I bought one of your LED Bulb (White) and I'm struggeling to use it from https://home-assistant.io/ and it looks like that the main problem is that I can't set it into "Developer Mode" or "LAN control" as it is supposed to be called now. I neither can do a firmware update, right now I'm on version 1.2.4_18 and the app says that "This is the latest version". As far as I understand setting it te developer mode is only working with Firmware >= 1.4.1_31
I can control if from the Yeelight app on Android. I have tried the USA server.
My MI ID: 1650766021
Bulb firmware: 1.2.4_18
Check for Update: "This is the latest version"
OK i found out what was wrong. The problem is that the USA server doesn't have the same firmware updates uploaded as the China server. As soon as I changed to the China server and readded the bulb there was a firmware update available in the app and after the firmware update I was able to switch on the LAN controll which made it possible to use in Home Assistant.
I'm still posting this for people who have the same problem.
And for the admins here, could you be so kind and make sure all three servers have the same downloads available or even better remove all but one server so this mistake doesn't happen again. You should instead use load balancers like everybody else.