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I'm also interested, although my curiosity is more about what you are doing with the data.

Just storage? Some sort of charting? Graphite? Maybe some other data monitoring tool? Maybe something custom?

I had a suspicion that winter-time headaches we were having might be triggered by high CO2 levels so I simply wanted to record the CO2 levels in different rooms. Thanks to the sensors, I did, in fact, find that CO2 levels were very high in our bedroom. Once I improved ventilation, things seem to have gotten better.

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