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          Barometric Pressure Unit is a barometer unit, which integrates the Bosch BMP280 pressure sensor to measure atmospheric pressure and estimate the altitude. The relative accuracy can reach ± 0.12hpa, equivalent to ± 1m height difference. At the same time, the temperature drift coefficient is very low, which can reach 1.5 PA / K, that is, the temperature drift is 12.6 cm / K. in addition, there is an integrated temperature sensor in the chip.
| Resources | Parameter | 
|---|---|
| Air pressure measurement range | 300 - 1100 hPa(+9000m ~ -500m) | 
| Relative accuracy | 0.12hPa | 
| Absolute accuracy | 1hPa | 
| Temperature measurement range | -40 ~ +85°C | 
| Temperature resolution | 0.01°C | 
| Pressure resolution | 0.16Pa | 
| Temperature coefficient offset | 1.5 Pa/K(12.6 cm/K) | 
| Current consumption | 2.7μA @ 1 Hz sampling rate | 
| Voltage | 1.71V - 3.6V | 
| Communication protocol | I2C:0x76 | 
| Net Weight | 8g | 
| Gross Weight | 21g | 
| Produce Size | 24*24*13mm | 
| Package Size | 35*36*18mm | 
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