Does the HA has integration for so called Xiaomi Temperature Humidity Monitor https://gearbest.app.link/FBx4iEmwHK ?
It is meant to connect with internet via the BLE Gateway (Bluetooth Low Energy) and yeelight bedside lamp or the yeelight ceiling lamp are acting as such gateways.
Asking because I couldn’t find any existing Components that would cover that.
I don’t believe it’s possible atm 
I think these are compatible but you would need the hub as well, well worth it in my opinion 
https://www.gearbest.com/living-appliances/pp_344665.html
On domoticz forum here I found that the colleagues have experimented with that and created sth like https://github.com/pFenners/mijia-sensor-domoticz but I have doubt if this is actually working and does it mean that you have to unpair it from Mi Home and pair with some BT device instead ?
hi, you can try my custom component that I have created. (https://github.com/dolezsa/Xiaomi_Hygrothermo). let me know if you are satisfaied with it… suggestions are welcome.