Introduction: BMP280 Interfacing With STM32F401CCU(Black Pill) Arduino IDE

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Hello, in this tutorial I use the BMP280 to measure temperature, pressure, and also altitude, with the help of an STM32F401CCU board and Serial Monitor.

Supplies

1.STM32F401CCU6

2.BMP280

3.Jumper Wire

Step 1: Connect the Wires As Shown in the Diagram

NOTE: I've used Black Pill in my case but used a Blue Pill to show the wiring diagram because there was no Black Pill available in fritzing.Wiring will be the same for both boards.

Step 2: Install Adafruit BMP280 Library, Write the Code.

#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
  Serial.begin(9600);
  Wire.setSDA(PB9);
  Wire.setSCL(PB8);
  Wire.begin();
  Serial.println(F("BMP280 test"));

  if (!bmp.begin()) {
    Serial.println(F("Could not find a valid BMP280 sensor, check wiring or "
                      "try a different address!"));
    while (1) delay(10);
  }

  /* Default settings from datasheet. */
  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,     /* Operating Mode. */
                  Adafruit_BMP280::SAMPLING_X2,     /* Temp. oversampling */
                  Adafruit_BMP280::SAMPLING_X16,    /* Pressure oversampling */
                  Adafruit_BMP280::FILTER_X16,      /* Filtering. */
                  Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
}

void loop() {
    Serial.print(F("Temperature = "));
    Serial.print(bmp.readTemperature());
    Serial.println(" *C");

    Serial.print(F("Pressure = "));
    Serial.print(bmp.readPressure());
    Serial.println(" Pa");

    Serial.print(F("Approx altitude = "));
    Serial.print(bmp.readAltitude(1013.25)); /* Adjusted to local forecast! */
    Serial.println(" m");

    Serial.println();
    delay(2000);
}

Attachments

Step 3: Before Uploading the Code.

Go to your library c++ file, library is usually installed in the “Documents/Arduino/Libraries”, open Adafruit_BMP280.cpp file using Notepad++, Then go to the line “41” and _i2caddr change the “addr” with the address of your BMP280 Device(Usually 0x76):

Step 4: Connect STM32 With PC and Upload the Code.

Follow this link to know how to upload the code to STM32 from Arduino IDE using USB:

https://www.sgbotic.com/index.php?dispatch=pages.view&page_id=49

Step 5: Output