ccs811

http://blog.akanumahiroaki.com/entry/2018/06/12/080000

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#include <SparkFunCCS811.h>

#define CCS811_ADDR 0x5A

CCS811 mySensor(CCS811_ADDR);

void setup() {
Serial.begin(115200);
Serial.println("CCS811 Basic Example");

CCS811Core::status returnCode = mySensor.begin();
if (returnCode != CCS811Core::SENSOR_SUCCESS)
{
Serial.println(".begin() returned with an error.");
while (1);
}
}

void loop() {
if (mySensor.dataAvailable())
{
mySensor.readAlgorithmResults();

Serial.print("CO2[");
Serial.print(mySensor.getCO2());
Serial.print("] tVOC[");
Serial.print(mySensor.getTVOC());
Serial.print("] millis[");
Serial.print(millis());
Serial.print("]");
Serial.println();
}

delay(10);
}