Is My Thermostat Lying? Designing a Low-Power Multi-Sensor Node (Series)

A Cruel Thermostat I'm sure many of you can relate to the lies that our thermostats push to us every day, 68 degrees my foot. Jokes aside, it's well established that the temperature across the room is not constant, with variation from the floor to ceiling, as well as local hot-spots near heat generating equipment or personnel. This creates a need for localized heat monitoring to track and log these hot-spots. Where There's One There's Another Additionally, in spaces with large heat generation, specifically from additive manufacturing or soldering, there is a marked increase in VOC, NOx, and CO2 generating. This poses several risks to occupants, from CO2 accumulation, to long term health degradation from exposures to VOCs such as styrene. Engineering a solution To track and monitor these quantities, I began work on a small air quality monitoring project. The first version began as a DHT11 connected to a raspberry pi pico. But after its untimely destruction, and with the accuracy of the