Wemos D1 mini + MH-Z19 CO2 sensor housing
thingiverse
A miniature setup features a Wemos or Lolin D1 mini ESP8266 board nestled at the base, while atop that rests an MH-Z19B CO2 sensor. Powered by ESPEasy software, the D1 mini periodically transmits the latest CO2 readings to my Domoticz server every 30 seconds. Upon receiving these updates, Domoticz swiftly adjusts the ventilation system's pace in my home.
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