/********************* Measurement **************************************/
void measurement() {

#ifdef BME2_USE
  if (bme280Check) {
    bme.read(pressure, temperature, humidity, tempUnit, presUnit);
    yield();
    delay(10);
    bme.read(pressure, temperature, humidity, tempUnit, presUnit);
    yield();
  }
#endif

#ifdef SHT_USE
  if (sht30Check) {
    if (sht.readSample())
    {
      yield();
      humidity = sht.getHumidity();
      yield();
      temperature = sht.getTemperature();
      yield();
    }
  }
#endif

#ifdef SI7021_USE
  if (si7021Check) {
    // Measure Relative Humidity from the HTU21D or Si7021
    humidity = THMeter.getRH();
    yield();
    delay(10);
    // Measure Temperature from the HTU21D or Si7021
    temperature = THMeter.getTemp();
    yield();
    //ToDo Heater https://www.silabs.com/community/sensors/forum.topic.html/when_si7021_is_neede-8a2a
    if (humidity >= 80.0) {
      THMeter.heaterOn();
      delay(50);
      //THMeter.heaterOff();
    }
  }
#endif

#ifdef BH_USE
  if (bh1750Check) {
    //vislight = float(lightMeter.readLightLevel(true, false));
    vislight = lightMeter.readLightLevel(true);
    yield();
    if (vislight > 40000.0 ) {
      if (lightMeter.setMTreg(32)) {
        yield();

      }
    }
    else {
      if (vislight > 10.0 && vislight <= 40000.0 && lightMeter.setMTreg(69))
      {
        yield();
      }
    }
    if (vislight < 10.0) {
      if (lightMeter.setMTreg(254)) {
        yield();
      }
    }
    yield();
    if (vislight < 0.0)
    {
      vislight = -1;
    }
    else {
      vislight = lightMeter.readLightLevel(true);
      yield();
    }

  }
#endif

#ifdef VEML_USE
  if (veml6075Check) {
    //uvMeter.triggerMeasurement();
    delay(10);
    uvMeter.poll();
    yield();
    uvalight = float(uvMeter.getUVA());
    yield();
    uvblight = float(uvMeter.getUVB());
    yield();
    uvi = uvMeter.getUVIndex();
    yield();
    uvMeter.sleep(true);
    yield();
  }
#endif

#ifdef CCS_USE
  if (ccs811Check) {
    yield();
    uint8_t ccs_error = 0;
    // set environmental data
    ccs.setEnvData(temperature, humidity);
    while (digitalRead(CCSINTERRUPT) == HIGH)
    {
      delay(100);
      Serial.print(".");
    }
    // Read the sensor data, this updates multiple fields
    // in the CCS811 library
    ccs.readAlgResultDataRegister();
    if (ccs.hasERROR()) {
      ccs_error = ccs.getERROR_ID();
#ifdef SERIAL_DEBUG
      Serial.println(F("ERROR: CCS811 Error Flag Set"));
      Serial.print(F("INFO: CCS811 Error Register = "));
      Serial.println(ccs_error);
      errorDecode(ccs_error);
      Serial.println();
#endif
      ccs811Check = false;
    }
    if (ccs811Check) {
      // Data is ready
      eco2 = float(ccs.geteCO2());
      tvoc = float(ccs.getTVOC());
    }
#ifdef SERIAL_DEBUG
    //Serial.println(F("ERROR: CCS811 Data Not Ready"));
#endif
  }
#endif
  /******************** SGP30 ********************/
#ifdef SGP30_USE
  if (sgp30Check) {
    yield();
    uint8_t sgp_error = 0;
    // set environmental data
    //sgp.setHumidity(humidity);
    sgp.measureAirQuality();

    // Data is ready
    eco2 = float(sgp.CO2);
    tvoc = float(sgp.TVOC);
  }
#ifdef SERIAL_DEBUG
  //Serial.println(F("ERROR: SGP30 Data Not Ready"));
#endif

#endif
/************************** ADC Measurement *********************************/
#ifdef BATTERY_USE
adc = analogRead(A0);
#ifdef SERIAL_DEBUG
Serial.println("ADC Read:\t" + String(adc) );
#endif
yield();
delay(10);
batt_str = String(float(voltageDivCorrelation(adc) - BATT_MEASUREMENT_OFFSET) / 100);
batt_str.toCharArray(batt, batt_str.length() + 1);
#ifdef SERIAL_DEBUG
Serial.print("Battery Read:\t" + batt_str + " V"  + "\t\t\t");
#endif

#ifdef SERIAL_DEBUG
Serial.print("Publish Battery: \t\t");
#endif
if (! mqttClient.publish(BATTERY_FEED, batt, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
  Serial.println("Failed!");
#endif
}
else {
#ifdef SERIAL_DEBUG
  Serial.println("OK");
#endif
}
yield();
mqttClient.loop();
yield();
delay(10);
#endif
/********************* Temperature **************************************/
#ifdef BME2_USE
if (bme280Check) {
#ifdef SERIAL_DEBUG
  Serial.print("Temperature:\t");
  Serial.print(temperature);
  Serial.print(" °" + String(metric ? 'C' : 'F') );
  Serial.print("\t\t\t");
#endif
  temp_str = String(temperature);
  temp_str.toCharArray(temp, temp_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + temp_str + "°" + String(metric ? 'C' : 'F'));
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish Temperature: \t");
#endif
  if (! mqttClient.publish(TEMPERATURE_FEED, temp, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
  /********************* Pressure **************************************/
#ifdef SERIAL_DEBUG
  Serial.print("Pressure:\t");
  Serial.print(pressure);
  Serial.print(" hPa");
  Serial.print("\t\t");
#endif
  pres_str = String(pressure);
  pres_str.toCharArray(pres, pres_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 16, 128, pres_str + " hPa");
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish Pressure: \t");
#endif
  if (! mqttClient.publish(PRESSURE_FEED, pres, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 16, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 16, 128, "o");
#endif

  }
  mqttClient.loop();
  yield();
  delay(10);
  /********************* Humidity **************************************/
#ifdef SERIAL_DEBUG
  Serial.print("Humidity:\t");
  Serial.print(humidity);
  Serial.print(" %" );
  Serial.print("\t\t\t");
#endif
  hum_str = String(humidity);
  hum_str.toCharArray(hum, hum_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 32, 128, " " + String(hum) + " %");
#endif
#ifdef SERIAL_DEBUG
  Serial.print("Publish Humidity: \t");
#endif

  if (! mqttClient.publish(HUMIDITY_FEED, hum, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "x");
#endif

  }
  else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif
/********************* Temperature **************************************/
#ifdef SHT_USE
if (sht30Check) {
#ifdef SERIAL_DEBUG
  Serial.print("Temperature:\t");
  Serial.print(temperature);
  Serial.print(" °" + String(metric ? 'C' : 'F') );
  Serial.print("\t\t\t");
#endif
  temp_str = String(temperature);
  temp_str.toCharArray(temp, temp_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + temp_str + "°" + String(metric ? 'C' : 'F'));
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish Temperature: \t");
#endif
  if (! mqttClient.publish(TEMPERATURE_FEED, temp, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);

  /********************* Humidity **************************************/
#ifdef SERIAL_DEBUG
  Serial.print("Humidity:\t");
  Serial.print(humidity);
  Serial.print(" %" );
  Serial.print("\t\t\t");
#endif
  hum_str = String(humidity);
  hum_str.toCharArray(hum, hum_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 32, 128, " " + String(hum) + " %");
#endif
#ifdef SERIAL_DEBUG
  Serial.print("Publish Humidity: \t");
#endif

  if (! mqttClient.publish(HUMIDITY_FEED, hum, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "x");
#endif

  }
  else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif //SHT_USE
/********************* Temperature **************************************/
#ifdef SI7021_USE
if (si7021Check) {
#ifdef SERIAL_DEBUG
  Serial.print("Temperature:\t");
  Serial.print(temperature);
  Serial.print(" °" + String(metric ? 'C' : 'F') );
  Serial.print("\t\t\t");
#endif
  temp_str = String(temperature);
  temp_str.toCharArray(temp, temp_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + temp_str + "°" + String(metric ? 'C' : 'F'));
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish Temperature: \t");
#endif
  if (! mqttClient.publish(TEMPERATURE_FEED, temp, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);

  /********************* Humidity **************************************/
#ifdef SERIAL_DEBUG
  Serial.print("Humidity:\t");
  Serial.print(humidity);
  Serial.print(" %" );
  Serial.print("\t\t\t");
#endif
  hum_str = String(humidity);
  hum_str.toCharArray(hum, hum_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 32, 128, " " + String(hum) + " %");
#endif
#ifdef SERIAL_DEBUG
  Serial.print("Publish Humidity: \t");
#endif

  if (! mqttClient.publish(HUMIDITY_FEED, hum, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "x");
#endif

  }
  else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif
/********************* UVA **************************************/
#ifdef VEML_USE
if (veml6075Check) {
#ifdef SERIAL_DEBUG
  Serial.print("UVA:\t\t");
  Serial.print(uvalight);
  Serial.print(" Ctr per mW/cm²" );
  Serial.print("\t");
#endif
  uva_str = String(uvalight);
  uva_str.toCharArray(uva, uva_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 32, 128, " " + String(uva) + " ");
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish UVA: \t\t");
#endif

  if (! mqttClient.publish(UVA_FEED, uva, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "x");
#endif

  }
  else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "o");
#endif

  }
  mqttClient.loop();
  yield();
  delay(10);
  /********************* UVB **************************************/
#ifdef SERIAL_DEBUG
  Serial.print("UVB:\t\t");
  Serial.print(uvblight);
  Serial.print(" Ctr per mW/cm²" );
  Serial.print("\t");
#endif
  uvb_str = String(uvblight);
  uvb_str.toCharArray(uvb, uvb_str.length() + 1);

#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 32, 128, " " + String(uvb) + " ");
#endif
#ifdef SERIAL_DEBUG
  Serial.print("Publish UVB: \t\t");
#endif
  if (! mqttClient.publish(UVB_FEED, uvb, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "x");
#endif

  }
  else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
  /********************* UVIndex **************************************/
#ifdef SERIAL_DEBUG
  Serial.print("UVIndex:\t\t");
  Serial.print(uvi);
  Serial.print("\t\t\t");
#endif
  uvindex_str = String(uvi);
  uvindex_str.toCharArray(uvindex, uvindex_str.length() + 1);

#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 32, 128, " " + String(uvindex) + " ");
#endif
#ifdef SERIAL_DEBUG
  Serial.print("Publish UVIndex: \t\t");
#endif
  if (! mqttClient.publish(UVINDEX_FEED, uvindex, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "x");
#endif
  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "o");
#endif
  }
  mqttClient.loop();
  delay(10);
}
#endif
/********************* visible light **************************************/
#ifdef BH_USE
if (bh1750Check && vislight >= 0.0) {
#ifdef SERIAL_DEBUG
  Serial.print("Light:\t\t");
  Serial.print(vislight);
  Serial.print(" lx" );
  Serial.print("\t\t");
#endif
  light_str = String(int(vislight));
  light_str.toCharArray(light, light_str.length() + 1);

#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 32, 128, " " + String(light) + " lx");
#endif

#ifdef SERIAL_DEBUG
  Serial.print("\tPublish Light: \t\t");
#endif

  if (!mqttClient.publish(LIGHT_FEED, light, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 32, 128, "o");
#endif
  }
  mqttClient.loop();
  delay(10);
}
#endif
/********************* Absolute Humidity **************************************/
#ifdef SHT_USE
if (sht30Check) {
  absHumidity = EnvironmentCalculations::AbsoluteHumidity(temperature, humidity, EnvironmentCalculations::TempUnit_Celsius);
#ifdef SERIAL_DEBUG
  Serial.print("abs Humidity:\t");
  Serial.print(absHumidity);
  Serial.print(" g/m^3");
  Serial.print("\t\t");
#endif
  absHum_str = String(absHumidity);
  absHum_str.toCharArray(absHum, absHum_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + absHum_str + "g/m^3" );
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish abs Humidity: \t");
#endif
  if (! mqttClient.publish(ABSHUMIDITY_FEED, absHum, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif
/********************* Absolute Humidity **************************************/
#ifdef SI7021_USE
if (si7021Check) {
  absHumidity = EnvironmentCalculations::AbsoluteHumidity(temperature, humidity, EnvironmentCalculations::TempUnit_Celsius);
#ifdef SERIAL_DEBUG
  Serial.print("abs Humidity:\t");
  Serial.print(absHumidity);
  Serial.print(" g/m^3");
  Serial.print("\t\t");
#endif
  absHum_str = String(absHumidity);
  absHum_str.toCharArray(absHum, absHum_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + absHum_str + "g/m^3" );
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish abs Humidity: \t");
#endif
  if (! mqttClient.publish(ABSHUMIDITY_FEED, absHum, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif

/********************* Absolute Humidity **************************************/
#ifdef BME2_USE
if (bme280Check) {
  absHumidity = EnvironmentCalculations::AbsoluteHumidity(temperature, humidity, EnvironmentCalculations::TempUnit_Celsius);
#ifdef SERIAL_DEBUG
  Serial.print("abs Humidity:\t");
  Serial.print(absHumidity);
  Serial.print(" g/m^3");
  Serial.print("\t\t");
#endif
  absHum_str = String(absHumidity);
  absHum_str.toCharArray(absHum, absHum_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + absHum_str + "g/m^3" );
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish abs Humidity: \t");
#endif
  if (! mqttClient.publish(ABSHUMIDITY_FEED, absHum, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif

/********************* eCO2 **************************************/
#ifdef CCS_USE
//fix sensors internal wait delay
if (ccs811Check && eco2 > 0.00) {
#ifdef SERIAL_DEBUG
  Serial.print("eCO2:\t\t");
  Serial.print(eco2);
  Serial.print(" ppm");
  Serial.print("\t\t");
#endif
  eco2_str = String(eco2);
  eco2_str.toCharArray(eco2C, eco2_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + eco2_str + "ppm" );
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish eCO2: \t\t");
#endif
  if (! mqttClient.publish(ECO2_FEED, eco2C, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif
/********************* TVOC **************************************/
#ifdef CCS_USE
//fix sensors internal wait delay
if (ccs811Check && eco2 > 0.00) {
#ifdef SERIAL_DEBUG
  Serial.print("TVOC:\t\t");
  Serial.print(tvoc);
  Serial.print(" ppb");
  Serial.print("\t\t");
#endif
  tvoc_str = String(tvoc);
  tvoc_str.toCharArray(tvocC, tvoc_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + tvoc_str + "ppb" );
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish TVOC: \t\t");
#endif
  if (! mqttClient.publish(TVOC_FEED, tvocC, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif

/********************* SGP30 eCO2 **************************************/
#ifdef SGP30_USE
//fix sensors internal wait delay
if (sgp30Check) {
#ifdef SERIAL_DEBUG
  Serial.print("eCO2:\t\t");
  Serial.print(eco2);
  Serial.print(" ppm");
  Serial.print("\t\t");
#endif
  eco2_str = String(eco2);
  eco2_str.toCharArray(eco2C, eco2_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + eco2_str + "ppm" );
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish eCO2: \t\t");
#endif
  if (! mqttClient.publish(ECO2_FEED, eco2C, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif
/********************* TVOC **************************************/
#ifdef SGP30_USE
//fix sensors internal wait delay
if (sgp30Check) {
#ifdef SERIAL_DEBUG
  Serial.print("TVOC:\t\t");
  Serial.print(tvoc);
  Serial.print(" ppb");
  Serial.print("\t\t");
#endif
  tvoc_str = String(tvoc);
  tvoc_str.toCharArray(tvocC, tvoc_str.length() + 1);
#ifdef OLED_OUTPUT
  display.drawStringMaxWidth(0, 0, 128, " " + tvoc_str + "ppb" );
#endif

#ifdef SERIAL_DEBUG
  Serial.print("Publish TVOC: \t\t");
#endif
  if (! mqttClient.publish(TVOC_FEED, tvocC, true, 1) || !mqttClient.loop()) {
#ifdef SERIAL_DEBUG
    Serial.println("Failed!");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "x");
#endif

  } else {
#ifdef SERIAL_DEBUG
    Serial.println("OK");
#endif

#ifdef OLED_OUTPUT
    display.drawStringMaxWidth(110, 0, 128, "o");
#endif
  }
  mqttClient.loop();
  yield();
  delay(10);
}
#endif
/************************************ END *******************************/
mqttClient.loop();
yield();
delay(10);
return;
}