- ESP32
- MH-Z19 CO2 sensor
- 6x 10mm LEDs
- 6x 68 Ohm resistors
- PCB or perfboard
- show the CO2 level on the six leds
look at my EasyEDA project: https://easyeda.com/koning.unauwen/co2measure_copy
- download Arduino IDE
- install ESP32 core
- upload program
- data to database (influxdb) via WiFi
- display data with grafana
If something is wrong, not clear, doesn't work or could be designed better, feel free to create an issue.