This tool will calculate the  NFC  tag password  and the reset command for different Xiaomi Air Purifier Filters.

Use NFC tools on your android  phone to read the UID  (Serial Number) of the filters NFC  tag.

Paste the UID (for example "04A03CAA1E7080") in the tool and click "Generate Password".

Copy the generated Command (in this example "1BCD91AFCC,3008,A20800000000").

In NFC tools go to "Other > Advanced NFC commands" and select "accept".
Make sure “NfcA (ISO 14443-3A)” is selected as I/O class.
Paste the generated command in the data box.
Click "Send command"