DF Robot Air Quality Sensor - CCS811

CCS811 Air Quality Sensor can measure the eCO2 (equivalent CO2) and TVOC (Total Volatile Organic Compounds) density. It can be widely used in many applications, such as air quality detection, air purifiers, ventilation system and so on. This CCS811 air quality sensor uses AMS's unique micro-hot plate technology. Compared to conventional gas sensors, this sensor has lower power consumption and a small form factor (only 16 x 15mm). Internally integrated ADCs and MCUs allow data to be collected, calculated, and returned via IIC. The CCS811 supports a concentration alarm, which is triggered when the concentration exceeds the user-set threshold.

The CCS811 air quality sensor supports multiple modes, such as detect in every second, in every 10s, in every one minute, in every 250ms and sleep mode. These modes are optimized for low power consumption during the sensor measurement, so the CCS811 is also suitable for portable applications.

Quick Spec

• Operating Voltage: 3.3V~5.5V
• Warm-up Time: <15s
• I2C Address: 0x5A (in default) / 0x5B
• Operating Temperature: -40 ~ 85°C
• Operating Humidity: 10%RH ~ 95%RH
• eCO2 Measuring Range: 400 ~ 8000ppm
• TVOC Measuring Range: 0ppb ~ 1100ppb
• Dimension: 16 x 20mm
• Net Weight: 8g

The effects of carbon dioxide and TVOC on the human body

Pinout

Wiring Diagram

Sample Code

/*!
 * @file getBaseLine.ino
 * @brief Put the module in clear air and work a few minutes, wait for baseline doing not change 
 * @n Experiment phenomenon: get
 * @copyright    Copyright (c) 2010 DFRobot Co.Ltd (https://www.dfrobot.com)
 * @licence     The MIT License (MIT)
 * @author [LuoYufeng](yufeng.luo@dfrobot.com)
 * @version  V0.1
 * @date  2019-07-19
 * @https://github.com/DFRobot/DFRobot_CCS811
 */
#include "DFRobot_CCS811.h"


/*
 * IIC address default 0x5A, the address becomes 0x5B if the ADDR_SEL is soldered.
 */
//DFRobot_CCS811 sensor(&Wire, /*IIC_ADDRESS=*/0x5A);
DFRobot_CCS811 sensor;

void setup(void)
{
    Serial.begin(115200);
    /*Wait for the chip to be initialized completely, and then exit*/
    while(sensor.begin() != 0){
        Serial.println("failed to init chip, please check if the chip connection is fine");
        delay(1000);
    }
    /**
     * @brief Set measurement cycle
     * @param cycle:in typedef enum{
     *                  eClosed,      //Idle (Measurements are disabled in this mode)
     *                  eCycle_1s,    //Constant power mode, IAQ measurement every second
     *                  eCycle_10s,   //Pulse heating mode IAQ measurement every 10 seconds
     *                  eCycle_60s,   //Low power pulse heating mode IAQ measurement every 60 seconds
     *                  eCycle_250ms  //Constant power mode, sensor measurement every 250ms
     *                  }eCycle_t;
     */
    sensor.setMeasCycle(sensor.eCycle_250ms);
}
void loop() {
    if(sensor.checkDataReady() == true){
        /*!
         * @brief Set baseline
         * @return baseline in clear air
         */
        Serial.println(sensor.readBaseLine(), HEX);

    } else {
        Serial.println("Data is not ready!");
    }
    //delay cannot be less than measurement cycle
    delay(1000);
}

Resources

• Product Page
• Product Wiki
• Schematic
• Mechanical Diagram
• CCS811 Datasheet
• CCS811 Baseline

Shipping List

• 1 x DF Robot Air Quality Sensor - CCS811
• 1 x 2.54-7P Black Single Row Pin