I've built my own "IoT" Sensors by hooking up a bunch of components to an ESP32 on a breadboard. I ended up going with: - CO2: Sensirion SCD30 - Particulates:

I've built my own "IoT" Sensors by hooking up a bunch of components to an ESP32 on a breadboard. I ended up going with: - CO2: Sensirion SCD30 - Particulates: Amphenol SM-UART-04L - VOC: Sensirion SGP30 - Temperature/humidity/pressure: Bosch BME680 After hooking everything up I just wrote some code to pipe sensor readings to InfluxDB, which is connected to Grafana. In the end I have no way of properly testing accuracy but the sensors are consistent between units and behave as expected when exposed to fresh air, which is the most I can look at right now.