Contents
How does BMP180 measure temperature?
The BMP180 consists of a piezo-resistive sensor, an analog to digital converter and a control unit with E2PROM and a serial I2C interface. The BMP180 delivers the uncompensated value of pressure and temperature. The microcontroller sends a start sequence to start a pressure or temperature measurement.
How accurate is BMP180?
Through its high relative accuracy of ±0.12 hPa (±1m) the BMP180 has become the most reliable sensor for precise applications, like indoor-navigation. The small size of 3.6 x 3.8 mm2 and the height of only 0.93 mm makes it very suitable for the implementation in small mobile devices.
How does BMP180 sensor work?
BMP180 is a high precision sensor designed for consumer applications. Barometric Pressure is nothing but weight of air applied on everything. The air has weight and wherever there is air its pressure is felt. BMP180 sensor senses that pressure and provides that information in digital output.
Can BMP180 measure humidity?
This digital sensor can measure barometric pressure, temperature and altitude. The readings from this sensor are fairly accurate, so we will be using this sensor to only measure humidity since the BMP180 gives more accurate temperature readings.
What is measured in hPa?
The units of atmospheric pressure commonly used in meteorology were formerly the bar, which was close to the average air pressure on Earth, and the millibar. Since the introduction of SI units, meteorologists generally measure pressures in hectopascals (hPa) unit, equal to 100 pascals or 1 millibar.
Which sensor converts the pressure into altitude?
Barometric pressure sensors measure the absolute pressure of the air around them. This pressure varies with both the weather and altitude. Depending on how you interpret the data, you can monitor changes in the weather, measure altitude, or any other tasks that require an accurate pressure reading.