Smart Door Intercom (Raspberry Pi 5 + Arduino + IoT)

A smart intercom and access control system built using a Raspberry Pi 5, Arduino, and Pi Camera, inspired by Edouard Renard’s Udemy course.
The system integrates computer vision, IoT messaging, and hardware control to provide remote visitor approval via Telegram.

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📌 Features

• Visitor Detection

  • Pi Camera captures a photo when a button is pressed at the door.
  • Photo is automatically sent to the user via Telegram bot.

• Remote Approval

  • User can reply “yes” or “no” directly in Telegram.
  • Response is sent back to the Raspberry Pi.

• Door Control

  • Raspberry Pi communicates with an Arduino over serial.
  • Arduino drives a servo motor to unlock the door on approval.

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🛠️ Tech Stack

• Languages: Python, Arduino C++
• Frameworks/Tools: Raspberry Pi OS, Arduino IDE, OpenCV, Telegram Bot API
• Hardware: Raspberry Pi 5, Arduino board, Pi Camera, Servo Motor, Push Button

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🚀 How It Works

1. Button Pressed → Arduino signals Raspberry Pi over serial.
2. Pi Camera takes a snapshot and sends it to Telegram.
3. User Responds in Telegram (“yes” or “no”).
4. Raspberry Pi parses the reply and sends a command back to Arduino.
5. Servo Motor rotates to unlock the door if approved.

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📷 Picture of setup

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📚 Learning Outcomes

• Gained experience integrating Raspberry Pi and Arduino in a hybrid IoT project.
• Practiced serial communication between microcontrollers.
• Implemented Telegram bot automation for real-time user interaction.
• Applied computer vision and hardware control in a practical access-control scenario.

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🔗 References

• Raspberry Pi and Arduino – Master Programming and IoT (Udemy, Edouard Renard)