Introduction: Instructions for Using the BMP180 Air Pressure Sensor With Arduino

By plus.google.com/1026985358353876

The BMP180 air pressure sensor is a compact and convenient device used to measure air pressure. With its accurate pressure and temperature measurement capabilities, the BMP180 Arduino sensor brings many significant benefits in measurement and environmental monitoring applications.

With communication through the I2C standard, the sensor is easy to integrate into embedded systems and electronic projects. By using the BMP180 pressure sensor, you can measure pressure, temperature, and calculate altitude in real-time, opening up many applications in measurement, weather monitoring, altitude control, and various other applications.

Step 1: Overview of the BMP180 Air Pressure Sensor

The BMP180 chip is a pressure and temperature sensor that can be used to measure air pressure and ambient temperature. It is manufactured by Bosch Sensortec and widely used in pressure measurement applications, such as altitude measurement, weather monitoring, environmental control, and air conditioning.

The BMP180 utilizes Piezo-resistive pressure sensor technology, where pressure is converted into a resistance value. This chip provides high accuracy and low power consumption.

Step 2: Chip BMP180

The BMP180 chip is capable of measuring air pressure ranging from 300 to 1100 hPa (hectopascals). This is equivalent to approximately 9000 meters below sea level to 500 meters above sea level. However, for optimal accuracy, the recommended range for measuring air pressure is between 700 and 900 hPa.


Step 3: Power Supply

The BMP180 atmospheric pressure sensor requires a voltage supply ranging from 1.8V to 3.6V. The standard operating voltage is 3.3V. You can use the 5V power supply of the Arduino.

The BMP180 consumes very little current, less than 1mA during measurement and only 5μA when not active. This low power consumption allows for applications in battery-powered devices.

Step 4: Wiring Diagram for Connecting the BMP180 Air Pressure Sensor to Arduino

  • Connect the VCC pin of the BMP180 to the 3.3V or 5V pin on the Arduino (depending on the voltage level you are using).
  • Connect the GND pin of the BMP180 to the GND pin on the Arduino.
  • Connect the SDA pin of the BMP180 to the SDA (data) pin on the Arduino. This is usually A4 on Arduino Uno or Mega.
  • Connect the SCL pin of the BMP180 to the SCL (clock) pin on the Arduino. This is usually A5 on Arduino Uno or Mega.

Once the connections are made, you can proceed with coding and communication with the BMP180 sensor using the I2C protocol.

Step 5: Code

#include <Wire.h>
#include <Adafruit_BMP085.h>
#define seaLevelPressure_hPa 1013.25

Adafruit_BMP085 bmp;

void setup() {
  Serial.begin(9600);
  if (!bmp.begin()) {
    Serial.println("Could not find a valid BMP085 sensor, check wiring!");
    while (1) {}
  }
}

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

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

    Serial.print("Altitude = ");
    Serial.print(bmp.readAltitude());
    Serial.println(" meters");

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

    Serial.print("Real altitude = ");
    Serial.print(bmp.readAltitude(seaLevelPressure_hPa * 100));
    Serial.println(" meters");

    Serial.println();
    delay(500);
}