ESPHome for Honeywell air filters (HPA100, HPA200, HPA300)

(for these things)

I’ve designed a replacement control PCB for these dumb air purifiers to make them ESPHome native. All the details and production files can be found on github, but in short, this project includes:

  1. PCB with full support for all the buttons and lights (with RGBW!)
  2. ESPHome configuration that mimics the stock behavior of the power settings, as well as allows for remote control
  3. Written instructions on putting the project together
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