Si7021PythonWebserver

Website showing Si7021 temperature and relative humidity measurements. (Python, Raspberry Pi)

Setup

• Enable Raspberry Pi I2C using: sudo raspi-config nonint do_i2c 0
• Connect sensor to Raspberry Pi
• Ensure smbus and flask are installed: pip3 install smbus flask
• Store si7021_webserver.py to /home/<INSERT YOUR USERNAME HERE>/si7021sensor/si7021_webserver.py
• run python3 /home/<INSERT YOUR USERNAME HERE>/si7021sensor/si7021_webserver.py
• open website via browser: http://<RaspberryPisIP>

[Optionally] Setup a systemd service for auto start when booting Raspberry Pi

• Modify si7021_webserver.service according to hints within file
• Store si7021_webserver.service to /lib/systemd/system/si7021_webserver.service
• set permission sudo chmod 644 /lib/systemd/system/si7021_webserver.service
• reload sudo systemctl daemon-reload
• enable auto start sudo systemctl enable si7021_webserver.service
• reboot sudo reboot
• after reboot the service should start automatically.

Warning

Flasks webserver is a development webserver. Use a production WSGI server for non-private networks.