Xiaomi Mijia BLE Sensors - CGDK2 - cannot get bind key

ESPHome
1

Hi, all
I have few Quingpin CGDK2 sensors. I successfully got the bind key for all of them, but one. I have used the Telink Flasher to get the key. One sensor behaves in a weird way. I can connect to it and pair with it. Once connected I press on Do Activation and receive 17:54:18: Activating now, please wait…
Bind key does not appear. Nothing happens. I have even left if in that state overnight and it just drained the battery.
I have tried factory-resetting it numerous times.

Does anyone have any ides as to what can be done?
Thanks

2

I would use the ATC MiThermometer as the custom firmware.

Link below to flash

TelinkMiFlasher.html

Hope this helps

:grinning:

3

I have tried all possible web-sites that can get the key. As soon as I press Do activation, it just goes into Activating now, please wait…

Screenshot 2022-11-30 212816
Screenshot 2022-11-30 212816817×1158 53.4 KB

And it just sits there. :frowning:

4

Found solution:

Connect, select “Do activation” The log will say Activating now, please wait
Hold the button at the rear of the device until the Bluetooth symbol flashes. The device will disconnect.
Reconnect, select “Do activation” then momentarily press the button.
The Device Id, MI Token and Binding key values will be retrieved.

This worked!

4 Likes