never a silly question. Yes, my command nodes are on and off.
And when I inject a simple command (with the inject instruction) on/off, it works. That means all the commands (hubitat side) are working: commands, Maker API, etc
So it's definitely between the 0/1 obtained from my plc and the on/off sent to my hubitat switch.
Somewhere in the switch node... But I tried arguments, msg.payload[40], etc, without success 
