Example Code for Arduino-Get Temperature Data

Hardware Preparation

• DFRduino UNO x 1
• IR Thermometer Sensor MLX90614 x 1
• Jumper Wires

Software Preparation

• Library Files and Examples
• About Library installation
• Arduino IDE (version compatible with the library)

Wiring Diagram

Other Preparation Work

1. Install the DFRobot_MLX90614 library according to the provided installation guide.
2. Connect the hardware as per the Wiring Diagram.
3. Ensure the Arduino IDE is properly set up with the correct board and port selected.

Sample Code

/*!
 * @file        getData.ino
 * @brief       this demo demonstrates how to put the sensor enter/exit sleep mode and get temperature data measured by sensor
 * @copyright   Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @license     The MIT License (MIT)
 * @author      [qsjhyy]([email protected])
 * @version     V1.0
 * @date        2021-08-09
 * @url         https://github.com/DFRobot/DFRobot_MLX90614
 */
#include <DFRobot_MLX90614.h>

DFRobot_MLX90614_IIC sensor;   // instantiate an object to drive our sensor

void setup()
{
  Serial.begin(115200);

  // initialize the sensor
  while( NO_ERR != sensor.begin() ){
    Serial.println("Communication with device failed, please check connection");
    delay(3000);
  }
  Serial.println("Begin ok!");

  /**
   * adjust sensor sleep mode
   * mode select to enter or exit sleep mode, it's enter sleep mode by default
   *      true is to enter sleep mode
   *      false is to exit sleep mode (automatically exit sleep mode after power down and restart)
   */
  sensor.enterSleepMode();
  delay(50);
  sensor.enterSleepMode(false);
  delay(200);
}

void loop()
{
  /**
   * get ambient temperature, unit is Celsius
   * return value range： -40.01 °C ~ 85 °C
   */
  float ambientTemp = sensor.getAmbientTempCelsius();

  /**
   * get temperature of object 1, unit is Celsius
   * return value range： 
   * @n  -70.01 °C ~ 270 °C(MLX90614ESF-DCI)
   * @n  -70.01 °C ~ 380 °C(MLX90614ESF-DCC)
   */
  float objectTemp = sensor.getObjectTempCelsius();

  // print measured data in Celsius
  Serial.print("Ambient celsius : "); Serial.print(ambientTemp); Serial.println(" °C");
  Serial.print("Object celsius : ");  Serial.print(objectTemp);  Serial.println(" °C");

  // print measured data in Fahrenheit
  Serial.print("Ambient fahrenheit : "); Serial.print(ambientTemp*9/5 + 32); Serial.println(" F");
  Serial.print("Object fahrenheit : ");  Serial.print(objectTemp*9/5 + 32);  Serial.println(" F");

  Serial.println();
  delay(500);
}
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Result