ESP32-S3搭建外网可访问的网络摄像头（内网穿透）

硬件笔记本

von13gkqhho64023062042.gif

+ e( e% ^- o9 g0 R点击上方蓝色字体，关注我们
本篇博文使用ESP32-S3搭建网络摄像头，相比较局域网摄像头，本篇博文将分享如何搭建外网可以访问的网络摄像头。
9 C4 F( a& \% v  l' n& |这主要是使用内网穿透技术，内网穿透是为了使具有某一个特定源 IP 地址和源端口号的数据包（这里指局域网摄像头）不被网络地址转换设备屏蔽而正确路由到内网主机。
主要流程分为两步：
7 y% g( F& W7 d) N: t: C7 Z: P0 T1、先实现局域网访问网络摄像头；
  B3 q/ K1 q) \& a+ w  [. S8 h2、在此基础，使用内网穿透的方式，搭建外网可访问的网络摄像头。
8 g+ N- i" D3 `1
* y7 c: a! r+ o' h局域网摄像头
$ c8 ^8 a, ]6 c7 l4 t) mESP32实现局域网摄像头的方式比较简单，驱动代码如下：

#include "esp_camera.h"#include
//// WARNING!!! PSRAM IC required for UXGA resolution and high JPEG quality//            Ensure ESP32 Wrover Module or other board with PSRAM is selected//            Partial images will be transmitted if image exceeds buffer size////            You must select partition scheme from the board menu that has at least 3MB APP space.//            Face Recognition is DISABLED for ESP32 and ESP32-S2, because it takes up from 15 //            seconds to process single frame. Face Detection is ENABLED if PSRAM is enabled as well
// ===================// Select camera model// ===================//#define CAMERA_MODEL_WROVER_KIT // Has PSRAM// #define CAMERA_MODEL_ESP_EYE // Has PSRAM//#define CAMERA_MODEL_ESP32S3_EYE // Has PSRAM//#define CAMERA_MODEL_M5STACK_PSRAM // Has PSRAM//#define CAMERA_MODEL_M5STACK_V2_PSRAM // M5Camera version B Has PSRAM//#define CAMERA_MODEL_M5STACK_WIDE // Has PSRAM//#define CAMERA_MODEL_M5STACK_ESP32CAM // No PSRAM//#define CAMERA_MODEL_M5STACK_UNITCAM // No PSRAM//#define CAMERA_MODEL_AI_THINKER // Has PSRAM//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM//#define CAMERA_MODEL_XIAO_ESP32S3 // Has PSRAM// ** Espressif Internal Boards **//#define CAMERA_MODEL_ESP32_CAM_BOARD//#define CAMERA_MODEL_ESP32S2_CAM_BOARD//#define CAMERA_MODEL_ESP32S3_CAM_LCD#define CAMERA_MODEL_DFRobot_FireBeetle2_ESP32S3 // Has PSRAM//#define CAMERA_MODEL_DFRobot_Romeo_ESP32S3 // Has PSRAM
4 N4 I( j, T: _" A6 x  Y#include "camera_pins.h"#include "DFRobot_AXP313A.h"
/ h4 E) h1 s: m) i, _, J. sDFRobot_AXP313A axp;
// ===========================// Enter your WiFi credentials// ===========================const char* ssid = "";const char* password = "";
void startCameraServer();void setupLedFlash(int pin);
- w% y0 r+ L3 M  N7 p$ Xvoid setup() {  Serial.begin(115200);  Serial.setDebugOutput(true);  Serial.println();
  while(axp.begin() != 0){    Serial.println("init error");    delay(1000);  }
4 a  L( }. L+ F! r+ b5 T  axp.enableCameraPower(axp.eOV2640);  // 给摄像头供电
: I4 r" b3 `) C/ i! }0 M. F  camera_config_t config;  config.ledc_channel = LEDC_CHANNEL_0;  config.ledc_timer = LEDC_TIMER_0;  config.pin_d0 = Y2_GPIO_NUM;  config.pin_d1 = Y3_GPIO_NUM;  config.pin_d2 = Y4_GPIO_NUM;  config.pin_d3 = Y5_GPIO_NUM;  config.pin_d4 = Y6_GPIO_NUM;  config.pin_d5 = Y7_GPIO_NUM;  config.pin_d6 = Y8_GPIO_NUM;  config.pin_d7 = Y9_GPIO_NUM;  config.pin_xclk = XCLK_GPIO_NUM;  config.pin_pclk = PCLK_GPIO_NUM;  config.pin_vsync = VSYNC_GPIO_NUM;  config.pin_href = HREF_GPIO_NUM;  config.pin_sccb_sda = SIOD_GPIO_NUM;  config.pin_sccb_scl = SIOC_GPIO_NUM;  config.pin_pwdn = PWDN_GPIO_NUM;  config.pin_reset = RESET_GPIO_NUM;  config.xclk_freq_hz = 20000000;  config.frame_size = FRAMESIZE_UXGA;  config.pixel_format = PIXFORMAT_JPEG; // for streaming  //config.pixel_format = PIXFORMAT_RGB565; // for face detection/recognition  config.grab_mode = CAMERA_GRAB_WHEN_EMPTY;  config.fb_location = CAMERA_FB_IN_PSRAM;  config.jpeg_quality = 12;  config.fb_count = 1;
  // if PSRAM IC present, init with UXGA resolution and higher JPEG quality  //                      for larger pre-allocated frame buffer.  if(config.pixel_format == PIXFORMAT_JPEG){    if(psramFound()){      config.jpeg_quality = 10;      config.fb_count = 2;      config.grab_mode = CAMERA_GRAB_LATEST;    } else {      // Limit the frame size when PSRAM is not available      config.frame_size = FRAMESIZE_SVGA;      config.fb_location = CAMERA_FB_IN_DRAM;    }  } else {    // Best option for face detection/recognition    config.frame_size = FRAMESIZE_240X240;#if CONFIG_IDF_TARGET_ESP32S3    config.fb_count = 2;#endif  }
#if defined(CAMERA_MODEL_ESP_EYE)  pinMode(13, INPUT_PULLUP);  pinMode(14, INPUT_PULLUP);#endif
' o& o& W' }" F- S! q  // camera init  esp_err_t err = esp_camera_init(&config);  if (err != ESP_OK) {    Serial.printf("Camera init failed with error 0x%x", err);    return;  }
  sensor_t * s = esp_camera_sensor_get();  // initial sensors are flipped vertically and colors are a bit saturated  if (s->id.PID == OV3660_PID) {    s->set_vflip(s, 1); // flip it back    s->set_brightness(s, 1); // up the brightness just a bit    s->set_saturation(s, -2); // lower the saturation  }  // drop down frame size for higher initial frame rate  if(config.pixel_format == PIXFORMAT_JPEG){    s->set_framesize(s, FRAMESIZE_QVGA);  }
: X  d0 ~+ |1 t$ ~1 \) u#if defined(CAMERA_MODEL_M5STACK_WIDE) || defined(CAMERA_MODEL_M5STACK_ESP32CAM)  s->set_vflip(s, 1);  s->set_hmirror(s, 1);#endif
5 R! A( W' H! L( @/ h4 k8 x& ?#if defined(CAMERA_MODEL_ESP32S3_EYE)  s->set_vflip(s, 1);#endif
// Setup LED FLash if LED pin is defined in camera_pins.h#if defined(LED_GPIO_NUM)  setupLedFlash(LED_GPIO_NUM);#endif
  WiFi.begin(ssid, password);  WiFi.setSleep(false);
4 T* M/ B% z  {% P  while (WiFi.status() != WL_CONNECTED) {    delay(500);    Serial.print(".");  }  Serial.println("");  Serial.println("WiFi connected");
  startCameraServer();
  H2 B2 r4 T/ r  Serial.print("Camera Ready! Use 'http://");  Serial.print(WiFi.localIP());  Serial.println("' to connect");}
void loop() {  // Do nothing. Everything is done in another task by the web server  delay(10000);}
代码中有几点需要注意：

% f4 }! S( ]2 E, z( C6 C  H, x* R% e1、宏定义选择适配的摄像头模式。
/ F% t: G; i- t  x) Z2 S+ s

// ===================// Select camera model// ===================//#define CAMERA_MODEL_WROVER_KIT // Has PSRAM// #define CAMERA_MODEL_ESP_EYE // Has PSRAM//#define CAMERA_MODEL_ESP32S3_EYE // Has PSRAM//#define CAMERA_MODEL_M5STACK_PSRAM // Has PSRAM//#define CAMERA_MODEL_M5STACK_V2_PSRAM // M5Camera version B Has PSRAM//#define CAMERA_MODEL_M5STACK_WIDE // Has PSRAM//#define CAMERA_MODEL_M5STACK_ESP32CAM // No PSRAM//#define CAMERA_MODEL_M5STACK_UNITCAM // No PSRAM//#define CAMERA_MODEL_AI_THINKER // Has PSRAM//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM//#define CAMERA_MODEL_XIAO_ESP32S3 // Has PSRAM// ** Espressif Internal Boards **//#define CAMERA_MODEL_ESP32_CAM_BOARD//#define CAMERA_MODEL_ESP32S2_CAM_BOARD//#define CAMERA_MODEL_ESP32S3_CAM_LCD#define CAMERA_MODEL_DFRobot_FireBeetle2_ESP32S3 // Has PSRAM//#define CAMERA_MODEL_DFRobot_Romeo_ESP32S3 // Has PSRAM
3 v( Y  |5 ], L0 X+ j2、无线路由器SSID和密码要填写正确。

// ===========================// Enter your WiFi credentials// ===========================const char* ssid = "";const char* password = "";
3、给摄像头供电
/ y$ s6 s. X0 B2 d2 ?* L# U

axp.enableCameraPower(axp.eOV2640);  // 给摄像头供电
4、板卡需要外接天线，否则可能无法连接路由器。

7 X1 F0 Y9 Y- F% x2 j7 `编译下载程序到板卡中，确保局域网访问网络摄像头可正常使用。
+ e' c9 n; I: S4 ]) ?  q7 ~$ V2
" u4 I3 @" m/ M# r% ^8 d% _内网穿透网络摄像头
内网穿透我们使用花生壳这款软件提供的内网穿透服务。

bhp4yyhj5vh64023062142.png

在官网下载APP：https://hsk.oray.com/

7 ~0 Z' a" g& e" |9 v3 I下载安装完成后，在内网穿透服务点击新建映射，如下图所示：

t4a4vslzp0u64023062242.png

6 f0 b; ~7 r3 o" _1 K+ V3 m填写新建映射的基本信息，请注意内网主机和内网端口是局域网摄像头的主机和端口（端口默认为80） ，如下图所示：

2izd0v4nrch64023062343.png

6 [) L% n# z) Q/ [
新建映射完成后，可以在APP看到新增的设备列表，如下图所示：

  c  p' l9 i  x& a

zn0jm4glh0564023062443.png

3 W& D  @9 Y. w* Y( @* i复制访问网址，在浏览器中打开：http://2j90962r69.goho.co:47918/

* I; y; P% h1 F- [' ]* V+ V即使不在同一个局域网内也可以正常访问摄像头啦。

co5541bktqx64023062543.png

6 b: n/ _' p: d* K( U; c4 a6 T5 y. F

1l4p35bmys064023062643.png

5 g- T  L) U3 b, @4 f- o+ V$ a往期推荐HarmonyOS学习路之开发篇—Java UI框架(Position和AdaptiveBox layout)
Python数据可视化：如何选择合适的图表可视化？
! D+ l' L) r: f+ X$ h  l磁耦合共振无线供电装置
Python Qt GUI设计：表格和树类（提升篇—1）
9 L9 ~% l  E! c9 G( l" i

brbiutrx2if64023062743.jpg

4 c6 A" B( k' X5 n

pgpa5cv4whb64023062843.gif

点击阅读原文，更精彩~