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 - you can use our BMP085 tutorial and any example code/libraries as a drop-in replacement. The XCLR pin is not physically present on the BMP180 so if you need to know that data is ready you will need to query the I2C bus.

This Is My Version Of The Traditional Bmp-180 Sensor, i have made this custom for my own projects you can simply edit for the purpose you need

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 - you can use our BMP085 tutorial and any example code/libraries as a drop-in replacement. The XCLR pin is not physically present on the BMP180 so if you need to know that data is ready you will need to query the I2C bus.

This board is 5V compliant - a 3.3V regulator and a i2c level shifter circuit is included so you can use this sensor safely with 5V logic and power.

Using the sensor is easy. For example, if you're using an Arduino, simply connect the VIN pin to the 5V voltage pin, GND to ground, SCL to I2C Clock (Analog 5) and SDA to I2C Data (Analog 4). Then download our BMP085/BMP180 Arduino library and example code for temperature, pressure and altitude calculation. Install the library, and load the example sketch. Immediately you'll have precision temperature, pressure and altitude data. Our detailed tutorial has all the info you need including links to software and installation instructions. It includes more information about the BMP180 so you can understand the sensor in depth including how to properly calculate altitude based on sea-level barometric pressure.

Vin: 3 to 5VDC

Logic: 3 to 5V compliant

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

This board/chip uses I2C 7-bit address 0x77.

When you're done soldering, connect the +, -, CL, and DA pins to your Arduino. Different Arduino models use different pins for the I2C interface; use the following chart to determine where to plug everything in.

IMPORTANT: Connect the power pins (+ and -) ONLY to a 3.3V supply. Larger voltages will permanently damage the part. Note that because I2C uses open drain drivers, it is safe to connect the I2C pins (DA and CL) to an I2C port on a 5V microprocessor.

Libraries are collections of software functions geared towards a single purpose, such as communicating with a specific device. We've written an Arduino library called SFE_BMP180 that allows you to easily talk to the BMP180 sensor. This library is not included with the stock Arduino software, but don't worry, installing new libraries is easy.

If you'd like to interface the BMP180 to a microcontroller other than an Arduino, the C++ source code in the library and the information in the datasheet may be helpful when writing your own code.

1. Install the Arduino IDE

If you don't already have the Arduino IDE (Integrated Development Environment) installed, download the version for your system (Windows, Mac, Linux) from http://arduino.cc/en/Main/Software and install it following the instructions on that site.

If you need help installing the IDE, check out our tutorial.

2. Install the SFE_BMP180 Library

Arduino versions 1.6 and higher have tools to help you install libraries.

Measuring Weather and Altitude

The BMP180 was designed to accurately measure atmospheric pressure. Atmospheric pressure varies with both weather and altitude; you can measure both of these using this sensor.Measuring the absolute pressure of the environment using a digital barometer such as this has some interesting applications. By converting the pressure measured into altitude, you have a reliable sensor for determining the height of your robot, plane or projectile. Using a sensor as capable as the BMP180 one can achieve accuracy of 1m, with noise of only 17cm in ultra high resolution noise. The device will operate at only 0.3uA meaning low current draw for battery powered applications.