Air Quality Sensor
This project connects several air quality sensors to ESP32 and exposes it as a REST API with JSON and also Modbus.
The firmware can be found at https://git.ondrovo.com/electro/esp-airsensor where you can also find more details in the README.
There is nothing particular about the design worth noting. It works longterm except for the CO2 sensor which is rather flaky. I can’t recommend this model. It’s powered by an old phone charger.
One fun thing I did with this was detecting shockwaves from that volcano eruption sometime in 2022 or 2023 that travelled twice around the planet. I then set up detection and alerting for these but it hasnt happened again since (and probably the alerting no longer works)
