This precision sensor from Bosch is the best low-cost sensing solution for measuring barometric pressure and temperature. Because pressure changes with altitude you can also use it as an altimeter! The sensor is soldered onto a PCB with a 3.3V regulator, I2C level shifter and pull-up resistors on the I2C pins. The BMP180 is the next-generation of sensors from Bosch, and replaces the BMP085.
The good news is that it is completely identical to the BMP085 in terms of firmware/software/interfacing – you can use any example code/libraries for BMP085 as a drop-in replacement.
Applications
- Optimized for use in mobile phones, PDAs, GPS navigation devices and outdoor equipment.
Features
- High precision digital pressure sensors for consumer applications.
- Ultra-low power
- Low-voltage
- I2C interface
Specifications
- Pressure sensing range: 300-1100 hPa (9000m to -500m above sea level)
- Up to 0.03hPa / 0.25m resolution
- -40 to 85?C operational range, -2?C temperature accuracy
Document
Connect GY-68 to Arduino
Arduino Sketch:
#include <Wire.h>
#include <Adafruit_BMP085.h>
// Connect VCC of the BMP180 sensor to 3.3V
// Connect GND to Ground
// Connect SCL to i2c clock thats A5
// Connect SDA to i2c data thats A4
Adafruit_BMP085 bmp;
void setup()
{
Serial.begin(9600);
if (!bmp.begin())
{
Serial.println("BMP180 sensor not found");
while (1) {}
}
}
void loop() {
Serial.print("Temperature = ");
Serial.print(bmp.readTemperature());
Serial.println(" *C");
Serial.print("Altitude = ");
Serial.print(bmp.readAltitude(101500));
Serial.println(" meters");
Serial.println();
delay(1000);
}
Output
This was the reading from the serial monitor
Temperature = 22.90 *C
Altitude = 103.32 meters
