Today I've tried to do the same thing but using 3 potentiometer; it seems to work but the receiver it's not refreshing so the leg RGB doesn't change :( However, it's interesting that when the receiver arduino begins or when restarted, it refreshes. Another thing is that if the antennas are touching each other it works. I think it is not a problem of the transmitter because it works from more than 5 meters away when the receiver is restarted. I might have forgotten something on the receiver code or even i don't know. I'll look for another methods.
I have some hypothesis about the problem:
- The receiver code has a logic mistake.
- There is noise between the unit.
- This method is not proper.