BMP388 Pressure & Temperature Sensor - Basic continuous measurements

This page contains a simple example showing how to take continuous measurements with the BMP388 and print them to the Serial monitor.

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Connections for this example

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Initialization

To use the BMP388 sensor, first include the required library, create the sensor object, and initialize the sensor in the setup() function, along with setting its calibration parameters

// Include Soldered BMP388 library.
#include <BMP388-SOLDERED.h>

// Create BMP388 sensor object.
Soldered_BMP388 bmp388;

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

    // Initialize sensor (check for sensor). Notify if init failed.
    // Also, this will set BMP388 sensor into sleep mode.
    if (!bmp388.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.
    bmp388.setSeaLevelPressure(1025.0);

    // Set the standby time of each sample to be roughly 1.3 seconds.
    bmp388.setTimeStandby(TIME_STANDBY_1280MS);

    // Start BMP388 continuous conversion in normal mode.
    bmp388.startNormalConversion();

bmp388.begin()

Initializes the BMP388 sensor, setting up communication over I2C

Returns value: uint8_t value, 1 if initialization was successfull, 0 if not

bmp388.setSeaLevelPressure(float pressure)

Sets the sea level value of pressure, used in calculating altitude

Returns value: None

Function parameters:

Type	Name	Description
float	pressure	Pressure value in hPa

bmp388.setTimeStandby(enum TimeStandby standby)

Set the standby time of each sample

Returns value: None

Function parameters:

Type	Name	Description
enum TimeStandby	standby	Time the sensor will be asleep between each measurement

bmp388.startNormalConversion()

Start BMP388 continuous conversion in normal mode.

Returns value: None

Getting all readings

In the loop() function, we forward the variables in which we want to store the calculated measurements and print them to the serial monitor:

void loop()
{
    // Variables for storing measurement data.
    float temperature, pressure, altitude;

    // Check if the data is ready.
    if (bmp388.getMeasurements(temperature, pressure, altitude))
    {
        // Print the results.
        Serial.print(temperature);
        Serial.print(F("*C   "));
        Serial.print(pressure);
        Serial.print(F("hPa   "));
        Serial.print(altitude);
        Serial.println(F("m"));
    }
}

bmp388.getMeasurements(volatile float &temperature, volatile float &pressure, volatile float &altitude);

Gets measurements from the sensor if the sensor is ready to do so

Returns value: uint8_t value, 1 if the data is ready to be read, 0 if not

Function parameters:

Type	Name	Description
volatile float&	temperature	Variable in which the temperature value will be stored
volatile float&	pressure	Variable in which the pressure value will be stored
volatile float&	altitude	Variable in which the altitude value will be stored

Serial monitor

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Full Example

You can find the full example below:

// Include Soldered BMP388 library.
#include <BMP388-SOLDERED.h>

// Create BMP388 sensor object.
Soldered_BMP388 bmp388;

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

    // Initialize sensor (check for sensor). Notify if init failed.
    // Also, this will set BMP388 sensor into sleep mode.
    if (!bmp388.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.
    bmp388.setSeaLevelPressure(1025.0);

    // Set the standby time of each sample to be roughly 1.3 seconds.
    bmp388.setTimeStandby(TIME_STANDBY_1280MS);

    // Start BMP388 continuous conversion in normal mode.
    bmp388.startNormalConversion();
}

void loop()
{
    // Variables for storing measurement data.
    float temperature, pressure, altitude;

    // Check if the data is ready.
    if (bmp388.getMeasurements(temperature, pressure, altitude))
    {
        // Print the results.
        Serial.print(temperature);
        Serial.print(F("*C   "));
        Serial.print(pressure);
        Serial.print(F("hPa   "));
        Serial.print(altitude);
        Serial.println(F("m"));
    }
}