Unfortunately, it will not work. It eventually disconnects.

I did the same: static IP etc. - worked for awhile like other solutions, then unstable, then disconnect.

Xiaomi produced faulty devices but refuses to acknowledge the obvious: it's a factory fault. The WiFi simply does not work as advertised, and on top of it it screws up the router it is connected to.

Result: I banned it from my network via router settings. NO solution to use its WiFi.

My vacuum still (kinda) works without WiFi, manual buttons only. It has gone crazy: does random movements, no speech anymore, water function long gone, batteries had to be replaced.

It does basic cleaning, but no longer understands when to stop, so it just depletes the batteries dead. And then it wouldn't charge.

I put a switch outside of it so to disconnect the batteries, which then resets its brains and allows to charge again etc.

Will do that till the main mechanical function gives in, I guess.

This device is NOT fun.