ESP32-CAM Video Streaming and Face Recognition with Arduino IDE

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

//
// WARNING!!! PSRAM IC required for UXGA resolution and high JPEG quality
// Ensure ESP32 Wrover Module or other board with PSRAM is selected
// Partial images will be transmitted if image exceeds buffer size
//
// You must select a partition scheme from the board menu that has at least 3MB of APP space.
// Face Recognition is DISABLED for ESP32 and ESP32-S2, because it takes up from 15 
// seconds to process a single frame. Face Detection is ENABLED if PSRAM is enabled as well

// ===================
// Select camera model
// ===================
//#define CAMERA_MODEL_WROVER_KIT // Has PSRAM
//#define CAMERA_MODEL_ESP_EYE // Has PSRAM
//#define CAMERA_MODEL_ESP32S3_EYE // Has PSRAM
//#define CAMERA_MODEL_M5STACK_PSRAM // Has PSRAM
//#define CAMERA_MODEL_M5STACK_V2_PSRAM // M5Camera version B Has PSRAM
//#define CAMERA_MODEL_M5STACK_WIDE // Has PSRAM
//#define CAMERA_MODEL_M5STACK_ESP32CAM // No PSRAM
//#define CAMERA_MODEL_M5STACK_UNITCAM // No PSRAM
#define CAMERA_MODEL_AI_THINKER // Has PSRAM
//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM
//#define CAMERA_MODEL_XIAO_ESP32S3 // Has PSRAM
// ** Espressif Internal Boards **
//#define CAMERA_MODEL_ESP32_CAM_BOARD
//#define CAMERA_MODEL_ESP32S2_CAM_BOARD
//#define CAMERA_MODEL_ESP32S3_CAM_LCD

#include "camera_pins.h"

// ===========================
// Enter your WiFi credentials
// ===========================
const char* ssid = "Caferobot-2G";
const char* password = "caferobot.ir";

void startCameraServer();
void setupLedFlash(int pin);

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

 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.frame_size = FRAMESIZE_UXGA;
 config.pixel_format = PIXFORMAT_JPEG; // for streaming
 //config.pixel_format = PIXFORMAT_RGB565; // for face detection/recognition
 config.grab_mode = CAMERA_GRAB_WHEN_EMPTY;
 config.fb_location = CAMERA_FB_IN_PSRAM;
 config.jpeg_quality = 12;
 config.fb_count = 1;
 
 // if PSRAM IC is present, init with UXGA resolution and higher JPEG quality
 // for larger pre-allocated frame buffer.
 if(config.pixel_format == PIXFORMAT_JPEG){
 if(psramFound()){
 config.jpeg_quality = 10;
 config.fb_count = 2;
 config.grab_mode = CAMERA_GRAB_LATEST;
 } else {
 // Limit the frame size when PSRAM is not available
 config.frame_size = FRAMESIZE_SVGA;
 config.fb_location = CAMERA_FB_IN_DRAM;
 }
 } else {
 // Best option for face detection/recognition
 config.frame_size = FRAMESIZE_240X240;
#if CONFIG_IDF_TARGET_ESP32S3
 config.fb_count = 2;
#endif
 }

#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
 if(config.pixel_format == PIXFORMAT_JPEG){
 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

#if defined(CAMERA_MODEL_ESP32S3_EYE)
 s->set_vflip(s, 1);
#endif

// Setup LED FLash if LED pin is defined in camera_pins.h
#if defined(LED_GPIO_NUM)
 setupLedFlash(LED_GPIO_NUM);
#endif

 WiFi.begin(ssid, password);
 WiFi.setSleep(false);

 while (WiFi.status() != WL_CONNECTED) {
 delay(500);
 Serial.print(".");
 }
 Serial.println("");
 Serial.println("WiFi connected");

 startCameraServer();

 Serial.print("Camera Ready! Use 'http://");
 Serial.print(WiFi.localIP());
 Serial.println("' to connect");
}

void loop() {
 // Do nothing. Everything is done in another task by the web server
 delay(10000);
}