写一个ESP32-cam触发拍照并将照片上传到FTP服务器的例子

好的，以下是ESP32-cam触发拍照并将照片上传到FTP服务器的例子代码：

#include "WiFi.h"
#include "esp_camera.h"
#include <WiFiClient.h>
#include <WiFiClientSecure.h>
#include <ESP_FTPClient.h>

// Replace with your network credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

// FTP server credentials
const char* ftp_server = "your_FTP_SERVER";
const char* ftp_user = "your_FTP_USERNAME";
const char* ftp_password = "your_FTP_PASSWORD";

// Pin definition for 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

void setup() {
  Serial.begin(115200);
  
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  
  // Initialize camera
  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;
  }
  
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }
  
  // Take picture and upload to FTP server
  camera_fb_t * fb = NULL;
  fb = esp_camera_fb_get();
  if (!fb) {
    Serial.println("Failed to capture image");
    return;
  }
  
  FTPClient ftp;
  if (ftp.connect(ftp_server, ftp_user, ftp_password)) {
    Serial.println("Connected to FTP server");
    if (ftp.put(fb->buf, fb->len, "picture.jpg", "pictures")) {
      Serial.println("Picture uploaded successfully");
    } else {
      Serial.println("Failed to upload picture");
    }
    ftp.quit();
  } else {
    Serial.println("Failed to connect to FTP server");
  }
  
  esp_camera_fb_return(fb);
}

void loop() {
  
}

这个例子中，我们首先连接到Wi-Fi网络，然后初始化ESP32-cam相机。接着，我们采集一张图片，并将其上传到FTP服务器上。你需要将其中的`your_SSID`、`your_PASSWORD`、`your_FTP_SERVER`、`your_FTP_USERNAME`和`your_FTP_PASSWORD`替换为你自己的网络和FTP服务器凭据。同时，你还需要安装ESP_FTPClient库。