Project Hub /Security Surveillance & Defense/Intrusion Detection Systems/How to Send Email Notifications using ESP32-CAM

Intermediate

ESP32

₹500 – ₹1,500

3 – 6 Hours

Complete Kit

How to Send Email Notifications using ESP32-CAM

Learn how to build a compact, Wi-Fi-connected ESP32-CAM motion detection email alert system that captures an image via a PIR sensor and sends it directly to your email using a cloud API.

Originally published on CircuitDigest

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

ESP32 CAM WiFi Module Bluetooth with OV2640 Camera Rs. 810.00
PIR Motion Detector Sensor Module HC-SR501 Rs. 153.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
10pcs 5mm RED Diffused Light Emitting Diodes - LEDs Set Rs. 39.00
10pcs - 220 ohm 1/4 W Resistor Set Rs. 39.00
USB to UART/ESP8266 Adapter Programmer for ESP-01 WiFi Modules with CH340G Chip Rs. 99.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

This list includes a generic resistor set as a placeholder — it is not matched to the exact value or part number this circuit needs. The correct one is specified on the original source page linked above; check it before buying.

Browse all components

How It Works

This security intrusion detection system integrates an ESP32-CAM module with a PIR motion sensor to provide automated visual monitoring and instant alert notifications. The HC-SR501 PIR sensor continuously monitors its field of view for changes in infrared radiation caused by human or animal movement. When motion is detected, the sensor outputs a digital high signal to a designated GPIO pin on the ESP32-CAM. Upon receiving this trigger, the microcontroller executes code that captures a digital image using the onboard OV2640 camera sensor. Simultaneously, the system drives a red LED through a 220-ohm current-limiting resistor to provide a local visual indicator that an event has occurred. Utilizing its integrated Wi-Fi capabilities, the ESP32 connects to a local wireless network and communicates with a cloud-based API service. This service processes the captured image data and formats it into an email notification, dispatching the message directly to the user's inbox in real-time. Power distribution is managed across a breadboard using jumper wires, ensuring the 5V requirement for the PIR sensor and the appropriate power rails for the ESP32-CAM are met. If using an ESP32-CAM module without an onboard USB interface, a USB-to-Serial FTDI adapter is utilized during the Arduino IDE programming phase to flash the firmware.

Why Build This

Design and implement a cost-effective, microcontroller-based IoT security node suitable for deployment in remote or unattended locations.

Gain practical experience integrating digital sensor inputs, visual indicators, and camera peripherals within an embedded systems architecture.

Develop cloud-connected notification pipelines that bridge physical hardware triggers with modern web APIs.

Real-World Application

Home security, office surveillance, warehouse monitoring, and remote area observation where instant visual alerts are required upon motion detection.

Skills You'll Learn

Motion sensor integration

digital input reading

camera module interfacing

Wi-Fi network connectivity

cloud API communication

serial firmware flashing

power rail management

Safety Precautions

Ensure correct voltage supply (5V for the PIR sensor and appropriate power rails for the ESP32-CAM) to prevent component damage. Handle FTDI connections carefully during programming to avoid incorrect pin biasing.

Technology Tags

ESP32-CAM

PIR SENSOR

IOT

CLOUD API

IMAGE CAPTURE

WI-FI

SECURITY CAMERA

C++

ARDUINO

Frequently Asked Questions

Why do I need a USB-to-Serial FTDI adapter if the ESP32-CAM has a microcontrollers chip?

Many standard ESP32-CAM models omit the onboard USB-to-UART bridge chip to save space and reduce cost, requiring an external FTDI adapter to upload code from the Arduino IDE.

Can I power the ESP32-CAM and the PIR sensor from the same power source?

Yes, but you must ensure the power supply provides adequate current and a stable 5V rail, as inadequate power can cause brownouts during camera capture and Wi-Fi transmission.

How does the ESP32-CAM send an email without a built-in email client?

The microcontroller connects to your local Wi-Fi network and uses HTTP requests to interact with a third-party cloud API service or automation platform that handles the actual email dispatch.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-01479