Xiaomi Mi Air Purifier - solution

Would you mind trying the mi vacuum binding.

If things go well, it should discover your device.
Once you provided the tolken, you have a command channel to which you can send the xiaomi commands (any parameters can be provided in between square brackets) eg. set_mode [ favorite ]

Let me know if it works, and provide the necessary commands & channels (pls provide the log, so I can see the exact format) than I can easy add it to the binding