Dries Buytaert
An ESP32-S3 development board is linked to an SCD41 CO2 and temperature sensor. For scale, a coin and pen are included. The SCD41 sensor is roughly equivalent in size to the coin, and the ESP32-S3 board is about twice the coin's diameter.
A development board with an ESP32-S3 chip (left) connected to a Sensirion SCD41 sensor on the right, which measures CO2 levels and temperature.

· Blog