Light Class Reference

API for the Light Sensor. More...

Detailed Description

• ID: light
• Name: Light Sensor
• Category: light
• Manufacturer: seeed
• Connection: analog
• Kit: gsk

The light sensor detects the intensity of the ambient light. As the light intensity of the environment increases, the resistance of the sensor decreases. This means the raw value from the analog pin is larger in bright light and smaller in the dark. An approximate lux value can also be returned.

    // Create the light sensor object using AIO pin 0
    upm::Light* light = new upm::Light(0);

    // Read the input and print both the raw value and a rough lux value,
    // waiting one second between readings
    while( 1 ) {
        std::cout << light->name() << " raw value is " << light->raw_value() <<
            ", which is roughly " << light->value() << " lux" << std::endl;
        sleep(1);
    }

    // Delete the light sensor object
    delete light;

Public Member Functions
	Light (unsigned int pin)
	~Light ()
float	raw_value ()
int	value ()
std::string	name ()

Constructor & Destructor Documentation

Light

(

unsigned int

pin

)

analog light sensor constructor

Parameters

pin	Analog pin to use

~Light

(

)

Light destructor

Member Function Documentation

float raw_value

(

)

Gets the raw value from the AIO pin

Returns

Raw value from the ADC

int value

(

)

Gets an approximate light value, in lux, from the sensor

Returns

Normalized light reading in lux

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

• /iotdk/jenkins/workspace/upm-doc-stable/src/light/light.hpp
• /iotdk/jenkins/workspace/upm-doc-stable/src/light/light.cxx