The mqtt-sht30-homie project is a simple and easy to integrate temperature and humidity sensor setup similar to my other project with BME280 sensor. I use this sensor in a hidden area, therefor it has no display. Sensor data is send via MQTT and processed by my OpenHab setup. The project is built with a cost-effective ESP8266 WiFi chip, Wemos D1 mine and sensor are available for a total price lower $10.
The software is based on Homie to enable an easy integration with home automation systems like OpenHab.
- ESP8266 (Wemos D1 mini, Nodemcu)
- SHT30 sensor breakout
- USB power supply and cable
- Enclosure
I got the SHT30 breakout form Wemos as part of a set form Aliexpress, others will do as well. This enclosure keeps everything together.
The following software libraries are used. If using PlatformIO all dependencies are resolved automatically.
- Homie V2 (dev) including dependencies
- Adafruit SHT31 Driver
- Optionally PlatformIO environment for building the code
The following config parameters are available via MQTT message (see Homie documentation how to use):
| Parameter | Type | Usage |
|---|---|---|
| sensorInterval | long | temperature reading interval in seconds |
| temperatureOffset | double | temperature offset (-/+) to correct the sensor reading, for example if used in enclosure box |