<p>This module integrates two sensor chips CCS811 and HDC1080 on one board. The measured values of the two sensors can be read separately by IIC communication. The HDC1080 is a low power, high precision, miniature digital temperature and humidity sensor chip.</p> <p>The CCS811 is a low-power miniature gas digital sensor for air quality monitoring. A metal oxide (MOX) sensor is integrated to measure the total equivalent volatile organic compound eTVOCs and equivalent eCO2 content. A microcontroller MCU is integrated inside the chip.</p> <p>The gas content value measured by CCS811 is self-corrected by reading the temperature and humidity value of the HDC1080 sensor and writing it to the CCS811 internal environment temperature and humidity correction register.</p> <p>CCS811 Parameters: Power supply: recommended 3.3V, Power consumption: up to 60mW, IIC communication frequency: 400KHz, eTVOC detection range: 0 ~ 32768ppb, eCO2 detection range: 400 ~ 32768ppm, Automatic correction time for metal oxide sensitive layer: 24H, Allow configuration and read sensor time after power up: at least 20 minutes.</p> <p>HDC1080 Parameters</p> <p>Working temperature: -20 Celsius ~ 70 Celsius</p> <p>Humidity sensor measurement range: 0 ~ 100% RH</p> <p>Humidity sensor accuracy: 14 bits error +\/- 2% RH</p> <p>Humidity repeatability accuracy: +\/- 0.1% RH</p> <p>Humidity sensor response time: 15s</p> <p>Humidity conversion time: 8 bits 2.5ms, 11 bits 3.85ms, 14 bits 6.5ms</p> <p>Temperature sensor error: +\/- 0.4 Celsius (ambient temperature 5 Celsius ~ 60 Celsius)</p> <p>Temperature repeatability accuracy: +\/- 0.1 Celsius</p> <p>Temperature conversion time: 11 digits 3.85ms, 14 digits 6.5ms</p> <p>IIC communication frequency: 400KHz</p> <p>IIC slave address: 1000000x (x read\/write control bit)</p> <p>Power supply: recommended 3.3V</p> <p>Pin Description</p> <p>ADD: CCS811 slave address selection bit, thedefault is connected to low level 1011010x, connected to high level 1011011x (x bit read and write control bit)</p> <p>: CCS811 reset control terminal, active low, not connected to high level when not in use, do not hang</p> <p>: CCS811 measurement end or over-threshold interrupt source output low level</p> <p>WAK: CCS811 control input, active low</p> <p>SDA: CCS811 and HDC1080 common IIC data signal lines</p> <p>SCL: CCS811 and HDC1080 common IIC clock signal lines</p> <p>VCC: CCS811 and HDC1080 common power supply terminal</p> <p>Colour: purple</p> <p>Material: plastic</p> <p>Package Contents:</p> <p>1 * Sensor module</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>