it’s defined right there in Arduino.h. Great stuff! The I2C (“Wire”) library has also gotten the ESP32 treatment, and worked just as it should with an LM75 temperature sensor. This is my ...

If you want to maintain detailed logs of the environmental parameters, you can host a database on your Raspberry Pi and connect it to the ESP32 over the MQTT protocol. Considering ...

Particulate matter is measured by an SDS011 particulate matter sensor. This device contains a laser, and detects light scattered ... The build makes use of an ESP32 as the brains of the operation ...