esp32c3摄像头ov5640拍照程序

以下是ESP32-C3与OV5640摄像头的拍照程序示例：

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

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

// Set web server port number to 80
WiFiServer server(80);

// Initialize the camera
void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("WiFi connected successfully");
  
  // Start the 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;
  }

  // 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;
  }

  // Start the web server
  server.begin();
}

void loop() {
  WiFiClient client = server.available();
  if (client) {
    Serial.println("New client connected");
    String currentLine = "";
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        if (c == '\n') {
          if (currentLine.length() == 0) {
            // Send the HTTP response header
            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: image/jpeg");
            client.println("Connection: close");
            client.println();
            // Capture a photo and send it to the client
            camera_fb_t * fb = esp_camera_fb_get();
            if (!fb) {
              Serial.println("Camera capture failed");
              return;
            }
            client.write(fb->buf, fb->len);
            esp_camera_fb_return(fb);
            break;
          } else {
            currentLine = "";
          }
        } else if (c != '\r') {
          currentLine += c;
        }
      }
    }
    client.stop();
    Serial.println("Client disconnected");
  }
}

在这个示例中，我们使用了ESP32-C3的内置Wi-Fi模块来启动一个Web服务器，并在其中添加一个路由来捕获客户端对摄像头的请求。当服务器收到请求时，它会调用 `esp_camera_fb_get()` 函数来捕获图像帧，然后将其作为HTTP响应发送给客户端。请注意，我们使用了JPEG格式来编码图像，这可以通过 `camera_config_t` 结构中的 `PIXFORMAT_JPEG` 和 `config.jpeg_quality` 来配置。

当然，这只是一个简单的示例程序。如果您需要更高级的功能，例如图像处理或视频流传输，那么您需要编写更复杂的代码。但是，这个例子应该足以帮助您开始使用ESP32-C3和OV5640摄像头进行基本的图像捕获。