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Resetting a Xiaomi air purifier filter with your phone

Xiaomi air purifier filters have an RFID tag that counts usage hours. When it hits 0%, the purifier asks you for a new filter, even if the old one could be cleaned and reused. The counter can be reset from a phone with NFC. All you need is the reset code, and this page generates it for you.

1. Read the tag's serial number

  1. Install NFC Tools (iOS / Android).
  2. Open it and tap Read.
  3. Hold your phone against the filter's RFID tag.
  4. Copy the Serial number, which looks like 04:A0:3C:AA:1E:70:80.

2. Generate your reset code

3. Write the code to the filter

  1. In NFC Tools, tap Other, then Advanced NFC Commands.
  2. Agree to the disclaimer.
  3. Paste the reset code into the Data field.
  4. Tap Send command and hold your phone near the tag.

Put the filter back in. The purifier should now show it at 100%.

A word of caution

Resetting the counter doesn't clean the filter. Vacuum or replace the pre-filter and check the HEPA media yourself. A saturated filter won't clean the air, whatever the percentage says. You do this at your own risk.

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