Hi,
I did M588 S"*"
M588 => with the wifi name and password, now it's working. I hope for a long time!
But I still don't know what the cause of the malfuction was.
I did not set an IP aress manualy in the config, just followed the instructions on the Duet3D website. Getting connected to your Duet.
Best regards.
Kees