SCD40 ESP32C3 OLED

Compact CO2, temperature and humidity sensor for Home Assistant via ESP Home

Parts:

ESP32C3 OLED from Aliexpress (£2.50 each) https://www.aliexpress.com/item/1005009534750048.html

SCD40 (£11 each) https://www.aliexpress.com/item/1005006682069916.html

I don't know if my ESP Home code is optimal but it works. So far, working great.

Checks the SCD40 and ESP32 internal SOC temp every 60s and reports to HA.

3D printed case is basic but friction fits together solidly enough.

ESPHome Config in the txt file