Bme680 - Measuring temperature, humidity and pressure (examples)

All measurements

To get the values for all measurements (temperature, humidity, and pressure), use the readSensorData() function. The sensor retrieves the reading values, stores them in the addresses of the function arguments, and scales the values into the appropriate form.

void loop()
{
  float temperature, humidity, pressure, gas;
  bme680.readSensorData(temperature, humidity, pressure, gas);
  Serial.println(
    "Temperature: "+String(temperature)+"C\n"+
    "Humidity: " + String(humidity) + "%\n" +
    "Pressure: " + String(pressure) + "hPa\n" +
    "Gas: " + String(gas) + "mOhms\n"
  );
  delay(1000); // 1 second delay between measurements
}

Serial monitor

bme680.readSensorData(float &temp, float &humidity, float &pressure, float &gas)

Gets the reading values, stores them in the addresses of the function arguments, and scales the values into the appropriate form.

Returns value: None

Function parameters:

Type	Name	Description
float	temp	Variable in which the temperature value will be stored
float	humidity	Variable in which the humidity value will be stored
float	pressure	Variable in which the pressure value will be stored
float	gas	Variable in which the gas value will be stored

---

Temperature

To get temperature values only, use the readTemperature() function. The sensor samples temperature in degrees Celsius.

void loop()
{
  float temperature;
  // Store the sensor data into the variable
  temperature = bme680.readTemperature();
  // Print the value onto the screen
  Serial.println("Temperature: "+String(temperature)+"C \n");
  delay(1000); // 1 second delay between measurements
}

⚠️

Because the sensor by itself generates heat, a temperature offset may be needed. Make an independent temperature reading and add an offset if needed:

void loop()
{
  float temperature;
  float offset = 2.5; // If needed, add an offset
  // Store the sensor data into the variable
  temperature = bme680.readTemperature();
  temperature += offset; // Add the offset to the temperature
  // Print the value onto the screen
  Serial.println("Temperature: "+String(temperature)+"C \n");
  delay(1000); // 1 second delay between measurements
}

Serial monitor

bme680.readTemperature()

Reads the value from the sensor and returns the scaled Celsius value

Returns value: Float value of the temperature reading in degrees Celsius

---

Pressure

To get pressure values only, use the readPressure() function. The sensor samples the pressure in hPa.

void loop()
{
  float pressure;
  // Store the sensor data into the variable
  pressure = bme680.readPressure();
  // Print the value onto the screen
  Serial.println("Pressure: "+String(pressure)+"hPa \n");
  delay(1000); // 1 second delay between measurements
}

Serial monitor

bme680.readPressure()

Reads the value from the sensor and returns the scaled hPa value

Returns value: Float value of the pressure reading in hPa

---

Humidity

To get humidity values only, use the readHumidity() function. The sensor samples humidity as a percentage.

void loop()
{
  float humidity;
  // Store the sensor data into the variable
  humidity = bme680.readHumidity();
  // Print the value onto the screen
  Serial.println("Humidity: "+String(humidity)+"% \n");
  delay(1000); // 1 second delay between measurements
}

Serial monitor

bme680.readHumidity()

Reads the value from the sensor and returns the scaled percentage value

Returns value: Float value of the humidity reading in %