Seed Studio BMP180 User manual
2
Document Revision History
Revision
Date
Author
Description
1.0
Sep 21, 2015
Victor.He
Create file
3
Contents
Document Revision History···································································································2
1. Introduction ···················································································································2
2. Features··························································································································3
3. Application Ideas············································································································4
4. Specifications ·················································································································5
5. Usage······························································································································6
5.1 With Arduino····················································································································· 6
5.2 With Raspberry Pi ············································································································· 8
6. Resources ·····················································································································11
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Disclaimer
For physical injuries and possessions loss caused by those reasons which are not related to product quality,
such as operating without following manual guide, natural disasters or force majeure, we take no
responsibility for that.
Under the supervision of Seeed Technology Inc., this manual has been compiled and published which
covered the latest product description and specification. The content of this manual is subject to change
without notice.
Copyright
The design of this product (including software) and its accessories is under tutelage of laws. Any action to
violate relevant right of our product will be penalized through law. Please consciously observe relevant local
laws in the use of this product.
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1. Introduction
This is a Grove module for the Bosch BMP180 high-precision, low-power digital barometer. The BMP180
offers a pressure measuring range of 300 to 1100 hPa with an accuracy down to 0.02 hPa in advanced
resolution mode. It’s based on piezo-resistive technology for high accuracy, ruggedness and long term
stability. The chip only accepts 1.8V to 3.6V input voltage. However, with outer circuit added, this module
becomes compatible with 3.3V and 5V. Therefore, it can be used on Arduino/Seeeduino or Seeeduino
Stalker without modification. It is designed to be connected directly to a micro-controller via the I2C bus.
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2. Features
Digital two wire (I2C) interface
Wide barometric pressure range
Flexible supply voltage range
Ultra-low power consumption
Low noise measurement
Factory-calibrated
-40 to +85°C operational range, ±2°C temperature accuracy
I2C address: 0x77
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3. Application Ideas
Enhancement of GPS navigation
Indoor and outdoor navigation
Leisure and sports
Weather forecast
Vertical velocity indication (rise/sink speed)
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4. Specifications
Item
Min
Typical
Max
Unit
Voltage
3
5
5.5
VDC
Current
1.1
/
20
uA
Pressure Range
300
/
1100
hPa
Faster I2C data transfer
/
/
3.4
MHZ
Dimension
40.1*20.2*9.7
mm
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5. Usage
5.1 With Arduino
Barometric condition is one of the criteria used to predict coming change in weather and deduce altitude
above sea level. Here is a demo to show you how to read the barometric data from this Grove -
Barometer Sensor (BMP180).
1. Connect it to IIC port of Seeeduino or Grove - Base Shield via a Grove cable. And connect Arduino to
PC via a USB cable.
2. Download the library(the barometer library is shared by Grove - Barometer Sensor (BMP180) and
Grove - Barometer Sensor(BMP085));Unzip it into the libraries file of Arduino IDE by the
path: ..\arduino-1.0.1\libraries.
3. Create a new Arduino sketch and paste the codes below to it or open the code directly by the path:
File -> Example ->Barometer_Sensor->Barometer_Sensor.
/* Barometer demo V1.0
* Based largely on code by Jim Lindblom
* Get pressure, altitude, and temperature from the BMP085.
* Serial.print it out at 9600 baud to serial monitor.
*
* By:http://www.seeedstudio.com
*/
#include "Barometer.h"
#include <Wire.h>
float temperature;
float pressure;
float atm;
float altitude;
Barometer myBarometer;
void setup(){
Serial.begin(9600);
myBarometer.init();
}
void loop()
{
temperature =myBarometer.bmp085GetTemperature(myBarometer.bmp085ReadUT()); //Get the
temperature, bmp085ReadUT MUST be called first
pressure =myBarometer.bmp085GetPressure(myBarometer.bmp085ReadUP());//Get the temperature
altitude =myBarometer.calcAltitude(pressure); //Uncompensated calculation - in Meters
atm =pressure /101325;
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Serial.print("Temperature: ");
Serial.print(temperature,2); //display 2 decimal places
Serial.println("deg C");
Serial.print("Pressure: ");
Serial.print(pressure,0); //whole number only.
Serial.println(" Pa");
Serial.print("Ralated Atmosphere: ");
Serial.println(atm,4); //display 4 decimal places
Serial.print("Altitude: ");
Serial.print(altitude, 2); //display 2 decimal places
Serial.println(" m");
Serial.println();
delay(1000); //wait a second and get values again.
}
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