Bmp280 - Initialization

This page contains simple examples with function documentation on how to take measurements using the BMP280 temperature and pressure sensor.

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Connections for this example

[IMAGE PLACEHOLDER - Connections]

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Initialization

To use the BMP280 sensor, first include the required library, create the sensor object and initialize the sensor in the setup() function. For accurate altitude readings, set the current pressure at sea level with bmp280.setSeaLevelPressure()

// Include Soldered BMP280 library
#include <BMP280-SOLDERED.h>

// Create BMP280 sensor object.
Soldered_BMP280 bmp280;

void setup()
{
    // Initialize serial communication at 115200 bauds.
    Serial.begin(115200);

    // Initialize sensor (check for sensor). Notify if init failed.
    // Also, this will set BMP280 sensor into sleep mode.
    if (!bmp280.begin())
    {
        // Print error message.
        Serial.println("Sensor not found! Check your wiring!");

        // Stop the code!
        while (1)
        {
            // Delay for ESP8266.
            delay(10);
        }
    }

    // Set current pressure at sea level to get accurate altitude readings.
    bmp280.setSeaLevelPressure(1020.6);

    // Set the pressure oversampling to X4
    // bmp280.setPresOversampling(OVERSAMPLING_X4);

    // Set the temperature oversampling to X1
    // bmp280.setTempOversampling(OVERSAMPLING_X1);

    // Set the IIR filter to setting 4
    // bmp280.setIIRFilter(IIR_FILTER_4);
}

bmp280.begin()

Initializes the BMP280 sensor, setting up communication over I2C and retrieving calibration data from device

Returns value: Boolean value, returns 1 if sensor was properly initialized, 0 if not.

setSeaLevelPressure()

Modifies the internal sea_level_pressure valiable for more precise readings.

Function parameters:

Type	Name	Description
double	pressure	Variable that changes the internal sea_level_pressure variable.