Raspberry Pi application which logs temperature, humidity, and pressure data from an attached BME280 sensor to InfluxDB. I use this at home to keep a history of weather conditions.
Connect the sensor to the 3.3V/ground and I2C pins on the Raspberry Pi. For the Pi Zero (W) and Pi 3B+ or 4B, these pins are:
- Pin 1: 3.3v
- Pin 3: I2C SDA
- Pin 5: I2C SCL
- Pin 6: Ground
Here's a reference page for the Pi Zero's GPIO pins. Those pin numbers may also apply to older/other Pi models; I'm not 100% sure, however, and I don't use any other Pi models at home.
Finally, run sudo raspi-config and enable I2C in the Interface Options section.
Build a binary for your target architecture. For the Raspberry Pi Zero W, this looks like:
env GOOS=linux GOARCH=arm GOARM=6 go build -o ~/tmp/pi-bme280-influx-logger .
Copy the resulting binary to your Raspberry Pi (I put it in /usr/local/bin).
Copy piwx.service to your Pi, in /etc/systemd/system, and edit it to configure the logger. Enable and start it (replacing piwx.service if you're calling your service something different):
sudo systemctl daemon-reload
sudo systemctl enable piwx.service
sudo systemctl start piwx.service
The logger is configured via CLI options:
-elevation-meters float: Elevation in meters. Required for accurate mean sea level pressure readings. Default is Ann Arbor (259.08 m).-fast-sample: Sample faster, mainly useful for debugging.-influx-bucket string: InfluxDB bucket. Supply a string in the formdatabase/retention-policy. For the default retention policy, pass just a database name (without the slash character). Required.-influx-passwordstring: InfluxDB password.-influx-server string: InfluxDB server, including protocol and port, eg.http://192.168.1.2:8086. Required.-influx-username string: InfluxDB username.-log-readings: Log temperature/humidity/pressure readings to standard error.-measurement-name string: Value for the measurement name in InfluxDB. Defaults topi_wx.-sensor-name string: Value for thesensor_nametag in InfluxDB. Required.