RaspberryPi Zero/2 W, 3,4 (Not yet tested on Pi 1,2 but should work I guess?)
Connect the sensor to the Pi
| Pi GPIO | BME280 |
|---|---|
| 17 (3V3) | Vin |
| 6 (Gnd) | Gnd |
| 3 (SDA) | SDA (SDI) |
| 5 (SCL) | SCL (SCK) |
If you happen to already have some other i2c device/sensor/display connected to pin 3,5 then you can enable another i2c bus by adding the following line to your /boot/config.txt file:
dtoverlay=i2c-gpio,bus=2,i2c_gpio_sda=22,i2c_gpio_scl=23
And then you can connect the sda and scl to the above mention gpio pins (Pin 15,16 in this case)
Clone this repository:
git clone https://github.com/spandan13/RaspberryPi-BME280-WeatherStation.git
Make sure you have sqlite3 installed:
sudo apt install sqlite3
CD to the cloned repo and install the requirements:
pip3 install -r requirements.txt
Open the sample-settings file and set the values:
| Setting | Value |
|---|---|
| lat | Your location lattitude |
| lon | Your location longitute |
| api_key | Your OpenWeatherMap API Key |
| port | Default is 1 but needs to be changed to 2 if set new bus in config.txt |
| address | Default is 0x76, Some BME280 use 0x77 |
| server_name | Whatever name you want the Dashboard to show |
| server_port | Port for the web dashboard |
| db_file | Full path to database file. The file will be created if it does not exist |
Rename the sample-settings file to settings
python3 bme-test.py
If you see Temp, Humidity and Pressure values returned then you're good to go!
Now, we need to create db file and the required table to store the values:
python3 create_db.py
And now we need to set-up a cron job that will log values to the db at the interval you set.
Add below line to your cron file crontab -e (This logs every 5 minutes)
*/5 * * * * cd /full/path/to/repo/ && python3 log_to_db.py
python3 bme_app.py
Navigate to http://your-pi-ip:port and you should see the dashboard up and running!