@ex3dp If you changed the router, you will need to register the new WiFi network with the Duet. You're getting the message "WiFi reported error: no known networks found". See this guide: https://duet3d.dozuki.com/Guide/1.)+Getting+Connected+to+your+Duet/7#s10
Also, you're on very old firmware; RRF v1.21. Consider updating to v2.05.1, which should be relatively straightforward, and not need any major changes to your configuration. https://github.com/Duet3D/RepRapFirmware/releases/tag/2.05.1
Ian