I have three different AD-20 modules here, and I'm trying to identify the functions. All the actual PCB boards are the same, obviously the function is determined by the uP on the board.
The one on the bottom with the red dot on the uP is the diesel ditch light AD-20, the one in the middle with the white dot on the uP is the wireless tether AD-20 that supports the tender coupler, reverse light, and serial data repeater.
The burning question is, what is the function of the one with the green dot? It doesn't appear to do much in response to serial data, and there are no outputs for anything I've been able to determine. The two outputs that drive lights a couplers don't react to anything I send over the serial data. Since I have three of them that all react the same, I am concluding they're probably not all defective.
Anyone got a clue what the function of that particular code base is?