Can you try setting up the Duet in Access Point mode? This will have the Duet create its own wifi network that you can connect to from your device. If this works then we know the problem is with the router/configuration rather than the duet hardware.
@Phaedrux
The motor wires were connected incorrectly and I just disable the fan function in the RepRap firmware because I did not order the corresponding wires yet. Anyways, the homing of the x and y-axis works well now.
Thank you.
@tkdirp How to change it? Sorry, but I'm a beginner and I have similar problem
This thread is 2 years old. It would be best if you started a new thread with your issue. Give as much detail about your situation as possible. Thanks.
While we can't offer warranty replacement on this unit we can offer a possible refurbished unit on exchange. Please contact Roland on sales@Duet3d.com to inquire. Include a link to this thread.