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BMP180

Overview

In this tutorial, we delve into the GY-87 IMU module, focusing on the BMP180 sensor for measuring temperature, pressure, and altitude. Ideal for applications like weather monitoring and altitude tracking, this lesson covers interfacing the GY-87 with an Arduino Uno and using the Adafruit BMP085 library. You’ll learn how to initialize the BMP180 sensor and read its data on the Arduino Serial Monitor, a crucial skill for projects that require environmental data.

Required Components

In this project, we need the following components.

It’s definitely convenient to buy a whole kit, here’s the link:

Name	ITEMS IN THIS KIT	LINK
Elite Explorer Kit	300+	Elite Explorer Kit

You can also buy them separately from the links below.

COMPONENT INTRODUCTION	PURCHASE LINK
Arduino Uno R4 WiFi	-
Jumper Wires	BUY
GY-87 IMU module	-

Wiring

Schematic Diagram

Code

Note

You can open the file 09-gy87_bmp180.ino under the path of elite-explorer-kit-main\basic_project\09-gy87_bmp180 directly.
Or copy this code into Arduino IDE.

Note

To install the library, use the Arduino Library Manager and search for “Adafruit BMP085 Library” and install it.

Code Analysis

initializeBMP180()

Initialize the BMP180 sensor.

void initializeBMP180() {
  // Start BMP180 initialization
  if (!bmp.begin()) {
    Serial.println("Could not find a valid BMP180 sensor, check wiring!");
    while (1)
      ;  // Halt if sensor not found
  }
  Serial.println("BMP180 Found!");
}

printBMP180()

Print the values read by the BMP180 sensor.

void printBMP180() {
  Serial.println();
  Serial.println("BMP180 ------------");
  Serial.print("Temperature = ");
  Serial.print(bmp.readTemperature());
  Serial.println(" *C");

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

  // Calculate altitude assuming 'standard' barometric
  // pressure of 1013.25 millibar = 101325 Pascal
  Serial.print("Altitude = ");
  Serial.print(bmp.readAltitude());
  Serial.println(" meters");

  Serial.print("Pressure at sealevel (calculated) = ");
  Serial.print(bmp.readSealevelPressure());
  Serial.println(" Pa");
  Serial.println("BMP180 ------------");
  Serial.println();
}