I have EXACT same issue and is clear it’s not a router or network issue, only a camera hardware.
I have two cameras, identical, they even came in one box - it’s YI 1080p Home Camera.
They were been BOTH updated to the most recent versions of the firmware, 184.108.40.206C_201910080934 (this is the latest version according to the camera software – it’s almost 3 years old) when I purchased them.
They BOTH used to work just fine on a few different 2.4 GHz networks.
Since last time they both worked I didn’t make ANY changes to the network configuration.
Couple of weeks ago one of the cameras (working all the time since the purchase, February 2020) stopped working - you could see it does something, you could hear the shutter but couldn’t contact it at all.
I removed the camera in the software and tried adding it once again. I did reset it according to the instruction, then scanned QR code with the same network it used to work - to no avail.
I hear “WIFI IS CONNECTED”, but then I am waiting few minutes in the next step (“Retrieving Pairing Stat…”) and the application says “Failed to load. Please reset the camera” (and the camera itself, 3-4 minutes later said “Pairing has timed out, please restart the camera”).
I did it probably 20 times by now to no avail - it’s broken. I did power the camera off, back on, connected to various power sources (starting from the originally provided charger, then the other charger for the second camera), with and without empty 8 GB micro SD card. Nothing works.
Camera seems to be on (blue light is on) but has not been added to the application (and later complains it couldn’t pair). I can see on my router camera is talking to api.eu.xiaoyi.com just fine.
I tried three different 2.4 GHz networks – all work with the second camera, with all the other devices, but nothing worked with this one camera - it’s broken.
Are there any steps available?
This camera isn’t even listed on the YI firmware download page!