Class that reads temperature over I2C from the MCP9808 temperature sensor. More...

#include <TempSensor.h>

Public Member Functions
	TempSensor (uint8_t scl, uint8_t sda, uint8_t add)
	Constructor for the TempSensor class. More...

float	getTempC ()
	Gets the temperature in Celsius from the sensor. More...

float	getTempF ()
	Returns the temperature in Fahrenheit. More...

uint16_t	getManuCode ()
	Returns the manufacturer code from the MCP9808. More...

Protected Attributes
uint8_t	scl_pin
	SCL pin.

uint8_t	sda_pin
	SDA Pin.

uint8_t	address
	I2C address.

const uint8_t	temp = 0x05
	Temp Value Register address.

const uint8_t	manu = 0x06
	Manufacturer Value register address.

Detailed Description

Class that reads temperature over I2C from the MCP9808 temperature sensor.

This class contains the functions to read the temperature from the different registers on the sensors. This class cannot use all the functions of the MCP9808, like temperature alerts and such, but it does have core funtionality

Constructor & Destructor Documentation

◆ TempSensor()

TempSensor::TempSensor	(	uint8_t	scl,
		uint8_t	sda,
		uint8_t	addr
	)

Constructor for the TempSensor class.

This constructor takes in the address, scl, and sda pins for connecting to the MCP9808 sensor. The address is set with the address pins, and off of the base address of the MCP 9808. This base address is 0x18, but can be changed from 0x18 to 0x1F depending on the address pins. Look at the datasheet for more info - https://cdn-shop.adafruit.com/datasheets/MCP9808.pdf

Parameters

scl	The SCL pin for I2C communication
sda	The SDA pin for I2C communication
addr	The address of the MCP9808 sensor

Member Function Documentation

◆ getManuCode()

uint16_t TempSensor::getManuCode ( )

Returns the manufacturer code from the MCP9808.

This function is used to ensure proper connection to the MCP9808 sensor. This function, if the sensor is connected correctly, should return 0x54

Returns: The manufacturer ID - should be 0x54

◆ getTempC()

float TempSensor::getTempC ( )

Gets the temperature in Celsius from the sensor.

The algorithm for getting the temperature in C is found in the datasheet. Reading from the I2C bus would not have been possible without the people here: https://forum.arduino.cc/t/how-to-read-a-register-value-using-the-wire-library/206123

Returns: The temperature in Celsius

◆ getTempF()

float TempSensor::getTempF ( )

Returns the temperature in Fahrenheit.

This function just calls TempSensor::getTempC() and then converts to Fahrenheit

Returns: The temperature in Fahrenheit

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

CanOpener/lib/sensorLib/TempSensor.h
CanOpener/lib/sensorLib/TempSensor.cpp

Public Member Functions

Protected Attributes