CameraFaceRecognitionDoorLock.ino

#include "esp_camera.h"   //the esp32 camera libraries are linked here
#include <WiFi.h>     //the libraries for WiFi are linked heer

//
// WARNING!!! Make sure that you have either selected ESP32 Wrover Module,
//            or another board which has PSRAM enabled
//

// Select camera model
//#define CAMERA_MODEL_WROVER_KIT
//#define CAMERA_MODEL_ESP_EYE
//#define CAMERA_MODEL_M5STACK_PSRAM
//#define CAMERA_MODEL_M5STACK_WIDE
#define CAMERA_MODEL_AI_THINKER     //select which esp32 camera module you are using
#define Relay 2      //declare pin for each component
#define Red 13
#define Green 12
#include "camera_pins.h"

//enter WiFi details for the camera
const char* ssid = ""; //Wifi Name SSID
const char* password = ""; //WIFI Password

void startCameraServer();

boolean matchFace = false;    //declare the default values to be considered
boolean activateRelay = false;
long prevMillis=0;
int interval = 10000;

void setup() 
{
  pinMode(Relay,OUTPUT);
  pinMode(Red,OUTPUT);
  pinMode(Green,OUTPUT);
  digitalWrite(Relay,LOW);
  digitalWrite(Red,HIGH);
  digitalWrite(Green,LOW);
  
  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.pixel_format = PIXFORMAT_JPEG;
  //init with high specs to pre-allocate larger buffers
  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;
  }

#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 blightness just a bit
    s->set_saturation(s, -2);//lower the saturation
  }
  //drop down frame size for higher initial frame rate
  s->set_framesize(s, FRAMESIZE_QVGA);

#if defined(CAMERA_MODEL_M5STACK_WIDE)
  s->set_vflip(s, 1);
  s->set_hmirror(s, 1);
#endif

  WiFi.begin(ssid, password);
  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() 
{
  if(matchFace==true && activateRelay==false)   //here in this function if the user's face is matched in the system it will turn on the relay
  {
    activateRelay=true;
    digitalWrite(Relay,LOW);
    digitalWrite(Green,HIGH);
    digitalWrite(Red,LOW);
    prevMillis=millis();
    Serial.print("Door Unlocked \n");   //this message will be diaplayed when the relay is turned on and the door is unlocked
  }
  if(activateRelay == true && millis()-prevMillis > interval)   //here in this function after the delay time is completed the system will turn of the relay
  {
    activateRelay=false;
    matchFace=false;
    digitalWrite(Relay,HIGH);
    digitalWrite(Green,LOW);
    digitalWrite(Red,HIGH);
    Serial.print("Door Locked \n");     //this message will be diaplayed when thedelay time of the relay is over
  }
}