Comment by nomarv

For my use case — simply getting some statistics about the air quality in our shared flat, improving concentration, and having a reminder to ventilate — the accuracy of the SCD40 is sufficient. It also has a self-calibration feature, which works as long as it is exposed to atmospheric CO₂ levels at least once a week. See the detailed specifications here: https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/d...