Made For ESPHome
 
The Bluetooth proxy function is enabled by default
 
The SCD4x is Sensirion’s next generation miniature CO2 sensor. This sensor builds on the photoacoustic NDIR sensing principle and Sensirion’s patented PASens® and CMOSens® technology to offer high accuracy at an unmatched price and smallest form factor. SMD assembly allows cost- and space-effective integration of the sensor combined with maximal freedom of design. On-chip signal compensation is realized with the built-in SHT4x humidity and temperature sensor. CO2 is a key indicator for indoor air quality (IAQ) as high levels compromise humans’ cognitive performance and well-being. The SCD4x enables smart ventilation systems to regulate ventilation in the most energy-efficient and human-friendly way. Moreover, indoor air quality monitors and other connected devices based on the SCD4x can help maintain low CO2 concentration for a healthy, productive environment.

Input：USB 5V 1A
Wi-Fi Type：2.4Ghz
Wi-Fi chip: ESP32C3
CO₂ Measurement Range: 400 ppm ～ 2,000 ppm
Accuracy: ± 50 ppm
 
Features:
High-Precision Measurement
Built-in automatic calibration function improves data reliability.
 
GPIO
SDA：GPIO10
SCL：GPIO8
WS2812：GPIO21
Button：GPIO9