BMP280 is a high-precision digital barometer with I2C or SPI interface. Measures temperature, atmospheric pressure and altitude with ±1.0°C accuracy. Operates between -40°C and 85°C with 0.6mA current consumption. Dimensions are 40x20mm, weight is 3g
Air pressure is the weight of air molecules above a surface. Dry air has a molecular weight of 28.97 grams per mole. Air pressure ranges from 980 to 1050 millibars across Earth
Barometer measures atmospheric pressure using liquid mercury. Pressure decreases with altitude due to fewer molecules pressing down. Sea level pressure at 59°F equals one atmosphere
BMP180 measures barometric pressure and altitude using piezoresistive technology. Sensor detects changes in altitude as small as a few inches. Outputs pressure readings in Pascals, converted to hectoPascals by library
Barometric pressure measures atmospheric pressure in Earth's atmosphere. One atmosphere equals 29.92 inches of mercury (1,013 millibars). Pressure increases with denser air molecules and decreases with spread-out ones
Born in Rome in 1608 to poor textile worker parents. Received basic education in Faenza under uncle Giacomo. Studied under Benedictine monk Benedetto Castelli in Rome. Became friends with Cavalieri and other Castelli students