Enable OV5640's autofocus function on ESP32 AI-THINKER Board

This library contains the necessary firmware and source code to enable the OV5640 autofocus mode on the ESP32.

Note

Each manufacturer of OV5640 has slightly different specifications. Please check with your product first. The product I used is Waveshare's OV5640. https://www.waveshare.com/wiki/OV5640_Camera_Board_(C)

Installation

ESP32 Core Library

You need to install the ESP32 core libraries. The install instructions for your specific OS are here: https://github.com/espressif/arduino-esp32

Using Arduino Library Manager

From Arduino IDE, go to menu Sketch -> Include Library -> Manage Libraries... In Library Manager Window, search "OV5640" in the search form then select "OV5640 Auto Focus for ESP32 Camera" Click "Install" button.

Manual installation

Download zip file from this repository by selecting the green "Code" dropdown at the top of repository, select "Download ZIP" From Arduino IDE, select menu Sketch -> Include Library -> Add .ZIP Library...

Or use git:

cd ~/arduino/libraries/
git clone git@github.com:0015/ESP32-OV5640-AF.git

Then you should see the examples and be able to include the library in your projects with:

 #include "ESP32_OV5640_AF.h"

Usage

This works like a standard Arduino library. Here's a minimal example:

// Create an object from OV5640 class at the top of your sketch
OV5640 ov5640 = OV5640();

// To start OV5640, neet to pass the pointer of the esp camera sensor
sensor_t* sensor = esp_camera_sensor_get();
ov5640.start(sensor);

// Download Firmware for AF
if (ov5640.focusInit() == 0) {
 Serial.println("OV5640_Focus_Init Successful!");
}

// Set Continuous AF MODE
if (ov5640.autoFocusMode() == 0) {
 Serial.println("OV5640_Auto_Focus Successful!");
}

See the OV5640_Console_Test example for a more fully-featured example.

Hardware Modification

To use the AF function of the OV5640 on the ESP32 AI-Thinker board, you need to connect 3.3v to the last 24th pin(AF-VCC). I share what I've been working on. You can also see how AF works.

Updates

• v0.1.1
  • Only Added CONTINUOUS AUTOFOCUS Mode

License

This software is written by Eric Nam and is licensed under The MIT License. Check License file for more information.