IoT Electronic Door Opener

This guide will walk you through creating an IoT-based Electronic Door Opener using Raspberry Pi. The system will allow you to remotely control access to a door through a web interface or mobile app, enhancing security and convenience.

Components Required

• Raspberry Pi (Model 3 or later)
• Relay module (for controlling the electronic lock)
• Electronic lock or solenoid lock
• Power supply (for Raspberry Pi and lock)
• Connecting wires and breadboard
• Cloud service account (e.g., ThingSpeak, Blynk, or AWS IoT)
• Optional: Web camera for monitoring the door

Setting Up the Hardware

Follow these steps to set up the hardware:

1. Connect the Relay Module

   Connect the relay module to the Raspberry Pi GPIO pins. The relay will control the electronic lock, which can be triggered to open or close the door.

2. Install the Electronic Lock

   Install the electronic lock on the door. Connect the lock to the relay module to control it electronically. Ensure the lock is powered appropriately.

3. Power the System

   Ensure that both the Raspberry Pi and electronic lock are connected to suitable power sources. Check all connections for security and stability.

Programming the Raspberry Pi

Write the code to control the electronic lock and integrate it with a web interface for remote access. Below is a basic example using Python:

                import RPi.GPIO as GPIO
                from flask import Flask, request, jsonify

                app = Flask(__name__)

                # Configuration
                RELAY_PIN = 17

                # Setup
                GPIO.setmode(GPIO.BCM)
                GPIO.setup(RELAY_PIN, GPIO.OUT)
                GPIO.output(RELAY_PIN, GPIO.LOW)  # Initially lock the door

                @app.route('/unlock', methods=['POST'])
                def unlock_door():
                    GPIO.output(RELAY_PIN, GPIO.HIGH)
                    return jsonify({"status": "Door unlocked"}), 200

                @app.route('/lock', methods=['POST'])
                def lock_door():
                    GPIO.output(RELAY_PIN, GPIO.LOW)
                    return jsonify({"status": "Door locked"}), 200

                if __name__ == '__main__':
                    app.run(host='0.0.0.0', port=5000)

                try:
                    app.run()
                except KeyboardInterrupt:
                    GPIO.cleanup()
            

This code uses Flask to create a simple web server that can receive requests to lock or unlock the door. The relay controls the electronic lock based on these requests.

Setting Up Cloud Integration

To access the system remotely, deploy the Flask application on a cloud server or use a service like ngrok to expose your local server. Configure your cloud service to handle authentication and secure access to the door control endpoints.

Testing and Calibration

Test the system by sending requests to lock and unlock the door. Ensure that the electronic lock responds correctly and that the web interface or app controls the door as expected. Check for any latency or connectivity issues and adjust settings as needed.