ESP32-S3搭建外網(wǎng)可訪問的網(wǎng)絡(luò)攝像頭（內(nèi)網(wǎng)穿透）
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本篇博文使用ESP32-S3搭建網(wǎng)絡(luò)攝像頭，相比較局域網(wǎng)攝像頭，本篇博文將分享如何搭建外網(wǎng)可以訪問的網(wǎng)絡(luò)攝像頭。
這主要是使用內(nèi)網(wǎng)穿透技術(shù)，內(nèi)網(wǎng)穿透是為了使具有某一個特定源 IP 地址和源端口號的數(shù)據(jù)包（這里指局域網(wǎng)攝像頭）不被網(wǎng)絡(luò)地址轉(zhuǎn)換設(shè)備屏蔽而正確路由到內(nèi)網(wǎng)主機。
主要流程分為兩步：
1、先實現(xiàn)局域網(wǎng)訪問網(wǎng)絡(luò)攝像頭；
2、在此基礎(chǔ)，使用內(nèi)網(wǎng)穿透的方式，搭建外網(wǎng)可訪問的網(wǎng)絡(luò)攝像頭。
1
局域網(wǎng)攝像頭
ESP32實現(xiàn)局域網(wǎng)攝像頭的方式比較簡單，驅(qū)動代碼如下：
#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
#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); // 給攝像頭供電
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);
}代碼中有幾點需要注意：
1、宏定義選擇適配的攝像頭模式。
// =================== // 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
2、無線路由器SSID和密碼要填寫正確。
// =========================== // Enter your WiFi credentials // =========================== const char* ssid = ""; const char* password = "";
3、給攝像頭供電
axp.enableCameraPower(axp.eOV2640); // 給攝像頭供電
4、板卡需要外接天線，否則可能無法連接路由器。
編譯下載程序到板卡中，確保局域網(wǎng)訪問網(wǎng)絡(luò)攝像頭可正常使用。
2
內(nèi)網(wǎng)穿透網(wǎng)絡(luò)攝像頭
內(nèi)網(wǎng)穿透我們使用花生殼這款軟件提供的內(nèi)網(wǎng)穿透服務(wù)。
在官網(wǎng)下載APP：https://hsk.oray.com/
下載安裝完成后，在內(nèi)網(wǎng)穿透服務(wù)點擊新建映射，如下圖所示：
填寫新建映射的基本信息，請注意內(nèi)網(wǎng)主機和內(nèi)網(wǎng)端口是局域網(wǎng)攝像頭的主機和端口（端口默認為80） ，如下圖所示：
新建映射完成后，可以在APP看到新增的設(shè)備列表，如下圖所示：
復(fù)制訪問****，在瀏覽器中打開：http://2j90962r69.goho.co:47918/
即使不在同一個局域網(wǎng)內(nèi)也可以正常訪問攝像頭啦。
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