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.
String	getHeader() Northern Widget CSV header string.
String	getString() Northern Widget CSV data string.
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.
float	GetPressure()
float	GetHumidity()
float	GetTemperature()
String	GetHeader()
String	GetString()

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 getHeader

String getHeader()

Northern Widget CSV header string.

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

function getString

String getString()

Northern Widget CSV data string.

Return: Comma-separated pressure, humidity, temperature with trailing comma.

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.

function GetPressure

float GetPressure()

function GetHumidity

float GetHumidity()

function GetTemperature

float GetTemperature()

function GetHeader

String GetHeader()

function GetString

String GetString()

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Updated on 2026-05-15 at 05:04:17 +0000