Adafruit_Si7021 Class Reference

Class that stores state and functions for interacting with Si7021 Sensor. More...

#include <Adafruit_Si7021.h>

Public Member Functions
	Adafruit_Si7021 (TwoWire *theWire=&Wire)
	Instantiates a new Adafruit_Si7021 class. More...
bool	begin ()
	Sets up the HW by reseting It, reading serial number and reading revision. More...
float	readTemperature ()
	Reads the temperature value from Si7021 (No Master hold) More...
void	reset ()
	Sends the reset command to Si7021.
void	readSerialNumber ()
	Reads serial number and stores It in sernum_a and sernum_b variable.
float	readHumidity ()
	Reads the humidity value from Si7021 (No Master hold) More...
void	heater (bool h)
	Enable/Disable the sensor heater. More...
bool	isHeaterEnabled ()
	Return sensor heater state. More...
void	setHeatLevel (uint8_t level)
	Set the sensor heater heat level. More...
uint8_t	getRevision ()
	Returns sensor revision established during init. More...
si_sensorType	getModel ()
	Returns sensor model established during init. More...

Public Attributes
uint32_t	sernum_a
uint32_t	sernum_b

Detailed Description

Class that stores state and functions for interacting with Si7021 Sensor.

Constructor & Destructor Documentation

Adafruit_Si7021()

Adafruit_Si7021::Adafruit_Si7021

(

TwoWire *

theWire = &Wire

)

Instantiates a new Adafruit_Si7021 class.

Parameters

*theWire

optional wire object

Member Function Documentation

begin()

bool Adafruit_Si7021::begin

(

)

Sets up the HW by reseting It, reading serial number and reading revision.

Returns

Returns true if set up is successful.

readTemperature()

float Adafruit_Si7021::readTemperature

(

)

Reads the temperature value from Si7021 (No Master hold)

Returns

Returns temperature as float value or NAN when there is error timeout

readHumidity()

float Adafruit_Si7021::readHumidity

(

)

Reads the humidity value from Si7021 (No Master hold)

Returns

Returns humidity as float value or NAN when there is error timeout

heater()

void Adafruit_Si7021::heater

(

bool

h

)

Enable/Disable the sensor heater.

Enable/Disable sensor heater.

Parameters

h	True to enable the heater, False to disable it.

isHeaterEnabled()

bool Adafruit_Si7021::isHeaterEnabled

(

)

Return sensor heater state.

Returns

heater state (TRUE = enabled, FALSE = disabled)

setHeatLevel()

void Adafruit_Si7021::setHeatLevel

(

uint8_t

level

)

Set the sensor heater heat level.

Parameters

level

is a si_heatLevel that represents the heat level

getRevision()

uint8_t Adafruit_Si7021::getRevision ( )

inline

Returns sensor revision established during init.

Returns

model value

getModel()

si_sensorType Adafruit_Si7021::getModel

(

)

Returns sensor model established during init.

Returns

model value

Member Data Documentation

sernum_a

uint32_t Adafruit_Si7021::sernum_a

Serialnum A

sernum_b

uint32_t Adafruit_Si7021::sernum_b

Serialnum B

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The documentation for this class was generated from the following files:

• Adafruit_Si7021.h
• Adafruit_Si7021.cpp