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ESP32-CAM 在網站上影片串流

本篇文章中,我將使用 ESP32-CAM 開發板建構一個 Web 監控攝像頭以及一個門鈴監控器。ESP32 攝影鏡頭將託管給一個視頻流網絡服務器,您可以使用網絡中的任何設備訪問該服務器。

您可以將此視頻流 Web 服務器與Home AssistantNode-RED或自建一個網站等流行的家庭自動化平台整合。在本教程中,我們將向您展示如何將其與 Home Assistant 和 Node-RED或自建網站 整合。

您需要以下零件:

  • ESP32-CAM
  • USB to TTL轉接線(PL2303或CH340)
  • 母對母跳線
  •  3D列印一組攝影鏡頭外殼
  • ESP32-CAM 5V電源
  • Nginx Server 設定網域對內IP用

介紹ESP32-CAM

ESP32 -CAM是一款非常小的攝影鏡頭模組,採用 ESP32-S 晶片,成本不到 300 元台幣。您可以閱讀我們的 ESP32-CAM 入門指南並了解如何使用視頻流和人臉識別範例。

Video Streaming 服務器

按照以下步驟使用 ESP32-CAM 建構Video Streaming Web 服務器,您可以在local端網路上訪問該服務器。 

1.安裝ESP32外掛

在本例中,我們使用 Arduino IDE 對 ESP32-CAM 開發板進行編程。因此,您需要安裝 Arduino IDE 以及 ESP32 外掛。如果您還沒有安裝 ESP32 外掛,請安裝之。

2. Video Streaming網路服務器程式碼

接著,將下面的程式碼複製到您的 Arduino IDE。

/*********
  Rui Santos
  Complete project details at https://RandomNerdTutorials.com/esp32-cam-video-streaming-web-server-camera-home-assistant/
  
  IMPORTANT!!! 
   - Select Board "AI Thinker ESP32-CAM"
   - GPIO 0 must be connected to GND to upload a sketch
   - After connecting GPIO 0 to GND, press the ESP32-CAM on-board RESET button to put your board in flashing mode
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files.

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
*********/

#include "esp_camera.h"
#include 
#include "esp_timer.h"
#include "img_converters.h"
#include "Arduino.h"
#include "fb_gfx.h"
#include "soc/soc.h" //disable brownout problems
#include "soc/rtc_cntl_reg.h"  //disable brownout problems
#include "esp_http_server.h"

//Replace with your network credentials
const char* ssid = "REPLACE_WITH_YOUR_SSID";
const char* password = "REPLACE_WITH_YOUR_PASSWORD";

#define PART_BOUNDARY "123456789000000000000987654321"

// This project was tested with the AI Thinker Model, M5STACK PSRAM Model and M5STACK WITHOUT PSRAM
#define CAMERA_MODEL_AI_THINKER
//#define CAMERA_MODEL_M5STACK_PSRAM
//#define CAMERA_MODEL_M5STACK_WITHOUT_PSRAM

// Not tested with this model
//#define CAMERA_MODEL_WROVER_KIT

#if defined(CAMERA_MODEL_WROVER_KIT)
  #define PWDN_GPIO_NUM    -1
  #define RESET_GPIO_NUM   -1
  #define XCLK_GPIO_NUM    21
  #define SIOD_GPIO_NUM    26
  #define SIOC_GPIO_NUM    27
  
  #define Y9_GPIO_NUM      35
  #define Y8_GPIO_NUM      34
  #define Y7_GPIO_NUM      39
  #define Y6_GPIO_NUM      36
  #define Y5_GPIO_NUM      19
  #define Y4_GPIO_NUM      18
  #define Y3_GPIO_NUM       5
  #define Y2_GPIO_NUM       4
  #define VSYNC_GPIO_NUM   25
  #define HREF_GPIO_NUM    23
  #define PCLK_GPIO_NUM    22

#elif defined(CAMERA_MODEL_M5STACK_PSRAM)
  #define PWDN_GPIO_NUM     -1
  #define RESET_GPIO_NUM    15
  #define XCLK_GPIO_NUM     27
  #define SIOD_GPIO_NUM     25
  #define SIOC_GPIO_NUM     23
  
  #define Y9_GPIO_NUM       19
  #define Y8_GPIO_NUM       36
  #define Y7_GPIO_NUM       18
  #define Y6_GPIO_NUM       39
  #define Y5_GPIO_NUM        5
  #define Y4_GPIO_NUM       34
  #define Y3_GPIO_NUM       35
  #define Y2_GPIO_NUM       32
  #define VSYNC_GPIO_NUM    22
  #define HREF_GPIO_NUM     26
  #define PCLK_GPIO_NUM     21

#elif defined(CAMERA_MODEL_M5STACK_WITHOUT_PSRAM)
  #define PWDN_GPIO_NUM     -1
  #define RESET_GPIO_NUM    15
  #define XCLK_GPIO_NUM     27
  #define SIOD_GPIO_NUM     25
  #define SIOC_GPIO_NUM     23
  
  #define Y9_GPIO_NUM       19
  #define Y8_GPIO_NUM       36
  #define Y7_GPIO_NUM       18
  #define Y6_GPIO_NUM       39
  #define Y5_GPIO_NUM        5
  #define Y4_GPIO_NUM       34
  #define Y3_GPIO_NUM       35
  #define Y2_GPIO_NUM       17
  #define VSYNC_GPIO_NUM    22
  #define HREF_GPIO_NUM     26
  #define PCLK_GPIO_NUM     21

#elif defined(CAMERA_MODEL_AI_THINKER)
  #define PWDN_GPIO_NUM     32
  #define RESET_GPIO_NUM    -1
  #define XCLK_GPIO_NUM      0
  #define SIOD_GPIO_NUM     26
  #define SIOC_GPIO_NUM     27
  
  #define Y9_GPIO_NUM       35
  #define Y8_GPIO_NUM       34
  #define Y7_GPIO_NUM       39
  #define Y6_GPIO_NUM       36
  #define Y5_GPIO_NUM       21
  #define Y4_GPIO_NUM       19
  #define Y3_GPIO_NUM       18
  #define Y2_GPIO_NUM        5
  #define VSYNC_GPIO_NUM    25
  #define HREF_GPIO_NUM     23
  #define PCLK_GPIO_NUM     22
#else
  #error "Camera model not selected"
#endif

static const char* _STREAM_CONTENT_TYPE = "multipart/x-mixed-replace;boundary=" PART_BOUNDARY;
static const char* _STREAM_BOUNDARY = "\r\n--" PART_BOUNDARY "\r\n";
static const char* _STREAM_PART = "Content-Type: image/jpeg\r\nContent-Length: %u\r\n\r\n";

httpd_handle_t stream_httpd = NULL;

static esp_err_t stream_handler(httpd_req_t *req){
  camera_fb_t * fb = NULL;
  esp_err_t res = ESP_OK;
  size_t _jpg_buf_len = 0;
  uint8_t * _jpg_buf = NULL;
  char * part_buf[64];

  res = httpd_resp_set_type(req, _STREAM_CONTENT_TYPE);
  if(res != ESP_OK){
    return res;
  }

  while(true){
    fb = esp_camera_fb_get();
    if (!fb) {
      Serial.println("Camera capture failed");
      res = ESP_FAIL;
    } else {
      if(fb->width > 400){
        if(fb->format != PIXFORMAT_JPEG){
          bool jpeg_converted = frame2jpg(fb, 80, &_jpg_buf, &_jpg_buf_len);
          esp_camera_fb_return(fb);
          fb = NULL;
          if(!jpeg_converted){
            Serial.println("JPEG compression failed");
            res = ESP_FAIL;
          }
        } else {
          _jpg_buf_len = fb->len;
          _jpg_buf = fb->buf;
        }
      }
    }
    if(res == ESP_OK){
      size_t hlen = snprintf((char *)part_buf, 64, _STREAM_PART, _jpg_buf_len);
      res = httpd_resp_send_chunk(req, (const char *)part_buf, hlen);
    }
    if(res == ESP_OK){
      res = httpd_resp_send_chunk(req, (const char *)_jpg_buf, _jpg_buf_len);
    }
    if(res == ESP_OK){
      res = httpd_resp_send_chunk(req, _STREAM_BOUNDARY, strlen(_STREAM_BOUNDARY));
    }
    if(fb){
      esp_camera_fb_return(fb);
      fb = NULL;
      _jpg_buf = NULL;
    } else if(_jpg_buf){
      free(_jpg_buf);
      _jpg_buf = NULL;
    }
    if(res != ESP_OK){
      break;
    }
    //Serial.printf("MJPG: %uB\n",(uint32_t)(_jpg_buf_len));
  }
  return res;
}

void startCameraServer(){
  httpd_config_t config = HTTPD_DEFAULT_CONFIG();
  config.server_port = 80;

  httpd_uri_t index_uri = {
    .uri       = "/",
    .method    = HTTP_GET,
    .handler   = stream_handler,
    .user_ctx  = NULL
  };
  
  //Serial.printf("Starting web server on port: '%d'\n", config.server_port);
  if (httpd_start(&stream_httpd, &config) == ESP_OK) {
    httpd_register_uri_handler(stream_httpd, &index_uri);
  }
}

void setup() {
  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector
 
  Serial.begin(115200);
  Serial.setDebugOutput(false);
  
  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_sscb_sda = SIOD_GPIO_NUM;
  config.pin_sscb_scl = SIOC_GPIO_NUM;
  config.pin_pwdn = PWDN_GPIO_NUM;
  config.pin_reset = RESET_GPIO_NUM;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG; 
  
  if(psramFound()){
    config.frame_size = FRAMESIZE_UXGA;
    config.jpeg_quality = 10;
    config.fb_count = 2;
  } else {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 12;
    config.fb_count = 1;
  }
  
  // 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;
  }
  // Wi-Fi connection
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  
  Serial.print("Camera Stream Ready! Go to: http://");
  Serial.print(WiFi.localIP());
  
  // Start streaming web server
  startCameraServer();
}

void loop() {
  delay(1);
}

在上傳程式碼前,您需要在下面變數中替換成您自己的網路憑證:

const char* ssid = "REPLACE_WITH_YOUR_SSID";
const char* password = "REPLACE_WITH_YOUR_PASSWORD";

然後,確保選擇正確的相機模組。在這種情況下,我們使用的是 AI-THINKER 模型。

如果您使用相同的相機模組,則無需更改程式碼上的任何內容。

#define CAMERA_MODEL_AI_THINKER

現在,您可以將程式碼上傳到您的 ESP32-CAM 開發板上。

3. 上傳程式碼

使用PL2303或CH340轉接線(我使用的是CH340轉接線),將 ESP32-CAM 板連接到您的計算機。按照下面的示意圖:

許多轉接線都有一個跳線,允許您選擇 3.3V 或 5V。確保跳線在正確的位置以選擇 5V。

ESP32-CAMCH340
GNDGND
5VVCC (5V)
U0RTX
U0TRX
GPIO 0GND

要上傳程式碼,請按照下面步驟操作:

1) 轉到工具>開發並選擇ESP32 Dev Module

2) 轉到工具>端口並選擇 ESP32 連接的 COM 端口。

3)然後,點擊上傳按鈕上傳程式碼。

4)當您在編程視窗上看到下面這些點及__時,如下圖所示,按下 ESP32-CAM 開發板的 RST 按鈕。

幾秒鐘後,程式碼應該成功上傳到您的開發板上。

獲取 IP 地址

上傳程式碼後,斷開連接通用輸入輸出pin的 0接地線. 以 115200 的鮑率打開序列埠監控視窗。按下 ESP32-CAM 開發板的RST按鈕。

ESP32 IP 地址應該會出現在監控視窗中。

訪問視訊串流服務器

現在,您可以訪問local端網路上的相機串流視訊服務器。打開瀏覽器並輸入 ESP32-CAM IP 地址。這樣就可以看到視訊串流的頁面。

IMG20220504150201

找一個子網域設定DNS給視訊IP

我這裏是之前有自己架設一台Nginx Server,我就設定一個子網域的網址給192.168.1.12,這樣就可以用手機上的瀏覽器觀看,這樣有一個好處就是出門在外,就可以隨時觀看串流視訊。如下圖示。

IMG20220504151239

總結

在本教程中,我們向您展示了如何使用 ESP32-CAM 開發板建構一個簡單的視訊串流網路服務器來建構 IP 攝影機。我們建構的 Web 服務器可以輕鬆地使用手機上的瀏覽器,在任何地方就觀看攝影機。

參考文章:https://randomnerdtutorials.com/esp32-cam-video-streaming-web-server-camera-home-assistant/

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