Example Code for Arduino-Get Baseline

Hardware Preparation

• DFRduino UNO R3 (or similar) x 1
• Gravity: CCS811 Air Quality Sensor x 1
• Jumper wires

Software Preparation

• Arduino IDE
• Download and install the CCS811 Library and examples. (About how to install the library?)

Wiring Diagram

Other Preparation Work

During the first week of running the sensor, it is recommended to save a new baseline every 24 hours. After 1 week of operation, it can be saved every 1-28 days

• Please place it in a fresh air environment (20 minutes or more) to obtain the baseline.
• Different sensors, different measurement cycles have different baselines.

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 (http://www.dfrobot.com)
 * @licence     The MIT License (MIT)
 * @author [LuoYufeng]([email protected])
 * @version  V0.1
 * @date  2019-07-19
 * @get from https://www.dfrobot.com
 * @url 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 CCS811(&Wire, /*IIC_ADDRESS=*/0x5A);
DFRobot_CCS811 CCS811;

void setup(void)
{
    Serial.begin(115200);
    /*Wait for the chip to be initialized completely, and then exit*/
    while(CCS811.begin() != 0){
        Serial.println("failed to init chip, please check if the chip connection is fine");
        delay(1000);
    }
}
void loop() {
    if(CCS811.checkDataReady() == true){
        /*!
         * @brief Set baseline
         * @return baseline in clear air
         */
        Serial.println(CCS811.readBaseLine(), HEX);
        
    } else {
        Serial.println("Data is not ready!");
    }
    //delay cannot be less than measurement cycle
    delay(1000);
}

Result

After a while, the baseline reaches to a stable value.