Basically based on the extraordinary work of Thingpulse and their Graph-Library. Also many thanks to Joerg, who did elementary and great work on BME680 getting TVOC out of resistance reading without the need of BSEC-Implementation!
2.4 inch TFT-Display with socket for WEMOS D1 mini. See Board@ Wemos TFT. I was using this BME680-Breakout-Board from kriswiner. Making also use of Adafruit BME680-Library.
Thanks to all folks on FHEM, for their heavy development work!