I try to read and write to the Picontrol0 file.
I can read and write but i have problems with the logging.
The "/var/log/kern.log" becomes huge, and the revpi is no longer available (rotation daily)
What is wrong, can I disable the logging?

logging data:
===========
piControl 0:piControlOpen ...

You are certainly wright. The hint was the solution.

I'm a 'normal RPI' user, ...

Thanks

I am testing a image of octopi, on a revpi3.
It is going well except the wlan is not showing up, even with lsusb.

How can i solve this?