Beginner
10 min

Revolutionize temperature monitoring with TMP007 and PIC18F2550

Touch-free temperature tracking

IrThermo 2 Click with EasyPIC v7

Published Nov 01, 2023

Click board™

IrThermo 2 Click

Dev Board

EasyPIC v7

Compiler

NECTO Studio

MCU

PIC18F2550

Experience the power of contactless temperature monitoring for swift, accurate, and reliable results!

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Hardware Overview

How does it work?

IrThermo 2 Click is based on the TMP007, an infrared thermopile sensor with an integrated Math Engine from Texas Instruments. When there is infrared radiation, and the sensor absorbs it, the integrated Math Engine calculates its temperature by comparing it with the temperature of the silicon die. The sensor is factory calibrated, but the user can adjust the calibration coefficients for specific applications. This adjustment could be the correction for the range, field of view, object shape, and environmental factors. Besides the direct

reading of the object temperature, Math Engine features programmable alerts, nonvolatile memory (EEPROM) for storing calibration coefficients, and transient correction. The IrThermo 2 Click uses an industry-standard I2C interface to communicate with the host MCU over the mikroBUS™ socket. One of eight programmable I2C addresses can be set over the ADR1 and ADR0 solder jumpers labeled ADDR SEL and positions 1 and 0. Those jumpers are set to 0 (GND) by default. It also features an active LOW

alert output on pin AL that can be used as an alert function if the TMP007 is working in an interrupt mode. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via an onboard jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.

IrThermo 2 Click hardware overview image

Features overview

Development board

EasyPIC v7 is the seventh generation of PIC development boards specially designed to develop embedded applications rapidly. It supports a wide range of 8-bit PIC microcontrollers from Microchip and has a broad set of unique functions, such as a powerful onboard mikroProg programmer and In-Circuit debugger over USB-B. The development board is well organized and designed so that the end-user has all the necessary elements in one place, such as switches, buttons, indicators, connectors, and others. With four different connectors for each port, EasyPIC v7 allows you to connect accessory boards, sensors, and custom electronics more efficiently than ever. Each part of

the EasyPIC v7 development board contains the components necessary for the most efficient operation of the same board. An integrated mikroProg, a fast USB 2.0 programmer with mikroICD hardware In-Circuit Debugger, offers many valuable programming/debugging options and seamless integration with the Mikroe software environment. Besides it also includes a clean and regulated power supply block for the development board. It can use various external power sources, including an external 12V power supply, 7-23V AC or 9-32V DC via DC connector/screw terminals, and a power source via the USB Type-B (USB-B) connector. Communication options such as

USB-UART and RS-232 are also included, alongside the well-established mikroBUS™ standard, three display options (7-segment, graphical, and character-based LCD), and several different DIP sockets. These sockets cover a wide range of 8-bit PIC MCUs, from PIC10F, PIC12F, PIC16F, PIC16Enh, PIC18F, PIC18FJ, and PIC18FK families. EasyPIC v7 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

EasyPIC v7 horizontal image

Microcontroller Overview

MCU Card / MCU

default

Architecture

PIC

MCU Memory (KB)

32

Silicon Vendor

Microchip

Pin count

28

RAM (Bytes)

2048

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
NC
NC
RST
NC
NC
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
Alert Interrupt
RB1
INT
NC
NC
TX
NC
NC
RX
I2C Clock
RC3
SCL
I2C Data
RC4
SDA
Power Supply
5V
5V
Ground
GND
GND
2

Take a closer look

Click board™ Schematic

IrThermo 2 Click Schematic  schematic

Step by step

Project assembly

EasyPIC v7 front image hardware assembly

Start by selecting your development board and Click board™. Begin with the EasyPIC v7 as your development board.

EasyPIC v7 front image hardware assembly
Rotary B 2 Click front image hardware assembly
MCU DIP 28 hardware assembly
EasyPIC v7 MB 2 - upright/background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
NECTO Compiler Selection Step Image hardware assembly
NECTO Output Selection Step Image hardware assembly
Necto image step 6 hardware assembly
Necto DIP image step 7 hardware assembly
EasyPIC PRO v7a Display Selection Necto Step hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto PreFlash Image hardware assembly

Track your results in real time

Application Output

This Click board can be interfaced and monitored in two ways:

  • Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.

Software Support

Library Description

This library contains API for IrThermo 2 Click driver.

Key functions:

  • irthermo2_get_raw_temperature - Function read 16-bit data from raw temperature register and calculate temperature in degrees Celsius

  • irthermo2_get_object_temperature_c - Function read 16-bit data from object temperature register and calculate temperature in degrees Celsius

  • irthermo2_get_object_temperature_f - Function read 16-bit data from object temperature register and calculate temperature in degrees Fahrenheit

Open Source

Code example

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

/*!
 * @file main.c
 * @brief IrThermo2 Click example
 * 
 * # Description
 * IrThermo 2 is a non-contact temperature measurement click. The sensor absorbs the infrared 
 * radiation emitted by the target object (withing the sensor’s field of view) and 
 * the integrated math engine calculates its temperature by comparing it with the temperature 
 * of the silicon die. The measurement range of the sensor is between –40°C to 125°C.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initialization driver enable's - I2C, set default configuration and start write log.
 * 
 * ## Application Task  
 * This is a example which demonstrates the use of IrThermo 2 Click board.
 * Measures the object temperature value from sensor and calculate temperature in degrees Celsius [ C ].
 * Results are being sent to the USART Terminal where you can track their changes.
 * All data logs on usb uart for aproximetly every 5 sec when the data value changes.
 * 
 *
 * @author MikroE Team
 *
 */

#include "board.h"
#include "log.h"
#include "irthermo2.h"


static irthermo2_t irthermo2;
static log_t logger;

static float temperature;


void application_init ( void )
{
    log_cfg_t log_cfg;
    irthermo2_cfg_t cfg;

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, "---- Application Init ----" );

    //  Click initialization.

    irthermo2_cfg_setup( &cfg );
    IRTHERMO2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    irthermo2_init( &irthermo2, &cfg );

    irthermo2_default_cfg( &irthermo2 );
    Delay_ms( 100 );
    log_info( &logger, "---- Application Task ----" );
}

void application_task ( void )
{
    temperature = irthermo2_get_object_temperature_c( &irthermo2 );

    log_printf( &logger, " Temperature : %.2f C\r\n", temperature );
    log_printf( &logger, "---------------------------\r\n" );

    Delay_ms( 1000 );
}

void main ( void )
{
    application_init( );

    for ( ; ; )
    {
        application_task( );
    }
}

// ------------------------------------------------------------------------ END

Additional Support

Resources

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