Using Melexis Non-Contact MLX90614 Infrared Thermometer with ESP32 over Bluetooth
In this tutorial, you will learn how to display temperature on a mobile phone over Bluetooth using an ESP32 Arduino board with an MLX90614 infrared non-contact temperature sensor.
🔴Infrared non-contact temperature sensor
337-Arduino Code to measure Temperature using MLX90614 with ESP32
Langue: C++
/*
* //*
*/
*
*
* This is Arduino code to Measure Temperature over Bluetooth using
MLX90614 with ESP32
* Watch video instruction for this code: https: // youtu.be/HpsvNIAtjm4
* Written/updated by Ahmad Shamshiri for Robojax Video channel www.Robojax.com
* Date: July 01, 2020, in Ajax, Ontario, Canada
Related Videos:
Related videos:
Introduction to MLX90614 Non-Contact https: // youtu.be/cFDSqiEIunw
Display Temperature on LCD from MLX90614: https: // youtu.be/_iO2L4P_irw
Measure temperature using MLX90614 Over WiFi:
* this code has been downloaded from https: // robojax.com
* Get this code and other Arduino codes from Robojax.com
Learn Arduino step by step in structured course with all material, wiring diagram and library
all in once place. Purchase My course on Udemy.com http: // robojax.com/L/?id=62
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* * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.*
* This code has been download from Robojax.com
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https: // www.gnu.org/licenses/>.
*/
#include <Wire.h>
#include <Adafruit_MLX90614.h>
char *typeName[]={"Object: ","Ambient: "};
float tempC, tempF, tempK, tempCA, tempFA, tempKA;
int type=1; // 1=C, 2=F, 3=K,
int showAmbient =1; // 1=oui, 0=non
Adafruit_MLX90614 mlx = Adafruit_MLX90614();
#include "BluetoothSerial.h"
#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif
BluetoothSerial SerialBT;
int inData;
char receivedChar; // la valeur reçue sera stockée sous forme de CHAR dans cette variable
void setup() {
Serial.begin(115200);
SerialBT.begin("ESP32_Robojax"); // Nom de l'appareil Bluetooth
Serial.println("The device started, now you can pair it with bluetooth!");
Serial.println("Search for ESP32_Robojax device and Pair your phone to ESP32_Robojax");
mlx.begin();
// Robojax.com MLX90614 avec Bluetooth ESP32
}
void loop() {
getTemp();
// Robojax.com MLX90614 avec Bluetooth ESP32
if (Serial.available()) {
// SerialBT.write(Serial.read());
}
while (SerialBT.available() ) {
receivedChar =(char)SerialBT.read();
inData += receivedChar;
if (receivedChar == '\n')
{
// SerialBT.print("Reçu :");// écrire sur l'application BT
// SerialBT.println(inData);// écriture sur l'application BT
// Serial.print("Reçu :");//imprimer sur le moniteur série
// Serial.println(inData); //imprimer sur le moniteur série
type = inData;
sendTemp();
inData = 0; // Effacer le tampon reçu
} // si (reçuChar
} // alors que
// Série.println(servo1Angle);
delay(20);
// Robojax.com MLX90614 avec Bluetooth ESP32
} // la boucle se termine ici
void sendTemp()
{
// Robojax.com MLX90614 avec Bluetooth ESP32
if(type ==24)
{
SerialBT.print(typeName[0]);
SerialBT.print(tempC); // température de l'objet
SerialBT.println("°C");
Serial.print("Temperature:"); // imprimer sur le moniteur série
Serial.println(tempC); // imprimer sur le moniteur série
if(showAmbient)
{
SerialBT.print(typeName[1]);
SerialBT.print(tempCA); // température ambiante
SerialBT.println("°C");
}
}
if(type ==25)
{
SerialBT.print(typeName[0]);
SerialBT.print(tempF); // température de l'objet
SerialBT.println("°F");
if(showAmbient)
{
SerialBT.print(typeName[1]);
SerialBT.print(tempFA); // température ambiante
SerialBT.println("°F");
}
}
if(type ==26)
{
SerialBT.print(typeName[0]);
SerialBT.print(tempC); // température de l'objet
SerialBT.println("°K");
if(showAmbient)
{
SerialBT.print(typeName[1]);
SerialBT.print(tempKA); // température ambiante
SerialBT.println("°K");
}
}
// Robojax.com MLX90614 avec Bluetooth ESP32
} // sendTemp se termine ici
/*
* @brief renvoie la température ou l'humidité relative
* @return renvoie l'une des valeurs ci-dessus
* Utilisation : pour obtenir les degrés Fahrenheit, tapez : getTemp('F')
* pour afficher la valeur sur un moniteur série : Serial.println(getTemp('F'));
* Rédigé par Ahmad Shamshiri le 30 mars 2020.
* à Ajax, Ontario, Canada
* www.Robojax.com
*/
void getTemp()
{
// Code Robojax.com MLX90614
tempC = mlx.readObjectTempC(); // dans l'objet C
tempCA = mlx.readAmbientTempC();
tempF = mlx.readObjectTempF(); // Fah. Objet
tempFA = mlx.readAmbientTempF(); // Fah Ambient
tempK = tempC + 273.15; // Objet Kelvin
tempKA = tempCA + 273.15; // Kelvin ambiant
// Code Robojax.com MLX90614
} // obtenir la température
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