I have a master controller PCB with sockets 0-5. I have module PCBs A-F that plug into the sockets in an unknown order. I am wondering if there is a simple way for the master controller to know the ordering of the module PCBs. (In the digram it would be
[C, E, A, B, F, D].) There is one "signal" line drawn but additional ones could be added (or additional components/circuitry).