Hardware
Current hardware setup, includes support for (total cost about 22€):
- Wemos Lolin32 OLED Board and clones (ESP-WROOM-32).
- MH-Z19B CO2 Sensor (0-5000ppm +/-50ppm range).
As the ESP module is able to run supplied from standard USB Smartphone charger, it is only need to wire 4 cables between ESP module and MH-Z19B Sensor:
| ESP module | MH-Z19B Sensor |
|---|---|
| 5V | Vin |
| GND | GND |
| PIN 25 | Tx |
| PIN 26 | Rx |
MIT License.
