Sht30 dongle

This repo contains everything to build a system for monitoring temperature and humidity in a building. Dedicated sensors are built to measure and send the data via Http API to a host server. The collected data is stored and visualized with a web interface.

Sensor design

The Sensor is based on the SHT30 IC from Sensiron, a digital temperature and humidity sensor. https://sensirion.com/products/catalog/SHT30-DIS-B

A custom PCB was designed to read the sensor from a raspberry zero w.

SHT30 dongle:

Sensor Software

The sensor is read via the I2C bus using a python script.
The dongle features 3 status LED (red, green and orange).
A systemd service and timer unit are logging the data as a separated, dedicated system user (mydongle).
Data is written to a sambda drive, then copyed to local NAS an visualized using a webserver (other project).

Usage

Copy SHT30_software and setup.sh to your Raspberry with attached dongle.
Run chmod +X setup.sh, then sudo ./setup.sh to finish installation. The device will start logging climatic data.
Verify the running service:
systemctl status mydongle.service or systemctl status mydongle.timer

{"time": "Mon Feb 24 11:22:41 2025", "temperature": 14.16, "humidity": 59.68, "timestamp": 1740392561.3886838, "hostname": "cellar"}

That's it.

written by P4sxal 2024-2025