Temperature Class Reference

API for NTC Temperature Sensors. More...

Detailed Description

• ID: temperature
• Name: Analog Temperature Sensor
• Other Names: Grove Temperature Sensor
• Category: temp
• Manufacturer: seeed
• Link: http://wiki.seeed.cc/Grove-Temperature_Sensor_V1.2/
• Connection: analog
• Kit: gsk

Basic UPM module for analog temperature sensors. These sensors use a NTC thermistor to measure ambient temperature. This driver was developed using the Grove Temperature Sensor. The conversion formula has been updated to work with versions 1.1 and 1.2 of the sensor. For the older v1.0 sensor you will have to specify R0 and B values when initializing the device. The range of this sensor is -40 to 125 C and accuracy is +/- 1.5 C.

    // Create the temperature sensor object using AIO pin 0
    upm::Temperature temp(0);
    std::cout << temp.name() << std::endl;

    // Read the temperature ten times, printing both the Celsius and
    // equivalent Fahrenheit temperature, waiting one second between readings
    for (int i = 0; i < 10; i++) {
        int celsius = temp.value();
        int fahrenheit = (int) (celsius * 9.0 / 5.0 + 32.0);
        printf("%d degrees Celsius, or %d degrees Fahrenheit\n", celsius, fahrenheit);
        upm_delay(1);
    }

    // Delete the temperature sensor object

Public Member Functions
	Temperature (unsigned int pin, float scale=1.0, int r0=100000, int b=4275)
	~Temperature ()
float	raw_value ()
std::string	name ()
int	value ()

Constructor & Destructor Documentation

Temperature	(	unsigned int	pin,
		float	scale = 1.0,
		int	r0 = 100000,
		int	b = 4275
	)

Analog temperature sensor constructor

Parameters

pin	Analog pin to use
scale	Scaling factor for raw analog value from the ADC, useful for mixed 3.3V/5V boards, default 1.0
r0	zero power resistance, this is 100K (default) for v1.1-v1.2 and 10K for v1.0 of the sensor
b	thermistor nominal B constant, this is 4275 (default) for v1.1-v1.2 and 3975 for v1.0 of the sensor

~Temperature

(

)

Analog temperature sensor destructor

Member Function Documentation

float raw_value

(

)

Gets the raw value from the AIO pin

Returns

Raw value from the ADC

std::string name ( )

inline

Provided for compatibility with old grove base class

Returns

Sensor name

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int value

(

)

Gets the temperature in Celsius from the sensor

Returns

Normalized temperature in Celsius

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

• src/temperature/temperature.hpp
• src/temperature/temperature.cxx