upm  1.7.1
Sensor/Actuator repository for libmraa (v2.0.0)
Public Member Functions

API for the Grove Temperature Sensor. More...

Detailed Description

This class is being replaced by the upm-temperature library and the Temperature class.

Basic UPM module for the Grove temperature sensor on analog. This sensor uses a thermistor to measure ambient temperature. 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::GroveTemp 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);
// Delete the temperature sensor object

Public Member Functions

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

Additional Inherited Members

- Protected Attributes inherited from Grove
std::string m_name

Constructor & Destructor Documentation

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

Grove analog temperature sensor constructor

pinAnalog pin to use
scaleScaling factor for raw analog value from the ADC, useful for mixed 3.3V/5V boards, default 1.0
r0zero power resistance, this is 100K (default) for v1.1-v1.2 and 10K for v1.0 of the sensor
bthermistor nominal B constant, this is 4275 (default) for v1.1-v1.2 and 3975 for v1.0 of the sensor
~GroveTemp ( )

GroveTemp destructor

Member Function Documentation

float raw_value ( )

Gets the raw value from the AIO pin

Raw value from the ADC
int value ( )

Gets the temperature in Celsius from the sensor

Normalized temperature in Celsius
Inheritance diagram for GroveTemp:
Inheritance graph
Collaboration diagram for GroveTemp:
Collaboration graph

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