Modbus node doesn not receive data

[Steve-Mcl]

@Josov

Inside a Docker container

That really should have been in your OP & in the title - it changes many things. In fact after a few more questions, you would likely have been pointed to this: Docker NR & ttyUSB0 Permission denied - #17 by janvda

In short, please mention things like "docker" or "containerised" in your OP because it changes a lot of things.