With this library you can read out the VOC index from the Sensirion SGP 40 Sensor.
Installation: Connect the Sensirion SGP40 sensor to the Raspberry Pi.
- GND
- VDD
- SDA
- SCL
note that I2c is switched on on your Raspberry Pi.
Attention. if you
sudo i2cdetect -y 1
the sensor will not be displayed. this does not mean that the sensor is not working.
Download the files and run sudo python3 example_sgp40_voc_index.py
the allgerutmuss now calculates with a default value of 50 %rh and 25°C
To achieve a more realistic accuracy you can connect a SHT30 sensor and run sudo example_sgp40_and_sht30_voc_index.py
You can of course also use another temperature and humidity sensor.
To do this, change
sgp40.set_envparams() in the loop