Diy Internet of Things Fridge, Smart IoT Refrigerator “Nodemcu ESP8266, DS18b20, Blynk”

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Project Description:
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The internet of things based Fridge or smart IoT Refrigerators are becoming very popular because with the help of a smart IoT refrigerator you can check the temperature, food items expiry date, Door opening and closing status from anywhere around the world using the Wifi technology. In this episode you will learn how to convert any Fridge or Refrigerator into a smart internet of things based Fridge or Refrigerator using a Push Button or a limit Switch, Nodemcu ESP8266 Wifi Module, a variable resistor, DS18b20 one wire waterproof digital temperature sensor capable of measuring the temperature from -55C to 125 Centigrade, and a cell phone application designed in Blynk.

The Values are updated every second, the notification messages are sent to the owner each time the temperature increase above or decreases below a certain predefined value which can be adjusted using a variable resistor. Any value between -40 and +40 can be selected; this limit is specified in the programming which can be changed as per the requirement…..

A pushbutton or a limit switch can be used with the Fridge or a refrigerator to check if the Fridge door is opened or closed. If the door remains open for 3 minutes a notification message is sent to the owner, the three minutes delay can be increased or decreased as per the requirement…

The notification messages are sent even if the application is running in the background… if in case due to some problem the Wifi connection is disconnected a notification message is sent to the owner or supervisor. This project can be easily modified by adding more sensors and some relays for controlling the Fridge or Refrigerator.

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Amazon Purchase links:
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DS18B20 one-wire digital temperature sensor:
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LM7805 Voltage Regulator:
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