: rgb(33, 33, 33); Bosch BMP180 Sensor is 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. It is completely identical to the BMP085 in terms of firmware/software. Features:- 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 +85degC operational range, +-2degC temperature accuracy This board/chip uses I2C 7-bit address 0x77.