Example Code for Arduino-Read Temperature

Hardware Preparation

• DFRduino UNO R3 + Gravity IO Expansion Shield * 1
• Gravity: Digital High Temperature Sensor (K-type) * 1
• K-Type Thermocouple Probe * 1 (Comes with Gravity Digital High Temperature Sensor)
• Gravity 4P sensor wire * 1 (Comes with Gravity Digital High Temperature Sensor)

Software Preparation

• Arduino IDE: Click to Download Arduino IDE from Arduino®
• Search and install 'DFRobot_MAX31855' library in the Arduino IDE library manager
• Or download and install the .zip library via Github

Wiring Diagram

Other Preparation Work

• Connect the probe and Arduino to the module according to the connection diagram. The I2C address is fixed to 0x10.
• Install DFRobot_MAX31855 library.
• Open Arduino IDE, upload the sample code to the Arduino UNO.
• Open the serial monitor of Arduino IDE.

Sample Code

/*!
  * file ReadTemp.ino
  *
  * Connect MAX31855 to arduino via I2C interface,then download this example
  * @n open serial monitor to check the temperature.
  *
  * Copyright   [DFRobot](https://www.dfrobot.com), 2016
  * Copyright   GNU Lesser General Public License
  *
  * version  V0.1
  * date  2018-3-6
  */

#include <DFRobot_MAX31855.h>

DFRobot_MAX31855 max31855;

void setup(){
  Serial.begin(9600);
}

void loop(){
  int stat;
  /*Detect I2C device*/
  stat = max31855.scan();
  if(!stat){
    Serial.println("No I2C devices!");
  }
  else{
    /*Read Celsius*/
    float temp = max31855.readCelsius();
    Serial.print("Temperature:");
    Serial.print(temp);
    Serial.println(" ℃");
  }
  delay(1000);
}

Result

• Arduino prints current temperature every one second.