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A comment on Indoor CO2 may reach levels harmful to cognition by the end of this century. Parent comment

Re:Indoor CO2 may reach levels harmful to cognition by the e... by throwaway3neu94 on Saturday September 19, 2020 @12:30PM (#24528579)
You should be using the newer version, MH-Z19B, not MH-Z19.

The protocol is compatible though.

Also note they come in up-to-3000ppm and up-to-5000ppm variants. Be sure to get the latter.

In case it helps anyone: a very fast way to get it working and get graphs is to connect it to a Raspberry Pi running HomeAssistant. Takes a few clicks and 3 lines of config.

[ Parent | on HN ]
Re:Indoor CO2 may reach levels harmful to cognition by the e... by cosmic_shame on Saturday September 19, 2020 @01:27PM (#24529046)
For portability, you can also hook up to an ESP8266/ESP32 and configure to talk to HomeAssistant via ESPhome: https://esphome.io/components/sensor/mhz19.html
[ Parent | on HN ]