[icheyne]

I could never get this to work on my home network. ¯\_(ツ)_/¯

[mkl]

If you're using Windows, make sure Windows doesn't think your network is public. My dad's computers thought they were on a public network and so wouldn't see each other directly (they were syncing though, very slowly via an external relay).

[prirai]

You have to force it to use wlan or wireless. It solves the problem. Also, wait for a few moments for it to be able to detect your other device.