有手就行的ESP32-CAM监控教程

01、简介

? 基于esp32-cam的一个小东西。花了很多时间在网上找教程，发现基本都是使用的arduino实现的，但是使用arduino下载开发板就没成功过[流泪] [流泪]；于是找到一个替代的工具 -- 简单，快捷（vscode）。

02、准备

• 开发环境安装

  1. 安装vscode
  2. vscode中安装platformio插件

• 材料

  1. esp32-cam开发板
  2. USB TO TTL 下载器
  3. 杜邦线一根

• 接线

03、配置项目

? 当platformio插件安装成功后，左侧出现一个蚂蚁头像。

1. 创建项目选择 -> AI Thinker ESP32-CAM板子 ; Framework -> Arduino
2. 下载 https://github.com/arkhipenko/esp32-cam-mjpeg 开源项目
3. 目录结构(修改)
   • lib
     • OV2640
       • OV2640.cpp
       • OV2640.h
   • src
     • camera_pins.h
     • home_wifi_multi.h
     • main.cpp
   • platformio.ini

04、源代码

• OV2640.cpp

#include "OV2640.h"

#define TAG "OV2640"

// definitions appropriate for the ESP32-CAM devboard (and most clones)
camera_config_t esp32cam_config{

    .pin_pwdn = -1, // FIXME: on the TTGO T-Journal I think this is GPIO 0
    .pin_reset = 15,

    .pin_xclk = 27,

    .pin_sscb_sda = 25,
    .pin_sscb_scl = 23,

    .pin_d7 = 19,
    .pin_d6 = 36,
    .pin_d5 = 18,
    .pin_d4 = 39,
    .pin_d3 = 5,
    .pin_d2 = 34,
    .pin_d1 = 35,
    .pin_d0 = 17,
    .pin_vsync = 22,
    .pin_href = 26,
    .pin_pclk = 21,
    .xclk_freq_hz = 20000000,
    .ledc_timer = LEDC_TIMER_0,
    .ledc_channel = LEDC_CHANNEL_0,
    .pixel_format = PIXFORMAT_JPEG,
    // .frame_size = FRAMESIZE_UXGA, // needs 234K of framebuffer space
    // .frame_size = FRAMESIZE_SXGA, // needs 160K for framebuffer
    // .frame_size = FRAMESIZE_XGA, // needs 96K or even smaller FRAMESIZE_SVGA - can work if using only 1 fb
    .frame_size = FRAMESIZE_SVGA,
    .jpeg_quality = 12, //0-63 lower numbers are higher quality
    .fb_count = 2       // if more than one i2s runs in continous mode.  Use only with jpeg
};

camera_config_t esp32cam_aithinker_config{

    .pin_pwdn = 32,
    .pin_reset = -1,

    .pin_xclk = 0,

    .pin_sscb_sda = 26,
    .pin_sscb_scl = 27,

    // Note: LED GPIO is apparently 4 not sure where that goes
    // per https://github.com/donny681/ESP32_CAMERA_QR/blob/e4ef44549876457cd841f33a0892c82a71f35358/main/led.c
    .pin_d7 = 35,
    .pin_d6 = 34,
    .pin_d5 = 39,
    .pin_d4 = 36,
    .pin_d3 = 21,
    .pin_d2 = 19,
    .pin_d1 = 18,
    .pin_d0 = 5,
    .pin_vsync = 25,
    .pin_href = 23,
    .pin_pclk = 22,
    .xclk_freq_hz = 20000000,
    .ledc_timer = LEDC_TIMER_1,
    .ledc_channel = LEDC_CHANNEL_1,
    .pixel_format = PIXFORMAT_JPEG,
    // .frame_size = FRAMESIZE_UXGA, // needs 234K of framebuffer space
    // .frame_size = FRAMESIZE_SXGA, // needs 160K for framebuffer
    // .frame_size = FRAMESIZE_XGA, // needs 96K or even smaller FRAMESIZE_SVGA - can work if using only 1 fb
    .frame_size = FRAMESIZE_SVGA,
    .jpeg_quality = 12, //0-63 lower numbers are higher quality
    .fb_count = 2       // if more than one i2s runs in continous mode.  Use only with jpeg
};

camera_config_t esp32cam_ttgo_t_config{

    .pin_pwdn = 26,
    .pin_reset = -1,

    .pin_xclk = 32,

    .pin_sscb_sda = 13,
    .pin_sscb_scl = 12,

    .pin_d7 = 39,
    .pin_d6 = 36,
    .pin_d5 = 23,
    .pin_d4 = 18,
    .pin_d3 = 15,
    .pin_d2 = 4,
    .pin_d1 = 14,
    .pin_d0 = 5,
    .pin_vsync = 27,
    .pin_href = 25,
    .pin_pclk = 19,
    .xclk_freq_hz = 20000000,
    .ledc_timer = LEDC_TIMER_0,
    .ledc_channel = LEDC_CHANNEL_0,
    .pixel_format = PIXFORMAT_JPEG,
    .frame_size = FRAMESIZE_SVGA,
    .jpeg_quality = 12, //0-63 lower numbers are higher quality
    .fb_count = 2       // if more than one i2s runs in continous mode.  Use only with jpeg
};

void OV2640::run(void)
{
    if (fb)
        //return the frame buffer back to the driver for reuse
        esp_camera_fb_return(fb);

    fb = esp_camera_fb_get();
}

void OV2640::runIfNeeded(void)
{
    if (!fb)
        run();
}

int OV2640::getWidth(void)
{
    runIfNeeded();
    r