A sensor data logger for various I2C sensor devices for CircuitPython using MQTT.
- SHT4x Temperature / Humidity
- BME680 Temperature / Humidity / Pressure
- BMP3xx Pressure
- SCD4x CO2
- SGP40 VOC index (air quality)
- Light sensor (BH1750, VEML7700)
- Magnetometer MMC56x3
more to come ...
| CircuitPy version | Bundle release |
|---|---|
| 8.x | 20240423 |
| 9.x (9.2.4) | 20250224 |
The installer install.py is configured to download and install the bundle release for CircuitPython 9.x by default.
| Step | Color |
|---|---|
| WLAN connect | yellow |
| NTP update | magenta |
| MQTT connect / update | white |
| Sensor detection | cyan |
| Sensor readout | blue |
| Operation | green -> red |
WIFI_SSID = "SSDF"
WIFI_PASSWORD = "XZCXCZXC"
MQTT_HOST="mqtt"
MQTT_PREFIX="sensors/test"
ELEVATION="530"
By default the following sensors are mapped to their default I2C addresses:
| I2C address | sensor name |
|---|---|
| 16 | VEML7700 |
| 35 | BH1750 |
| 48 | MMC56x3 |
| 68 | SHT4x |
| 89 | SGP40 |
| 98 | SCD4x |
| 119 | BMP3xx |
As the address to sensor mapping might not be unique there can be an override through the configuration:
DEVICE_MAP="119=BME680"
mapping the real address to one of the supported sensor names: SHT4x, SGP40, SCD4x, BMP3xx, BME680, ...
Run ./install.py which will copy all relevant dependencies and the sources to /Volumes/CIRCUITPY when connecting a CircuitPython device.