#include <stdlib.h>
#include <Wire.h>
#include "SparkFunCCS811.h"

#define pSDA 2
#define pSCL 14
#define DATA_MAX_IDX 50
#define MLX60914_I2C_ADDR 0x5a
#define CSS811_I2C_ADDR 0x5b

// Glbal objects for sensors
CCS811 myCCS811(CSS811_I2C_ADDR);

// Variables to save values from sensors
long long int dtVOC[DATA_MAX_IDX] = {0};
long long int dCO2[DATA_MAX_IDX] = {0};
int i = 0;

void setup(){
  Serial.begin(115200);
  Wire.begin(pSDA, pSCL);

  //This begins the CCS811 sensor and prints error status of .beginWithStatus()
  CCS811Core::CCS811_Status_e returnCode = myCCS811.beginWithStatus();
  Serial.print("CCS811 begin exited with: ");
  //Pass the error code to a function to print the results
  Serial.println(myCCS811.statusString(returnCode));

  //This sets the mode to 10 second reads, and prints returned error status.
  returnCode = myCCS811.setDriveMode(2);
  Serial.print("Mode request exited with: ");
  Serial.println(myCCS811.statusString(returnCode));
}

void loop(){
  if( myCCS811.dataAvailable() ){
    myCCS811.readAlgorithmResults(); //Calling this function updates the global tVOC and CO2 variables
    dCO2[i] = myCCS811.getCO2();
    dtVOC[i] = myCCS811.getTVOC();
    Serial.print("Iteration: ");
    Serial.println(i);
    Serial.print("CO2[");
    Serial.print(dCO2[i]);
    Serial.print("] -- tVOC[");
    Serial.print(dtVOC[i]);
    Serial.println("]");

    if( !(i % 50) ){
      memset(dCO2, 0, sizeof(dCO2));
      memset(dtVOC, 0, sizeof(dtVOC));
      i = 0;
    }
    i++;
  }
  delay(2000);
}