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Measure And Display The Ambient Temperature With Pmod Tc1

Made by Digilent Inc / Sensors

About the project

This project will show how to measure and display the ambient temperature using Pmod TC1 with Arduino Uno

Project info

Difficulty: Easy

Platforms: Arduino, Digilent

Estimated time: 1 hour

License: GNU General Public License, version 3 or later (GPL3+)

Items used in this project

Hardware components

	Pmod TC1	x 1
	Arduino Uno - R3	x 1

Software apps and online services

Arduino IDE

Story

In this project, Pmod TC1 is used to measure the temperature of the air and display it on the Serial monitor. To control the Pmod, an Arduino UNO is used, which also sends the data to the computer.

The Digilent Pmod TC1 is a cold-junction thermocouple-to-digital converter module designed for a classic K-Type thermocouple wire. With Maxim Integrated MAX31855, this module reports the measured temperature in 14-bits with 0.25°C resolution.

To communicate with the peripheral device, SPI communication protocol is used, which is made simpler by the usage of the Adaruit_MAX31855 Arduino Library. Data is displayed one measurement in a line, temperature in °C.

As the Pmod is not 5V tolerant, Pmod LVLSHFT is used to convert the voltage level of the signals. The direction switches should be switched towards the Pmod in the case of signals SCK and CS, and towards the Arduino in the case of the MISO signal.

Schematics, diagrams and documents

Pmod TC1, Pmod LVLSHFT and Arduino Uno Fritzing Image

Code

Pmod TC1 and Arduino Uno Code

/************************************************************************

  Test of Pmod TC1

*************************************************************************

  Description: Pmod_TC1
  The ambient temperature (in and ° C) is displayed in the serial monitor.


  Material
  1. Arduino Uno
  2. Pmod TC1 (download library
  https://github.com/adafruit/Adafruit-MAX31855-library)
  

  Wiring
  Module <----------> Arduino
  VCC     to          3V3
  GND     to          GND
  SCK     to          13
  MISO    to          12
  CS      to          10
  
  a logic level converter must be used!!!

************************************************************************/

#define CS 10 //chip select pin

// Call of libraries
#include <SPI.h>
#include <Adafruit_MAX31855.h>

Adafruit_MAX31855 thermocouple(CS); // Creation of the object

void setup()
{
  Serial.begin(9600); // initialization of serial communication
  thermocouple.begin();  //initialize senzor
}

void loop()
{
  Serial.print("temperature = ");
  Serial.print(thermocouple.readCelsius()); // Acquisition of temperature in degrees  Celsius
  Serial.println("°C");
  delay(1000); //wait one second
}

Credits

Digilent Inc

Digilent Inc., a National Instruments company, is a leader in the design, manufacture and worldwide distribution of FPGA development boards and Test and Measurement devices for both industry and education. Since our founding in 2000, Digilent has partnered with different leading semiconductor companies including Xilinx, Microchip, Analog Devices, ISSI and Texas Instruments to bring products with the latest embedded & electronics technology. Our expert team of engineers, combined with our manufacturing services and worldwide distribution has made us an ideal partner for several leading technology providers. We want to enable our partners to be successful through well designed, high quality and well manufactured hardware.

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Measure And Display The Ambient Temperature With Pmod Tc1

About the project

Project info