For the project I used this KeeYees kit that can be purchased at this link: https://www.amazon.it/KeeYees-GY-BME280-Atmosferica-Temperatura-Breadboard/dp/B07T2H5QXC ...
Sensirion's Gas Index Algorithm software provides a VOC and an NOx Index output signal calculated from the SGP40/41 raw signal inputs SRAW_VOC and SRAW_NOX. Note: for SGP40, only SRAW_VOC is available ...