BME

Public Functions

	Name
	BME()
bool	begin(uint8t ADR =0x77) Initialize the BME280.
float	getPressure() Atmospheric pressure.
float	getHumidity() Relative humidity.
float	getTemperature() Air temperature.
size_t	printDataHeader(Print & out) Print the Northern Widget columns into any Print: a File to reach the card, Serial to reach the monitor.
size_t	printDataRow(Print & out) Print pressure, humidity and temperature in printDataHeader()’s order, each followed by a comma. Takes no reading.
void	beginRawReadings() Prepare for raw reading collection.
uint16_t	takeRawReading(char * buf, uint16_t offset) Take one raw reading and write CSV data into buf at offset. Writes: pressure [mBar], humidity [%], temperature [°C], each followed by a comma. Max bytes written per call: 24.
void	endRawReadings() End raw reading collection.

Public Functions Documentation

function BME

BME()

function begin

bool begin(
    uint8_t ADR_ =0x77
)

Initialize the BME280.

Parameters:

• ADR_ I2C address (default 0x77).

Return: true if sensor found and initialized successfully.

function getPressure

float getPressure()

Atmospheric pressure.

Return: Pressure in mBar.

function getHumidity

float getHumidity()

Relative humidity.

Return: Humidity in %.

function getTemperature

float getTemperature()

Air temperature.

Return: Temperature in °C.

function printDataHeader

size_t printDataHeader(
    Print & out
)

Print the Northern Widget columns into any Print: a File to reach the card, Serial to reach the monitor.

Return: Bytes printed: “Pressure Atmos [mBar],Humidity [%],Temp Atmos [C],”

function printDataRow

size_t printDataRow(
    Print & out
)

Print pressure, humidity and temperature in printDataHeader()’s order, each followed by a comma. Takes no reading.

function beginRawReadings

void beginRawReadings()

Prepare for raw reading collection.

function takeRawReading

uint16_t takeRawReading(
    char * buf,
    uint16_t offset
)

Take one raw reading and write CSV data into buf at offset. Writes: pressure [mBar], humidity [%], temperature [°C], each followed by a comma. Max bytes written per call: 24.

Parameters:

• buf Caller-managed destination buffer.
• offset Starting write position in buf.

Return: New offset after writing.

function endRawReadings

void endRawReadings()

End raw reading collection.

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Updated on 2026-10-04 at 04:51:46 +0000