The BMP180 Barometric sensor module can give accurate measurement of the temperature, pressure in the air and altitude. Barometric sensors can be used to work out the weather. As from the pressure from the air and the temperature we can work out weather. because the sensor can also work out the altitude it can also be used as a altimeter.
The BMP180 has a consists of a piezo-resistive sensor, an analog to digital converter and a control unit with EEPROM and a serial I2C interface. The BMP180 delivers the uncompensated value of pressure and temperature. The EEPROM has stored 176 bit of individual calibration data. This is used to compensate offset. Temperature dependence and other parameters of the sensor.