ESP32-Cam Wi-Fi + Bluetooth with OV2640 Camera Module

ESP32-Cam OV2640 Camera Module – Overview

The ESP32-Cam Wi-Fi + Bluetooth with OV2640 Camera Module combines a 2MP OV2640 image sensor with the versatile ESP32-S microcontroller to deliver an affordable, compact solution for IoT cameras, remote monitoring, robotics and maker projects. This module offers wireless connectivity, expandable storage and a rich set of interfaces for easy integration into embedded systems.

Why choose the ESP32-Cam OV2640?

• Low-cost, high-value camera module ideal for prototyping and production.
• Wireless connectivity via 802.11 b/g/n Wi-Fi and Bluetooth 4.2 (BR/EDR and BLE).
• Powerful ESP32-S dual-core processor for real-time image handling and processing.
• Small footprint for integration into space-constrained designs.

Key Features

• Camera – OV2640 2MP sensor supporting up to 1600 x 1200 resolution.
• Wireless – Wi-Fi 802.11 b/g/n and Bluetooth 4.2 (BR/EDR + BLE).
• Processor – ESP32-S dual-core 32-bit LX6, 160/240 MHz, 600 DMIPS.
• Memory – 4MB PSRAM and 8MB Flash for image buffering and storage.
• Storage – MicroSD card slot supporting cards up to 4GB for local recording.
• Interfaces – Multiple GPIOs with UART, SPI, I2C and PWM support for sensors and actuators.
• Size and Power – Compact 40mm x 27mm module with energy-efficient operation, suitable for battery-powered projects.

Specifications

• Camera: OV2640, 2MP (1600 x 1200)
• Wi-Fi: 802.11 b/g/n
• Bluetooth: Bluetooth 4.2 BR/EDR and BLE
• Processor: ESP32-S dual-core 32-bit LX6 (160/240 MHz)
• Memory: 4MB PSRAM, 8MB Flash
• MicroSD Card Slot: Supports up to 4GB
• Dimensions: 40mm x 27mm
• Operating Voltage: 5V
• Interfaces: Multiple GPIOs, UART, SPI, I2C, PWM

Applications

This module is suited for a wide range of applications including:

• IoT devices and smart home cameras – security cameras, baby monitors and pet cams.
• Remote surveillance – wildlife monitoring, time-lapse and remote observation systems.
• Robotics – vision-based navigation, object detection and simple computer vision tasks.
• Maker and DIY projects – rapid prototyping for hobbyists and educators.

Getting Started – Powering and Programming

Power

• Operating voltage: 5V input (ensure a stable supply capable of peak camera/Wi-Fi current).
• For battery projects, use a regulated 5V source or a step-up converter sized for peak draw.

Programming Options

• Arduino IDE – popular and beginner-friendly, large community examples for ESP32-Cam.
• ESP-IDF – native development framework for advanced performance and control.
• MicroPython – lightweight Python option for quick scripting and prototyping.

Pinout and Interfaces

The module exposes multiple GPIOs and standard interfaces for sensors and peripherals. Typical interfaces include UART for serial communication, SPI and I2C for high-speed and sensor buses, and PWM for motor and LED control. Refer to community pinout diagrams for exact GPIO assignments when connecting external hardware.

Benefits

• Enhanced Connectivity – Dual-mode Wi-Fi and Bluetooth make it easy to connect to networks and devices.
• High-Quality Imaging – OV2640 delivers clear stills and acceptable video for many surveillance and IoT use cases.
• Flexible Integration – Multiple interfaces and expandable storage enable diverse applications.
• Compact and Efficient – Small size and low power make it suitable for embedded and portable systems.

Tips and Considerations

• Use a stable 5V supply to avoid resets during Wi-Fi transmission or image capture.
• If you need longer video recording, use a high-quality MicroSD card and monitor write speeds.
• Check GPIO conflicts before adding shields or sensors – some pins are used by the camera interface.
• Enable proper camera configuration and resolution settings in your firmware for best results.

Resources

• Community libraries and example projects for Arduino IDE and ESP-IDF.
• Open source tutorials for setting up streaming, motion detection and face recognition.

The ESP32-Cam Wi-Fi + Bluetooth with OV2640 Camera Module is a versatile, cost-effective option for adding imaging and wireless connectivity to your next IoT or embedded project.

Note: Images are for illustration purposes only.