TempSensor_NXP_Arduino

Temperature sensor device operation sample code for Arduino

Note This library works with I2C_device library together. Please be sure the I2C_device library is imported in your environment before trying to build.

P3T1085UK-ARD and PCT2075DP-ARD : Arduino® Shield Evaluation Board for temperature sensors

What is this?

An Arduino library for I²C temperature sensors with sample code.
The I²C temperature sensors can measure temperature and output comparator or interrupt signals by threshold settings.

With TempSensor_NXP_Arduino library, the temperature measurement and showing it in Celsius can be done very simple as follwoing.
Include device name header file (LM75B.h, PCT2075.h, and/or P3T1085.h) to use those class libraries.

#include <PCT2075.h>

PCT2075 sensor;

void setup() {
  Serial.begin(9600);
  while (!Serial)
    ;

  Wire.begin();

  Serial.println("\r***** Hello, PCT2075! *****");
}

void loop() {
  float t = sensor.temp();

  Serial.println(t);
  delay(1000);
}

Supported devices

Type#	Header file	Features	Accuracy	Resolution	Interface	Evaluation board
LM75B	LM75B.h	An industrial standard Digital Temperature Sensor	±2℃	0.125℃ (11bit)	I²C Fast-mode (400KHz)	---
P3T1035	P3T1035.h	I3C/I2C-Bus ±0.5 °C Accurate Digital Temperature Sensor	±0.5℃	0.0625℃ (12bit)	I3C / I²C Fast-mode (400KHz)	P3T1035xUK Arduino® Shield Evaluation Board
P3T1084	P3T1085.h Use P3T1085 class library	I3C/I²C-Bus ±0.4 °C Accurate Digital Temperature Sensor	±0.4℃	0.0625℃ (12bit)	I3C / I²C Fast-mode (400KHz)
P3T1085	P3T1085.h	I3C/I²C-Bus ±0.5 °C Accurate Digital Temperature Sensor	±0.5℃	0.0625℃ (12bit)	I3C / I²C Fast-mode (400KHz)	P3T1085UK Arduino® Shield Evaluation Board
P3T1755	P3T1755.h	I3C/I2C-Bus ±0.5 °C Accurate Digital Temperature Sensor	±0.5℃	0.0625℃ (12bit)	I3C / I²C Fast-mode (400KHz)	P3T1755DP Arduino® Shield Evaluation Board
P3T2030	P3T2030.h	I3C/I2C-Bus ±2.0 °C Accurate Digital Temperature Sensor	±2.0℃	0.0625℃ (12bit)	I3C / I²C Fast-mode (400KHz)	P3T2030xUK Arduino® Shield Evaluation Board
PCT2075	PCT2075.h	I²C-Bus Fm+, 1 Degree C Accuracy, Digital Temperature Sensor	±1℃	0.125℃ (11bit)	I²C Fast-mode Plus (1MHz)	PCT2075DP-ARD Arduino® Shield - Temperature Sensors

Getting started

Install and run

Use Library manager in Arduino IDE for easy install

• Find this library: Open the Library Manager pane, Search this library and click INSTALL button.
  

• Click "INSTALL ALL"
  

• Install will be completed quickly
  

• Choose a sample code and try!
  

What's inside?

Temperature sensor library

LM75B, PCT2075 and P3T1085 class libraries are included. Those libraries can be used by just making an instance from those class.

Making a device instance

The temperature sensor device can be operated with this very simple code. In this code, celcius vale which is read from PCT2075 is stored in variable t

#include <PCT2075.h>

PCT2075 sensor;

void setup() {
  Wire.begin();
}

void loop() {
  float t = sensor.temp();
}

To make an instance of the device, it can be declared like..

#include <PCT2075.h>
PCT2075 sensor;

Every temperature sensor device instances has 0x48 default I²C address. If you need to change the address, it should be done at declaration of the instance.

#include <PCT2075.h>
PCT2075 sensor( 0x49 );  // I²C target address is 0x49

On addition to that, if the device is connected on different I²C bus, it needs to use different TwoWire instance.
It uses Wire instance in default condition. If it should be changed, it can be like..

#include <PCT2075.h>
PCT2075 sensor( Wire1, 0x49 );  // Choosing Wire1 and I²C target address is 0x49

void setup() {
  Wire1.begin();  // Needs to call "begin()" in Wire1
  ..

Methods

Those libraries have common methods to get/set device information.

Method	Role
temp()	Get temperature in Celsius
read()	Get temperature in Celsius (same as temp())
thresholds( v0, v1 )	Set high and low temperature threshold for OS output. v0 and v1 are needed to be given by Celsius value. Order of the arguments doesn't care
os_mode( mode )	Set OS pin mode. It can be set comparator or interrupt mode. The argument needs to be given as a class constant like PCT2075::COMPARATOR or PCT2075::INTERRUPT. The class name can be LM75B, PCT2075, P3T1085 or a generic name of TempSensor.

Examples

Example code is provided as scketch files.
For a quick access to those sketch, refer to last step of "Getting started" section of this document.

Sketch	Feature
LM75B_simple	Simple sample for just reading temperature fro LM75B in every second
P3T1035_simple	Simple sample for just reading temperature fro P3T1035 in every second (Similar to PCT2075_simple)
P3T1085_simple	Simple sample for just reading temperature fro P3T1085 in every second (Similar to PCT2075_simple)
P3T1085_interrupt	Demo for interrupt behavior. On the P3T1085UK-ARD evaluation board, the D8 pin is used for interrupt output but it cannot be used on most of Arduino boards. The D2 pin is used for interrupt input on this sketch. So to perform the interrupt correctly, short D8 and D2 pins.
P3T1085_simple_on_Arduino_Due	Same as "P3T1085_simple" code but it can run on Arduino Due. This code is to show how the different TwoWire instance can be targeted
P3T1755_simple	Simple sample for just reading temperature fro P3T1085 in every second (Similar to PCT2075_simple)
P3T1755_interrupt	Demo for interrupt behavior. On the P3T1755DP-ARD evaluation board, the D9 pin is used for interrupt output but it cannot be used on most of Arduino boards. The D2 pin is used for interrupt input on this sketch. So to perform the interrupt correctly, short D9 and D2 pins.
P3T2030_simple	Simple sample for just reading temperature fro P3T2030 in every second (Similar to PCT2075_simple)
PCT2075_simple	Simple sample for just reading temperature fro PCT2075 in every second
PCT2075DP-ARD_interrupt_by_Tos_Thyst	Demo to use interrupt. The sketch sets thresholds +2℃ and +1℃ of temperature when starting. The sketch controls on-board heater to keep the temperature withon those thresholds.

Document

For details of the library, please find descriptions in this document.

References

I²C Digital Temperature Sensors

Related libraries

Library	Feature	Target devices	Required library
GPIO_NXP_Arduino	GPIO libraries	PCAL6408A, PCAL6416A, PCAL6524, PCAL6534, PCA9555, PCA9554	I2C_device_Arduino
LCDDriver_NXP_Arduino	LCD driver libraries	PCA8561	I2C_device_Arduino
LEDDriver_NXP_Arduino	LED driver libraries	PCA9955B, PCA9956B, PCA9957	I2C_device_Arduino
MUX_SW_NXP_Arduino	I²C mux/switch libraries	PCA9846	I2C_device_Arduino
RTC_NXP_Arduino	RTC libraries	PCF2131, PCF85063A	I2C_device_Arduino
TempSensor_NXP_Arduino	Temperature sensor libraries	LM75B, PCT2075, P3T1085	I2C_device_Arduino
I2C_device_Arduino	Base library for I²C operations	none (can be applied as base class for all I²C targets)	---