So, since no one was going to open their code and hardware for him he simply made his own. OpenPLC can be programmed in all 5 IEC 61131-3 languages: ST, IL, LADDER, FBD and SFC.

An industrialized open-source and Arduino-compatible CPU interoperates with PLC I/O modules and various Arduino “shields.” (Shown: AutomationDirect ProductivityOpen P1AM-100) After more research, my ...