Application Note

Bosch Sensortec

BlueBox Demo-Board for the digital sensors AN18002

SMB365 (acceleration) and SMD500 (pressure)

12.absolute altitude above sea level

•Display shows the absolute altitude above sea level in meter or feet

•the absolute altitude in meter is calculated according to the international barometric formula (see chapter 3.3)

•meter and feet can be converted as followed:

ometer = feet / 0.3048 o feet = meter * 0.3048

13.Altimeter gauge

•Display shows the calculated altitude in the meter or feet

14.digital value pressure

•Display shows digital output pressure value of the SMD500 in LSB

15.pressure at sea level

•Display shows the pressure at sea level in hPa, PSI or mm Hg

16.Barometer gauge

•Display shows the pressure at sea level in hPa, PSI and mm Hg

17.digital value temperature

•Display shows digital output temperature value of the SMD500 in LSB

18.Temperature

•Display shows the calculated temperature value in °C, °F or K

•Fahrenheit, Kelvin and Celsius can be converted as followed:

o°F = °C * 1.8 + 32 o K = °C + 273.15 o °C = (°F - 32) / 1,8

o K = °F + 459.67 / 1.8 o °C = K - 273.15

o °F = K *1.8 - 459.67

19.Thermometer gauge

•Display shows the calculated temperature value in °C and °F

Rev. 1.0

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