Example Code for Arduino-Pressure Temperature Altitude Detection

Hardware Preparation

• DFRduino UNO R3 (or similar) x 1
• BMP388 Digital Pressure Sensor Module x1
• Jumper wires

Software Preparation

• Arduino IDE

Wiring Diagram

Connect this module with UNO board via I2C port.

Other Preparation Work

Download BMP388 Library. About how to install a library?

Sample Code

#include <DFRobot_BMP3XX.h>

/* If using Gravity products, choose these two interfaces and comment subsequent interfaces. */
// DFRobot_BMP388_I2C sensor;
// DFRobot_BMP390L_I2C sensor;

/**
 * Select the chip version BMP388/BMP390L
 * Select communication interface I2C, please comment out SPI interface.
 * I2C communication address settings: eSDOGND: connect SDO pin to GND, I2C address is 0×76 now.
 *                   eSDOVDD: Connect SDO pin to VDDIO (3v3), I2C address is 0×77 now
 */
// DFRobot_BMP388_I2C sensor(&Wire, sensor.eSDOVDD);
DFRobot_BMP390L_I2C sensor(&Wire, sensor.eSDOVDD);

/**
 * Select chip version BMP388/BMP390L
 * Select communication port SPI, please comment out I2C port
 * Set up digital pin according to the on-board pin connected with SPI chip-select pin.
 * Notice: csPin used here is D3 digital pin on ESP32, other non-conflicting pins can also be selected as external interrupt pins.
 */
// uint8_t csPin = D3;
// DFRobot_BMP388_SPI sensor(&SPI, csPin);
// DFRobot_BMP390L_SPI sensor(&SPI, csPin);


#define CALIBRATE_ABSOLUTE_DIFFERENCE

void setup(void)
{
  Serial.begin(115200);

  int rslt;
  while( ERR_OK != (rslt = sensor.begin()) ){
    if(ERR_DATA_BUS == rslt){
      Serial.println("Data bus error!!!");
    }else if(ERR_IC_VERSION == rslt){
      Serial.println("Chip versions do not match!!!");
    }
    delay(3000);
  }
  Serial.println("Begin ok!");

  while( !sensor.setSamplingMode(sensor.eUltraPrecision) ){
    Serial.println("Set samping mode fail, retrying....");
    delay(3000);
  }

  delay(100);
  #ifdef CALIBRATE_ABSOLUTE_DIFFERENCE
  if( sensor.calibratedAbsoluteDifference(540.0) ){
    Serial.println("Absolute difference base value set successfully!");
  }
  #endif

  float sampingPeriodus = sensor.getSamplingPeriodUS();
  Serial.print("samping period : ");
  Serial.print(sampingPeriodus);
  Serial.println(" us");

  float sampingFrequencyHz = 1000000 / sampingPeriodus;
  Serial.print("samping frequency : ");
  Serial.print(sampingFrequencyHz);
  Serial.println(" Hz");

  Serial.println();
  delay(1000);
}

void loop()
{

  float temperature = sensor.readTempC();
  Serial.print("temperature : ");
  Serial.print(temperature);
  Serial.println(" C");

  float Pressure = sensor.readPressPa();
  Serial.print("Pressure : ");
  Serial.print(Pressure);
  Serial.println(" Pa");

  float altitude = sensor.readAltitudeM();
  Serial.print("Altitude : ");
  Serial.print(altitude);
  Serial.println(" m");

  Serial.println();
  delay(1000);
}

Result

Check the value on the serial monitor.