Finally got around to writing the software that reads this data. Thanks for your reply. 🙂

I continue to be very happy with the A3. I recently especially appreciated the wide range of allowed input power; I was able to change from using the transformer to using a 24V Passive PoE switch to power the unit remotely, which was very convenient.

I have a follow-up question:

How do I convert the resistance number from the VOC sensor to mg/m³? I tried looking up the sensor datasheets but couldn’t find the answer. The datasheets suggest that clever algorithms based on the relative humidity and other unstated factors can be used to determine an AQI-like abstract value of “cleanliness” for the air, but I would prefer a more concrete unit, even if such an algorithm was well-defined.