ENS160 Air Quality Sensor Module - I2C & SPI Interface

The ENS160 module operates from 1.71V to 3.6V DC. The logic pins (I2C and SPI) are also rated for this same voltage range. It is not 5V tolerant. You must use a logic level converter if interfacing with a 5V microcontroller like an Arduino Uno.

The ENS160 uses I2C with a default 7-bit address of 0x52 (0x29 in 8-bit write format). The address can be configured to 0x53 via a pin setting. Ensure your microcontroller's I2C bus uses 3.3V logic. The sensor provides standard I2C read/write registers for accessing eCO₂, TVOC, and AQI data.

The ENS160 features an Automatic Baseline Correction (ABC) algorithm that self-calibrates over a typical period of 24-48 hours of continuous operation in a known clean-air environment. No manual calibration is required for standard use. For optimal initial accuracy, a short burn-in period is recommended.

The ENS160 module is designed for indoor air quality monitoring. It is not sealed against water or dust (lacks an IP rating). Exposure to direct moisture, condensation, or extreme particulate contamination can damage the MEMS sensing element and affect readings. Use in controlled indoor environments is advised.

The eCO₂ (equivalent CO₂) value is calculated by the ENS160's algorithm based on its detection of VOCs and other gases, estimating the CO₂ concentration that would cause a similar sensor response. It is not a direct measurement of CO₂ like an NDIR sensor provides. eCO₂ is useful for general air quality trending but should not be used for applications requiring precise CO₂ concentration measurement.