File content as of revision 1:91de8a17fbea:

#include "mbed.h"
#include "BME280.h"
#include "CCS811.h"
#include "Adafruit_SGP30.h"
#include <iostream>

using namespace std;
/*------------------------------------------------------------------------------
Before to use this example, ensure that you an hyperterminal installed on your
computer. More info here: https://developer.mbed.org/handbook/Terminals

The default serial comm port uses the SERIAL_TX and SERIAL_RX pins (see their
definition in the PinNames.h file).

The default serial configuration in this case is 9600 bauds, 8-bit data, no parity

If you want to change the baudrate for example, you have to redeclare the
serial object in your code:

Serial pc(SERIAL_TX, SERIAL_RX);

Then, you can modify the baudrate and print like this:

pc.baud(115200);
pc.printf("Hello World !\n");
------------------------------------------------------------------------------*/
Serial pc(SERIAL_TX, SERIAL_RX);
I2C i2c(PB_7, PB_8);
DigitalOut led(LED1);
//BME280 bme(PB_7, PB_8);
//Adafruit_SGP30 sgp(PB_7, PB_8);
CCS811 ccs(i2c, pc);

uint16_t eco2, tvoc;
//float temp, hum, pres;

void CCS811Initialize(void){
    bool ccs_status = false;
    while(ccs_status == false){
        printf("Initialize CCS811 \n");
        ccs.init();
        ccs_status = !ccs.checkHW();
        cout << "CCS Status: " << ccs_status << endl;
    }  
}

void CCS811Callback(void){
    ccs.readData(&eco2, &tvoc);
    printf("eCO2 reading :%dppm, TVOC reading :%dppb\r\n", eco2, tvoc);
}

//void BME280Initialize(void){
//    bool bme_status = false;
//    while(bme_status == false){
//        printf("Initialize BME280 \n");
//        bme.initialize();
//        bme_status = true;
//        wait(3); 
//    }  
//}
//    
//
//void BME280Callback(void){
    //bme.start();
//    cout << "BME Read Status: " << bme.get(temp, pres, hum);
//    bme.stop();
//    cout << "Temperature: " << temp << " Pressure: " << pres << " Humidity: " << hum << endl;
//    cout << "Temperature: " << bme.getTemperature() ;
//    cout << " Pressure: " << bme.getPressure();
//    cout << " Humidity: " << bme.getHumidity() << "\r"<< endl;
//}

//void SGP30Initialize(void){
//    bool sgp_status = false;
//    while(sgp_status == false){
//        printf("Initialize SGP30 \n");
//        sgp.begin();
//        sgp_status = sgp.IAQinit();
//        wait(3); 
//    }  
//}
//
//void SGP30Callback(void){
//    sgp.IAQmeasure();
//    cout << "eCO2: " << sgp.eCO2 << " ppm";
//    cout << " TVOC: " << sgp.TVOC << " ppb \r" << endl;
//}
 

int main()
{
    printf("Hello World !\n");
    
//    SGP30Initialize();
//    BME280Initialize();
    CCS811Initialize();
    
    
    while(true) {
        wait(3); // second
        led = !led; // Toggle LED
//        BME280Callback();
//        SGP30Callback();
        CCS811Callback();
    }
}