This Cubic CM1106 series NDIR CO2 gas sensor module, engineered by Cubic Sensor and Instrument Co., Ltd.. This high-precision, single-beam sensor utilizes infrared technology to accurately measure carbon dioxide levels in indoor environments.The hardware includes a distinct single-row interface port for integrated communication over UART or I2C protocols, allowing smooth connections to microcontrollers such as ESP8266 or Arduino for smart home automation. It is commonly used in commercial and residential HVAC systems, indoor air quality monitors, demand control ventilation (DCV) setups, and air purifiers.