@c.man The codesys package for Unipi is working well. But you will need to figure out the way how to communicate between codesys and OpenHAB. And for that, I would recommend using Mobus TCP - create a TCP Modbus server in Codesys, map the variables you want to have available in OpenHAB to the Modbus registers and read/write to/from them in OpenHAB... Or you already have that solved?