: added correction pics I made for myself