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/******************************************************************************
BME280Compensated.ino
Marshall Taylor @ SparkFun Electronics
April 4, 2017
https://github.com/sparkfun/CCS811_Air_Quality_Breakout
https://github.com/sparkfun/SparkFun_CCS811_Arduino_Library
This example uses a BME280 to gather environmental data that is then used
to compensate the CCS811.
Hardware Connections (Breakoutboard to Arduino):
3.3V to 3.3V pin
GND to GND pin
SDA to A4
SCL to A5
Resources:
Uses Wire.h for i2c operation
Development environment specifics:
Arduino IDE 1.8.1
This code is released under the [MIT License](http://opensource.org/licenses/MIT).
Please review the LICENSE.md file included with this example. If you have any questions
or concerns with licensing, please contact techsupport@sparkfun.com.
Distributed as-is; no warranty is given.
******************************************************************************/
#include <SparkFunBME280.h>
#include <SparkFunCCS811.h>
#define CCS811_ADDR 0x5B //Default I2C Address
//#define CCS811_ADDR 0x5A //Alternate I2C Address
#define PIN_NOT_WAKE 5
//Global sensor objects
CCS811 myCCS811(CCS811_ADDR);
BME280 myBME280;
void setup()
{
Serial.begin(9600);
Serial.println();
Serial.println("Apply BME280 data to CCS811 for compensation.");
//This begins the CCS811 sensor and prints error status of .begin()
CCS811Core::status returnCode = myCCS811.begin();
Serial.print("CCS811 begin exited with: ");
//Pass the error code to a function to print the results
printDriverError( returnCode );
Serial.println();
//For I2C, enable the following and disable the SPI section
myBME280.settings.commInterface = I2C_MODE;
myBME280.settings.I2CAddress = 0x77;
//Initialize BME280
//For I2C, enable the following and disable the SPI section
myBME280.settings.commInterface = I2C_MODE;
myBME280.settings.I2CAddress = 0x77;
myBME280.settings.runMode = 3; //Normal mode
myBME280.settings.tStandby = 0;
myBME280.settings.filter = 4;
myBME280.settings.tempOverSample = 5;
myBME280.settings.pressOverSample = 5;
myBME280.settings.humidOverSample = 5;
//Calling .begin() causes the settings to be loaded
delay(10); //Make sure sensor had enough time to turn on. BME280 requires 2ms to start up.
myBME280.begin();
}
//---------------------------------------------------------------
void loop()
{
//Check to see if data is available
if (myCCS811.dataAvailable())
{
//Calling this function updates the global tVOC and eCO2 variables
myCCS811.readAlgorithmResults();
//printInfoSerial fetches the values of tVOC and eCO2
printInfoSerial();
float BMEtempC = myBME280.readTempC();
float BMEhumid = myBME280.readFloatHumidity();
Serial.print("Applying new values (deg C, %): ");
Serial.print(BMEtempC);
Serial.print(",");
Serial.println(BMEhumid);
Serial.println();
//This sends the temperature data to the CCS811
myCCS811.setEnvironmentalData(BMEhumid, BMEtempC);
}
else if (myCCS811.checkForStatusError())
{
//If the CCS811 found an internal error, print it.
printSensorError();
}
delay(2000); //Wait for next reading
}
//---------------------------------------------------------------
void printInfoSerial()
{
//getCO2() gets the previously read data from the library
Serial.println("CCS811 data:");
Serial.print(" CO2 concentration : ");
Serial.print(myCCS811.getCO2());
Serial.println(" ppm");
//getTVOC() gets the previously read data from the library
Serial.print(" TVOC concentration : ");
Serial.print(myCCS811.getTVOC());
Serial.println(" ppb");
Serial.println("BME280 data:");
Serial.print(" Temperature: ");
Serial.print(myBME280.readTempC(), 2);
Serial.println(" degrees C");
Serial.print(" Temperature: ");
Serial.print(myBME280.readTempF(), 2);
Serial.println(" degrees F");
Serial.print(" Pressure: ");
Serial.print(myBME280.readFloatPressure(), 2);
Serial.println(" Pa");
Serial.print(" Pressure: ");
Serial.print((myBME280.readFloatPressure() * 0.0002953), 2);
Serial.println(" InHg");
Serial.print(" Altitude: ");
Serial.print(myBME280.readFloatAltitudeMeters(), 2);
Serial.println("m");
Serial.print(" Altitude: ");
Serial.print(myBME280.readFloatAltitudeFeet(), 2);
Serial.println("ft");
Serial.print(" %RH: ");
Serial.print(myBME280.readFloatHumidity(), 2);
Serial.println(" %");
Serial.println();
}
//printDriverError decodes the CCS811Core::status type and prints the
//type of error to the serial terminal.
//
//Save the return value of any function of type CCS811Core::status, then pass
//to this function to see what the output was.
void printDriverError( CCS811Core::status errorCode )
{
switch ( errorCode )
{
case CCS811Core::SENSOR_SUCCESS:
Serial.print("SUCCESS");
break;
case CCS811Core::SENSOR_ID_ERROR:
Serial.print("ID_ERROR");
break;
case CCS811Core::SENSOR_I2C_ERROR:
Serial.print("I2C_ERROR");
break;
case CCS811Core::SENSOR_INTERNAL_ERROR:
Serial.print("INTERNAL_ERROR");
break;
case CCS811Core::SENSOR_GENERIC_ERROR:
Serial.print("GENERIC_ERROR");
break;
default:
Serial.print("Unspecified error.");
}
}
//printSensorError gets, clears, then prints the errors
//saved within the error register.
void printSensorError()
{
uint8_t error = myCCS811.getErrorRegister();
if ( error == 0xFF ) //comm error
{
Serial.println("Failed to get ERROR_ID register.");
}
else
{
Serial.print("Error: ");
if (error & 1 << 5) Serial.print("HeaterSupply");
if (error & 1 << 4) Serial.print("HeaterFault");
if (error & 1 << 3) Serial.print("MaxResistance");
if (error & 1 << 2) Serial.print("MeasModeInvalid");
if (error & 1 << 1) Serial.print("ReadRegInvalid");
if (error & 1 << 0) Serial.print("MsgInvalid");
Serial.println();
}
}