4 ms·

$20 on AliExpress. https://www.circuits.dk/testing-mh-z19-ndir-co2-sensor-module/ https://www.circuits.dk/testing-mh-z19-ndir-co2-sensor-modul...

• tgsovlerkhgsel 7y ago
  That + one of these ESP8622 or ESP32 dev boards with a display is an easy way to make a home-made cheap air quality monitor.
  • tda 7y ago
    Add a Pms5003 and a bme280 and you can measure temperature, humidity, air pressure, CO2, and PM10 (particulate matter) all for about $45
    • jonathanwallace 7y ago
      Is there a tutorial on how to do this? Or what would I search for to find such a tutorial?
      • lnsru 7y ago
        Start reading data sheets of mentioned parts. Stick them to some Arduino and write code. These measurements aren’t special in any way.
      • tda 7y ago
        Though it really depends on what you want to do with the data, I can really recommend to use esphome in combination with homeassistant/influxdb/grafana. You can configure the sensors with a simple yaml file, compile and upload to the chip and then add it to a homeassistant dashboard. Long term trends can be queried from influxdb and presented in a grafana dahboard