ESP8266 In this IoT-based project, we will connect a Thermocouple Temperature Sensor MAX6675 to a NodeMCU ESP8266 Board and show the temperature data on a 0.96′′ OLED Display. Since the project is based on the Internet of Things (IoT), we will send the temperature data to an IoT app called Blynk. On the Blynk Application, you can check the temperature data from anywhere in the world. The device can measure temperatures between 0°C and 1024°C. So, it can be used in the industrial world. In industry, it's hard to get close to a hot object and check its temperature by hand with an Industrial Thermometer because the object is hot or the body gives off heat. So, the solution is to use some IoT devices and a Thermocouple Temperature Sensor to monitor the temperature from afar.

Here, we'll use Thermocouple MAX6675 and ESP8266 Wifi Module to make a simple project. The ESP8266 will connect to the wifi router, and since it will be connected to the internet, it will regularly send the temperature data to some online servers. The Blynk is the best and free online server. MAX7765 K-Type Thermocouple Temperature Sensor The Maxim MAX6675 K-Thermocouple to digital converter IC is used in this MAX6675 Module + K Type Thermocouple Sensor. It has an SPI- compatible digital serial interface that works with microcontrollers and gives accurate temperature measurements that take into account the temperature. It is made up of 12 bits. This converter can measure temperatures from 0°C to +700°C with a thermocouple accuracy of 8 LSBs and a resolution of 0.25°C. It can also read temperatures as high as +1024°C. Screw terminals let you connect to the spade connectors on the thermocouples, and a 5-pin standard 0.1′′ header lets you connect to a microcontroller.

Blynk is an app that runs on both Android and IOS devices and lets you use your smartphone to control any IoT-based app. It lets you make your own

graphical user interface for an Internet of Things app. Here, the MAX6675 Temperature Data will be shown on the Blynk Application. So get the Blynk app from the Google Play Store and install it. The App Store has downloads for people who use IOS. Once the app is installed, open it and sign up using your email address and password. Make a new project from the dashboard and choose "Nodemcu Board & Wifi Connection." Then, drag and drop or add two widgets, assign the variable according to the code, and send the authentication code to the email address. You will get a letter in the mail with the code. Copy this code to prove who you are. This is something your code will need.

Nodemcu ESP8266-12E Board OLED Display (0.96" I2C OLED Display) MAX6675 (Thermocouple Temperature Sensor) Jumper Wires Breadboard

The circuit diagram for interfacing MAX6675 Thermocouple with NodeMCU ESP8266 is given below.

The MAX6675 board's SCK, CS, and SO pins are connected to the NodeMCU board's D5, D6, and D7 pins. The 0.96′′ I2C OLED Display's SDA and SCL pins are connected to Nodemcu's D2 and D1 pins. Both the OLED Display and the MAX6675 work between 3.3V and 5V. So, hook up the VCC Pin to 3.3V and the GND Pin to GND. IoT Industrial Temperature Monitor with MAX6675 & ESP8266 The code should be uploaded to the Nodemcu Board. After the code is uploaded, the Nodemcu will try to connect to the network using the Wifi SSID and Password that were given. The temperature can be seen in both degrees Fahrenheit and degrees Celcius on the OLED Display. You can use

the Gas Lighter to heat the temperature sensor, which is called a thermocouple. The OLED will show how hot it is getting. You can also look at the Blynk Application. The data will come from the Blynk Server and be shown on the Blynk Application Dashboard.