Interesting Sources

How to use Visual Studio Code and Arduino extension https://maker.pro/arduino/tutorial/how-to-use-visual-studio-code-for-arduino
https://platform.io/ ist laut IS eine gute Alternative IDE
MicroPython für ESP32 http://docs.micropython.org/en/latest/esp32/quickref.html
Unhackbar CO2 Ampel Project https://git.unhb.de/smash/co2ampel
uses ESPHome https://esphome.io/

Interesting sensors

MH-Zxx for CO2: MH-Z19 bis 0.5% oder MH-Z14A bis 5% oder MH-Z16, see https://charlottemach.com/2020/05/17/co2-sensor-raspi.html
BME280 : humidity, temperature and pressure
Dust: MQ135
VOC / gases: ?
Lautstärke: Mikrophone?
Brightness: ?

Shopping Ideas

Pi Zero

Bought

e-ink Display for Raspi / Arduino https://www.waveshare.com/2.9inch-e-Paper-HAT-D.htm
OLED Display
BME280
MH-Z19
MH-Z14B