ESP32Cam transmite imágenes al protocolo TCP del servidor

código esp32cam

#include "esp_camera.h"
#include <WiFi.h>

#define CAMERA_MODEL_AI_THINKER // Has PSRAM

#include "camera_pins.h"

char* ssid = "xxx";           //wifi名
char* password = "xxxxxxxxx";  //wifi密码
char* ip = "xxx.xxx.xxx.xx"; //服务器ip地址
uint16_t port = 90;         //服务器端口

WiFiClient client;  
camera_fb_t* fb;
// StaticJsonDocument<1024*8> jsonBuffer; 

uint32_t len = 0;
char* data;
void dataCopy(uint8_t* dest, uint8_t* src, size_t len);

void setup() {

  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println();

  WiFi.begin(ssid, password);
  Serial.print("WiFi connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  };
  Serial.println();
  Serial.println("WiFi connected");

 
  Serial.print("Client connecting");
  while(!client.connect(ip, port)){
    delay(500);
    Serial.print(".");
  };
  Serial.println();
  Serial.println("Client connected");


  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 PSRAM IC present, init with UXGA resolution and higher JPEG quality
  //                      for larger pre-allocated frame buffer.
  if(psramFound()){
    config.frame_size = FRAMESIZE_UXGA;
    config.jpeg_quality = 1;
    config.fb_count = 2;
    Serial.println("psramFound");
  } else {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 50;
    config.fb_count = 1;
    Serial.println("psramNotFound");
  }

#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
  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
}

void loop() {
  //1.获取摄像头摄取的图片数据
  fb = esp_camera_fb_get();   
  //2.图片数据大小格式化                
  uint32_t len = (uint32_t)fb->len;
  //3.先发送图片数据大小
  client.write((uint8_t *)&len, sizeof(len));
  Serial.println(len);
  //4.发送图片数据
  client.write((uint8_t*)fb->buf, len);
  //5.释放数据指针
  esp_camera_fb_return(fb);
}

código de servidor

// server.js
const net = require('net')
const { Buffer } = require('node:buffer');
const { writeFile } =require('node:fs')

const server = net.createServer()

// 存储未处理的不完整的数据包
let dataBuffer = Buffer.alloc(0);

server.listen('8080', ()=>{console.log('开始监听')})

server.on('connection', socket => {
  console.log('新用户连接')

  socket.on('data', chunk => {
    dataBuffer = Buffer.concat([dataBuffer, chunk])
    while(dataBuffer.length > 4){
        var len = dataBuffer.readUInt32LE()

        if(dataBuffer.length < len + 4) break;
        console.log(len)

        writeFile('./image/img.jpg', dataBuffer.slice(4, len + 4), (err) => {
          if (err) throw err;
          console.log('The file has been saved!');
        });
        dataBuffer = dataBuffer.subarray(len + 4)
    }
  })
})

server.on('close',()=>{
  console.log('client disconnection')
})

process.on('uncaughtException',(error)=>{
  console.log('error:' + error)
})

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