ESP32 CAM OV2640

 

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

const char* ssid     = "TonyMagic6";
const char* password = "12345678";

#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

#include "esp_http_server.h"

esp_err_t jpg_stream_httpd_handler(httpd_req_t *req){
  camera_fb_t * fb = NULL;
  esp_err_t res = ESP_OK;
  size_t _jpg_buf_len;
  uint8_t * _jpg_buf;
  static uint64_t last_frame = 0;

  if(!last_frame) last_frame = esp_timer_get_time();

  fb = esp_camera_fb_get();
  if (!fb) {
    httpd_resp_send_500(req);
    return ESP_FAIL;
  }

  _jpg_buf = fb->buf;
  _jpg_buf_len = fb->len;

  httpd_resp_set_type(req, "image/jpeg");
  httpd_resp_set_hdr(req, "Content-Disposition", "inline; filename=capture.jpg");
  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");

  res = httpd_resp_send(req, (const char *)_jpg_buf, _jpg_buf_len);
  esp_camera_fb_return(fb);

  last_frame = esp_timer_get_time();
  return res;
}

httpd_uri_t uri_get = {
  .uri      = "/",
  .method   = HTTP_GET,
  .handler  = jpg_stream_httpd_handler,
  .user_ctx = NULL
};

httpd_handle_t start_webserver(void) {
  httpd_handle_t server = NULL;
  httpd_config_t config = HTTPD_DEFAULT_CONFIG();
  if (httpd_start(&server, &config) == ESP_OK) {
    httpd_register_uri_handler(server, &uri_get);
  }
  return server;
}

void setup() {
  Serial.begin(115200);

  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.pixel_format = PIXFORMAT_JPEG;
  config.frame_size = FRAMESIZE_QVGA;
  config.jpeg_quality = 10;
  config.fb_count = 1;

  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed 0x%x", err);
    return;
  }

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); }
  Serial.println("\nWiFi OK");
  Serial.print("IP: "); Serial.println(WiFi.localIP());

  start_webserver();
}

void loop() { delay(10000); }