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。
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:
1、先实现局域网访问网络摄像头;
2、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。
1、局域网摄像头
ESP32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 <WiFi.h>
-
- //
- // 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
-
- #include "camera_pins.h"
- #include "DFRobot_AXP313A.h"
-
- DFRobot_AXP313A axp;
-
- // ===========================
- // Enter your WiFi credentials
- // ===========================
- const char* ssid = "";
- const char* password = "";
-
- void startCameraServer();
- void setupLedFlash(int pin);
-
- void setup() {
- Serial.begin(115200);
- Serial.setDebugOutput(true);
- Serial.println();
-
- while(axp.begin() != 0){
- Serial.println("init error");
- delay(1000);
- }
-
- axp.enableCameraPower(axp.eOV2640); // 给摄像头供电
-
- 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
-
- // 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);
- }
-
- #if defined(CAMERA_MODEL_M5STACK_WIDE) || defined(CAMERA_MODEL_M5STACK_ESP32CAM)
- s->set_vflip(s, 1);
- s->set_hmirror(s, 1);
- #endif
-
- #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);
-
- while (WiFi.status() != WL_CONNECTED) {
- delay(500);
- Serial.print(".");
- }
- Serial.println("");
- Serial.println("WiFi connected");
-
- startCameraServer();
-
- 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);
- }
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代码中有几点需要注意:
1、宏定义选择适配的摄像头模式。
- // ===================
- // 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
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2、无线路由器SSID和密码要填写正确。
- // ===========================
- // Enter your WiFi credentials
- // ===========================
- const char* ssid = "";
- const char* password = "";
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3、给摄像头供电
- axp.enableCameraPower(axp.eOV2640); // 给摄像头供电
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4、板卡需要外接天线,否则可能无法连接路由器。
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。
2、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。
在官网下载APP:https://hsk.oray.com/
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:
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:
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: 复制访问网址,在浏览器中打开:http://2j90962r69.goho.co:47918/
即使不在同一个局域网内也可以正常访问摄像头啦。
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