I’m trying to make a board that can be activated wirelessly but also used by the switch as my parents would rather use the switches. I’ve seen someone who made this and posted a video of it on youtube but I think he only gave the firmware/codes and no board schematics etc.
Would be greatly appreciated if someone told me how to do that, I basically want to make a board that will be in the line between my wall switch and lights, I want it so that people can control the lights with the switch as well as wirelessly.