AM2315 Class Reference

C++ API for AM2315 chip (Temperature & Humidity Sensor) More...

Detailed Description

• ID: am2315
• Name: AM2315 Temperature & Humidity Sensor
• Category: temp
• Manufacturer: adafruit
• Link: http://www.adafruit.com/products/1293
• Connection: i2c

Measurement Specialties AM2315 is a digital humidity sensor with temperature output. RH will report between 0 and 100% and temperature range is -40 to +125 degC. The sampling period of this sensor is 2 seconds. Reads occurring more often than that will return cached data.

    float humidity    = 0.0;
    float temperature = 0.0;

    sensor = new upm::AM2315(0, AM2315_I2C_ADDRESS);

    sensor->testSensor();

    while (!doWork) {
        humidity    = sensor->getHumidity();
        temperature = sensor->getTemperature();

        std::cout << "humidity value = " <<
                    humidity <<
                    ", temperature value = " <<
                    temperature << std::endl;
        usleep (500000);
    }

Public Member Functions
	AM2315 (int bus, int devAddr=AM2315_I2C_ADDRESS)
	~AM2315 ()
float	getHumidity (void)
float	getTemperature (void)
float	getTemperatureF (void)
int	testSensor (void)
int	i2cWriteReg_32 (int reg, uint32_t ival)
int	i2cWriteReg_16 (int reg, uint16_t ival)
int	i2cWriteReg_8 (int reg, uint8_t ival)
uint32_t	i2cReadReg_32 (int reg)
uint16_t	i2cReadReg_16 (int reg)
uint8_t	i2cReadReg_8 (int reg)

Constructor & Destructor Documentation

AM2315	(	int	bus,
		int	devAddr = AM2315_I2C_ADDRESS
	)

Instanciates a AM2315 object

Parameters

bus	number of used bus
devAddr	address of used i2c device
mode	AM2315 oversampling

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~AM2315

(

)

AM2315 object destructor, basicaly it close i2c connection.

Member Function Documentation

float getHumidity

(

void

)

Get the current measured humidity [RH] Data is updated every 2 seconds - accesses more often than that will return cached data

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float getTemperature

(

void

)

Get the humidity cell temperature [degC] Data is updated every 2 seconds - accesses more often than that will return cached data

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float getTemperatureF

(

void

)

Get the humidity cell temperature [degF] Data is updated every 2 seconds - accesses more often than that will return cached data

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int testSensor

(

void

)

Function intended to test the device and verify it is correctly operating.

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int i2cWriteReg_32	(	int	reg,
		uint32_t	ival
	)

Write four byte (32b) register

Note: These access routines are not the normal accesses to an i2c device. The AM2315 contains a microcontroller that manages the actual readings. These handlers then make requests over i2c using a protocol defined by the AM2315.

Parameters

reg	address of a register
ival	32b value

int i2cWriteReg_16	(	int	reg,
		uint16_t	ival
	)

Write two byte (16b) register

Parameters

reg	address of a register
ival	16b value

int i2cWriteReg_8	(	int	reg,
		uint8_t	ival
	)

Write one byte (8b) register

Parameters

reg	address of a register
ival	8b value

uint32_t i2cReadReg_32

(

int

reg

)

Read four bytes register

Parameters

reg	address of a register

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uint16_t i2cReadReg_16

(

int

reg

)

Read two bytes register

Parameters

reg	address of a register

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uint8_t i2cReadReg_8

(

int

reg

)

Read one byte register

Parameters

reg	address of a register

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

• /var/lib/jenkins/workspace/upm-doc-stable/src/am2315/am2315.h
• /var/lib/jenkins/workspace/upm-doc-stable/src/am2315/am2315.cpp