Automatic Smart Door Bell using IOT

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Automatic Smart Door Bell using IOT
Security systems is one of the most researched fields of today. Through this project, you will develop an electronic device that can detect the human activity and switch on the doorbell automatically to notify the residents. The system will also be connected to the internet and can send the data to the cloud spontaneously.

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You will need an Arduino Uno board to act as the brain of the system. And the microcontroller will be connected with a WiFi module to establish an internet connection. The smart device that you build will have PIR (Passive Infra-Red) sensors that detects the human activities over a particular range and can be placed in the door.


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You will program the microcontroller in such a way that say whenever a human activity is detected by the PIR sensors, the doorbell will switch on automatically and alert the residents regarding this. You can also innovate the system further to send a notification to a user at any part of the world via sms or email. You can also use a wireless camera to stream the video live online for security purposes and program the system to unlock the doors after receiving authentication from the user.

Project description:

  1. Arduino Uno: The digital and analog input/output pins present in this board can be interfaced to various expansion boards and other circuits. Serial communication interface is a feature in this board, including USB which will be used to load the programs from computer.
  2. WiFi Module: ESP8266 WiFi module is generally used to establish the wireless communication between the devices. But this module is not capable of 5-3V logic shifting and will require an external logic level converter.
  3. PIR Sensor: This electronic sensor is used to detect the movements of humans within a certain range (5 – 12 m). It actually comprises of pyro electric sensors that detect the levels of infrared radiations.
  4. Camera Module: A camera module will be mounted onto the system to monitor the human activities outside the house
  5. Piezo Buzzer: A piezo buzzer is a loudspeaker that uses the piezoelectric effect to generate sound. It has both a piezo disc and an oscillator inside. Whenever the buzzer is powered, the oscillator generates a frequency around 2-4 kHz and the piezo element vibrates accordingly to produce the sound.
  6. Servo Motor: Servo motor is a rotary actuator or linear actuator that is capable of carrying out precise control of angular or linear position, velocity and acceleration. It uses a suitable motor coupled to a sensor for position feedback.

Project Implementation:

  1. The PIR sensor will be mounted near the door to detect the human activities
  2. Whenever a human activity is detected, the buzzer will switch ON automatically as a door bell
  3. Also the camera gets activated due to the human activity and streams live video to the user
  4. The user can then authenticate the entry of the person through an Android App
  5. The servo motors will then receive the command and facilitate unlocking of the door
  6. The data about all of this will be sent to the cloud for storage and analysis

Software requirements:

  1. You will be needing Arduino IDE software to write and upload the programming logic onto the Arduino Uno board
  2. Also, you need to create an account in the ThinkSpeak IoT platform to integrate the system onto the cloud and store the data online
Programming language: Arduino Programming (C++)

Kit required to develop Automatic Smart Door Bell using IOT:
Technologies you will learn by working on Automatic Smart Door Bell using IOT:


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