ESP32 Smart Doorbell with Image Capture to Cloud

Problem statement

Conventional doorbells only ring locally; residents cannot see who visited when they were away.

Abstract

This project uses an ESP32-CAM module as a smart doorbell. When a visitor presses the bell, the camera captures an image and uploads it to cloud storage or sends it via messaging API. A buzzer rings inside the house, and owners can later see a gallery of visitors or receive instant notifications.

Components required

• ESP32-CAM module
• Push-button for doorbell
• Buzzer and chime circuit
• Wi-Fi router
• Cloud storage / Telegram/WhatsApp API
• 5V power supply
• Door-mount enclosure

Block diagram

Working

Pressing the doorbell generates an interrupt on the ESP32-CAM, which immediately captures an image frame, compresses it and uploads it using HTTP or MQTT to a server or messaging service. The same event activates a local buzzer. The owner can open the app or Telegram bot to view images of recent visitors.

Applications

• Home and apartment security
• Office reception visitor log
• Hostel room visitor monitoring
• Intro project to ESP32-CAM and cloud APIs