BMP280 sensor example

Supported sensor interfaces

• SPI 4-wire

Supported bords

• Jetson Nano
• Jetson Xavier NX
• Raspberry Pi4

Functions

instance(device, address)

• Returns the shared pointer to the instance's sensor. Performs sensor configuration with default settings.
• device - I2C file name to which the sensor is connected. An example for Jetson Nano and Raspberry Pi is /dev/i2c-1, and for Jetson Xavier NX it is /dev/i2c-8.
• address - BMP280 I2C address(default 0x77).

getTemperature()

• Returns the temperature in degrees °C.

getHumidity()

• Returns the humidity in percentage.

getQfePressure()

• Returns the QFE pressure in ppa.

getQnhPressure(double altitude)

• Returns the QFE pressure in ppa.
• altitude - Altitude of measuring point.

paToHg(float ppa)

• Returns the converted pressure value from pascals to millimeters of mercury.
• ppa - Pressure obtained by functions getQfePressure and getQnhPressure.

calcDewpoint(float humidity, float temperature)

• Returns the dewpoint in degrees °C
• humidity - Humidity in percentage.
• temperature - Temperature in degrees °C.

setConfig(Config config)

• Set config for sensor
• config - Config.

Config	Description	Default value
mode	SLEEP	NORMAL
	FORCED
	NORMAL
---	---	---
filter	OFF	OFF
	_2
	_4
	_8
	_16
---	---	---
oversamplingPressure	SKIPPED	STANDARD
	ULTRA_LOW_POWER
	LOW_POWER
	STANDARD
	HIGH_RES
	ULTRA_HIGH_RES
---	---	---
oversamplingTemperature	SKIPPED	STANDARD
	ULTRA_LOW_POWER
	LOW_POWER
	STANDARD
	HIGH_RES
	ULTRA_HIGH_RES
---	---	---
oversamplingHumidity	SKIPPED	STANDARD
	ULTRA_LOW_POWER
	LOW_POWER
	STANDARD
	HIGH_RES
	ULTRA_HIGH_RES
---	---	---
standby	_05ms	_500ms
	_62ms
	_125ms
	_250ms
	_500ms
	_1000ms
	_2000ms
	_4000ms
---	---	---