Hey Ben,

It has been a while.
I am experimenting with SCD40/SCD41 (aka SCD4X family of sensors):
- they seem to be affordable
- they use I2C
- they might be a great replacement for the DHT22 as they are smaller and measure also temperature, relative humidity (next to CO2 concentration levels)

Hey!

Do not hesitate to also write me if you have any issues.
Let me know how did it go!

Greetings,
wojked

P.S. Kudos to the “lets control it” team!