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#define CAM_PIN_PWDN    -1 //power down is not used
#define CAM_PIN_RESET   15 
#define CAM_PIN_XCLK    27
#define CAM_PIN_SIOD    25
#define CAM_PIN_SIOC    23

#define CAM_PIN_D7      19
#define CAM_PIN_D6      36
#define CAM_PIN_D5      18
#define CAM_PIN_D4      39
#define CAM_PIN_D3       5
#define CAM_PIN_D2      34
#define CAM_PIN_D1      35
#define CAM_PIN_D0      17
#define CAM_PIN_VSYNC   22
#define CAM_PIN_HREF    26
#define CAM_PIN_PCLK    21

#include "esp_camera.h"

#define CAM_PIN_PWDN    -1 //power down is not used
#define CAM_PIN_RESET   15 //software reset will be performed
#define CAM_PIN_XCLK    27
#define CAM_PIN_SIOC    23
#define CAM_PIN_SIOD    25

#define CAM_PIN_HREF    26
#define CAM_PIN_PCLK    21

#define CAM_PIN_D7      19
#define CAM_PIN_D6      36
#define CAM_PIN_D5      18
#define CAM_PIN_D4      39
#define CAM_PIN_D3      5
#define CAM_PIN_D2      34
#define CAM_PIN_D1      35
#define CAM_PIN_D0      17

#define CAM_XCLK_FREQ   10000000
#define CAMERA_LED_GPIO 16
#define CAM_PIN_VSYNC   22

void setup() {
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println();

  static camera_config_t config = {
    .pin_pwdn  = CAM_PIN_PWDN,
    .pin_reset = CAM_PIN_RESET,
    .pin_xclk = CAM_PIN_XCLK,
    .pin_sscb_sda = CAM_PIN_SIOD,
    .pin_sscb_scl = CAM_PIN_SIOC,

    .pin_d7 = CAM_PIN_D7,
    .pin_d6 = CAM_PIN_D6,
    .pin_d5 = CAM_PIN_D5,
    .pin_d4 = CAM_PIN_D4,
    .pin_d3 = CAM_PIN_D3,
    .pin_d2 = CAM_PIN_D2,
    .pin_d1 = CAM_PIN_D1,
    .pin_d0 = CAM_PIN_D0,
    .pin_vsync = CAM_PIN_VSYNC,
    .pin_href = CAM_PIN_HREF,
    .pin_pclk = CAM_PIN_PCLK,

    //XCLK 20MHz or 10MHz for OV2640 double FPS (Experimental)
    // .xclk_freq_hz = 20000000,
    .xclk_freq_hz = CAM_XCLK_FREQ,    
    .ledc_timer = LEDC_TIMER_0,
    .ledc_channel = LEDC_CHANNEL_0,

    .pixel_format = PIXFORMAT_JPEG,//YUV422,GRAYSCALE,RGB565,JPEG
    .frame_size = FRAMESIZE_VGA,//QQVGA-QXGA Do not use sizes above QVGA when not JPEG

    .jpeg_quality = 10, //0-63 lower number means higher quality
    .fb_count = 2 //if more than one, i2s runs in continuous mode. Use only with JPEG
};

  // 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;
  }

  //drop down frame size for higher initial frame rate
  sensor_t * s = esp_camera_sensor_get();
  s->set_framesize(s, FRAMESIZE_QVGA);  

  Serial.printf("Camera init completed !!");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10000);
}