Overview

Turn an ESP32-CAM into a smart photo capture and email notification device. With two push buttons and a small OLED screen, this build lets you take a picture and then send it directly to an email address over Wi-Fi using a cloud email API. It’s ideal for DIY security, remote monitoring, or just learning how to integrate camera IoT designs with cloud services.

What You’ll Build

When a button is pressed, the system:

  1. Captures a photo using the ESP32-CAM onboard camera.

  2. Displays status on the OLED (e.g., “Capturing”, “Sending”).

  3. Sends the image via HTTPS to a cloud email API.

  4. Receives the image in your inbox with the photo attached.

Required Parts

These are the components needed for Image Capture and Email Notification Using ESP32-CAM

ComponentPurpose
ESP32-CAM moduleCamera + Wi-Fi brain of the project
2 × Push ButtonsOne to take a photo, one to send it
I2C OLED DisplayShows status messages
Breadboard + Jumper WiresFor wiring everything together
Note: If your ESP32-CAM doesn’t have a USB port, use a USB-to-TTL adapter to program it.

How It Works

  1. Power & Setup:
    Connect the ESP32-CAM, OLED display, and buttons on a breadboard. Set the I2C pins for the OLED and assign GPIOs for the buttons.

  2. Button A — Capture:
    When pressed, the camera module snaps a photo. The OLED displays a flash animation and a “Done” message when the image is stored in memory.

  3. Button B — Send:
    After capturing, press the second button. The ESP32 CAM connects to your Wi-Fi and sends the stored image to a cloud API endpoint. This API relays the photo to your registered email.

  4. Email Delivery:
    The email arrives with the photo attached, letting you view or download it immediately.

Code Highlights

Your sketch will:

  • Initialize the camera and Wi-Fi.

  • Wait for button presses for capture and send actions.

  • Use secure HTTPS to communicate with a cloud email API.

  • Update the OLED display with status messages like BOOT, CAPTURE, SENT, or error messages.

Key features in the code include:

  • esp_camera.h — Camera interface

  • WiFi & WiFiClientSecure.h — Wi-Fi and secure HTTP

  • Adafruit_SSD1306 & Wire.h — OLED control 

#include "esp_camera.h"
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <Wire.h>
#include <Adafruit_SSD1306.h>
// (… setup, buttons, camera init, Wi-Fi logic here …)

void loop() {  // Check buttons  // Capture photo when button A is pressed  // Send photo when button B is pressed  // Update OLED status
}

(Adapt this template to include API keys and Wi-Fi credentials.)

Practical Uses

  • Home security camera trigger system

  • Email alerts with visual confirmation

  • Visitor verification without dedicated hardware

  • IoT learning platform for camera + cloud integrations

Next Steps (Future Enhancements)

  • SD card support: Save photos locally before email.

  • Autotrigger: Add motion sensor (PIR) to capture/send automatically.

  • Mobile dashboards: Build an app or web interface to view images.

  • Facial recognition: Add basic AI to detect people.

Tips & Troubleshooting

  • Ensure stable 5 V power — ESP32-CAM is sensitive to drops.

  • Check Wi-Fi SSID/password carefully in the code.

  • Confirm API key and cloud endpoint details match the service you’re using. 

Explore a curated list of ESP32-CAM Projects.