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I have been using Home Assistant to integrate everything. I have Google flavored, but it also has HomeKit support. https://www.home-assistant.io/components/hom

• DavideNL 7y ago
  Thanks for the tip! Home Assistant has a module for the "MH-Z19 CO2 Sensor" (1) which is on AliExpress for $20 (2). So i'll probably give that a try... 1) https://www.home-assistant.io/components/mhz19/ https://www.home-assistant.io/components/mhz19/ 2) https://aliexpress.com/item/1PCS-ORIGINAL-Brand-New-MH-Z19-CO2-Sensor-0-5000ppm-NEW-CK/32810419056.html https://aliexpress.com/item/1PCS-ORIGINAL-Brand-New-MH-Z19-C...