๐ ๏ธ MAKER GUIDEApr 12, 2026โขโฑ๏ธ 2 min readโข๐ณ๐ต Tested in Nepal
Smart Video Doorbell with ESP32-CAM & Instant Telegram Photo Notifications
Capture high-resolution visitor snapshots when your front door button is pressed and receive instant photo alerts with timestamps directly in your Telegram messenger.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
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Estimated Total (5/5 items):
NPRย 2,210
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NPRย 1,650
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NPRย 200
Smart Video Doorbell with ESP32-CAM & Instant Telegram Photo Notifications
When a visitor presses the doorbell tactile button, the ESP32-CAM Module captures a 2MP JPEG snapshot using its OV2640 camera, sounds a gentle indoor buzzer, and dispatches the photo directly to your personal Telegram Bot over Wi-Fi.
Hardware Bill of Materials (In Stock at Ghumti Pasal):
- Camera Board: ESP32-CAM WiFi Bluetooth Camera Module OV2640 with FT232RL FTDI Programmer
- Doorbell Input: 2x Push Switch 12x12x7.3mm Tactile Push Button
- Indoor Alert: Active Buzzer (5V)
- Power Supply: 5V 2A Power Adapter
- Wiring: 40pcs 20cm 2.54mm Female to Female Dupont Wire Jumper Cable
Circuit Pinout & Wiring Connections:
| Component / Module Pin | ESP32-CAM Pin | Function / Description |
|---|---|---|
| Push Button Pin 1 | GPIO 13 (INPUT_PULLUP) | Doorbell Ring Trigger Contact |
| Push Button Pin 2 | GND | Ground Reference |
| Active Buzzer (+) | GPIO 12 | Local Chime Output |
| Active Buzzer (-) | GND | Ground |
| FTDI TX / RX (Flashing) | U0R (GPIO 3) / U0T (GPIO 1) | Serial Firmware Upload Interface |
| Flash Jumper (Flashing) | GPIO 0 to GND | Bootloader Programming Mode |
| Power 5V / GND | 5V / GND | Dedicated 2A Regulated Power Supply |
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Underground Sump & Water Well Depth Monitoring with Hydrostatic Pressure Sensor & ESP32
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