Intelligent access control based on ESP32 and LCD

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Brief Introduction

The smart home is becoming more and more common with the development of technology, this article will focus on the security aspects of the intelligent access control project.

This article uses STONE's touch screen to send commands to the MCU to control the relay and MFRC522 module.

The principle of card reading: by driving the RFID-RC522 module, identify the ID card ID close to the ID card and then determine whether the ID exists in the database of the word typical, ID is the typical value of the word, if the existence of the verification through, and then print out the corresponding name, and then drive the electromagnetic lock in the same way.

Required materials

  • ESP32

  • KOB electronic lock

  • Relay

  • STONE STWI070WT-01 touch panel display

  • MFRC522 module

Realized function

  1. card registration.

  2. username and password registration.

  3. card swipe to unlock the electronic lock.

  4. User name and password to unlock the electronic lock.

Connection diagram

connection
connection1920×991 157 KB

GUI design

GUI design
GUI design1600×868 169 KB

Video demo

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I programmed in python and I'm now using the Arduino IDE to program in C. I will upload the code once I have changed it.

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I have now finished the intelligent access control system with Arduino and I am updating it here.

#include <SPI.h>
#include <MFRC522.h>
//#include <ArduinoJson.h>
//#include <SoftwareSerial.h>
 
#define SS_PIN 10
#define RST_PIN 9

#define clocks 7
 
MFRC522 rfid(SS_PIN, RST_PIN);
 

byte nuidPICC[4];
byte nuidPICC2[4];
unsigned char RX1_BUF[50];

unsigned char RX3_BUF[10];

uint8_t count_i=0;
uint8_t tag=0;

int idsnum = 4;

//uint32_t nuidPICC2=0;

//int numwei = 32;
//unsigned char names[100]={'a',"lbw"};
//unsigned char names[100]={"zbw","lbw"};
//unsigned char *cnames=names[0];
unsigned char names[30][10] = {"zbw",0};
unsigned char names2[30][10] = {"zbw",0};
unsigned char ids[50]={0x13,0xA5,0x5D,0x04};
unsigned char password1[30][20]={"zbw3366",0};
unsigned char admin[2][5]={"yyds",0};
int names_nums = 0;

void card_read();
void password_read();
void password_regit();
void printHex(byte *buffer, byte bufferSize);

void setup()
{
   Serial.begin(115200);
   SPI.begin();
  rfid.PCD_Init();
  pinMode(clocks, OUTPUT);

}

void loop(){

 while (Serial.available())
  {
    RX1_BUF[count_i]=Serial.read();
    Serial.println(RX1_BUF[count_i]);
    count_i++;
    }
    //memcpy(RX2_BUF,RX1_BUF,count_i);
    
    if ((RX1_BUF[3] == 16)&&(RX1_BUF[4] == 1))
  {
    Serial.println();
    Serial.println("button");
    for(tag=0;tag<RX1_BUF[6]-1;tag++)
        {
          RX3_BUF[tag]=RX1_BUF[tag+7];
        }
    }
    memset(RX1_BUF,0,count_i);
    

    if(((strcmp("card2",(const char *)RX3_BUF))==0)){
    memset(RX3_BUF,0,count_i);
    count_i=0;
    card_read((const char*)*names2, 100, 10);
    }
    else if(((strcmp("password2",(const char *)RX3_BUF))==0)){
    memset(RX3_BUF,0,count_i);
    count_i=0;
    Serial.println(count_i);
    password_read((const char*)*names, 100, 10, (const char*)*password1, 100, 20);
    }
    else if(((strcmp("password1",(const char *)RX3_BUF))==0)){
    memset(RX3_BUF,0,count_i);
    count_i=0;
    Serial.println(count_i);
    password_regit((const char*)*admin, 2, 2, *names);
    }
    else if(((strcmp("card1",(const char *)RX3_BUF))==0)){
    memset(RX3_BUF,0,count_i);
    count_i=0;
    Serial.println(count_i);
    card_regit((const char*)*admin, 2, 2);
    }
    count_i=0;
}

void card_read(char *namess, int n, int m){
  Serial.println("card_read");
  count_i=0;

  while(1){

    while (Serial.available())
  {
    RX1_BUF[count_i]=Serial.read();
    Serial.println(RX1_BUF[count_i]);
    count_i++;
    }
    if ((RX1_BUF[3] == 16)&&(RX1_BUF[4] == 1))
  {
    Serial.println();
    Serial.println("button");
    for(tag=0;tag<RX1_BUF[6]-1;tag++)
        {
          RX3_BUF[tag]=RX1_BUF[tag+7];
        }
    }
    memset(RX1_BUF,0,count_i);
    count_i=0;

    if(((strcmp("back3",(const char *)RX3_BUF))==0)){
    Serial.println("back_home");
    return;
    }

  
  if ( ! rfid.PICC_IsNewCardPresent())
    continue;
 
  
  if ( ! rfid.PICC_ReadCardSerial())
    continue;
 
  MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);
 
  
  if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI &&  
    piccType != MFRC522::PICC_TYPE_MIFARE_1K &&
    piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
    Serial.println("not support");
    continue;
  }
  
  
  for (byte i = 0,nuidPICC2 = 0,numwei = 32; i < 4; i++) {
    //Serial.println(rfid.uid.uidByte[i]);
    nuidPICC[i] = rfid.uid.uidByte[i];
    Serial.println(nuidPICC[i],HEX);
    //nuidPICC2 = rfid.uid.uidByte[i];
    //nuidPICC2 = nuidPICC2 << (numwei-8);
  } 

  Serial.println();

  Serial.println(&(*(namess+1*10)));

  
  rfid.PICC_HaltA();
 
  
  rfid.PCD_StopCrypto1();
  for (int id_num = 0;id_num < 100; id_num++){
  if ((nuidPICC[0] == ids[id_num])&&(nuidPICC[1] == ids[id_num+1])&&(nuidPICC[2] == ids[id_num+2])&&(nuidPICC[3] == ids[id_num+3]))
  {
    //cnames = names[id_num];
    if(((strcmp("",&(*(namess+(id_num/4)*10))))==0))break;
    //if(&(*(namess+(id_num/4)*10)) == "")break;
    Serial.print(id_num);
    Serial.print("UID：");
    Serial.print(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"label\",\"widget\":\"cardname1\",\"text\":\""));
    //for(int id_nums = 0;id_nums < 10;id_nums++)
    //{
   // Serial.print(&(*(namess + id_num + id_nums - 1)));
    //Serial.print(&(*(namess + id_num + id_nums - 1)));
    //}
    Serial.print(&(*(namess + (id_num/4)*10 )));
    Serial.print(F("\"}>ET"));
    printHex(rfid.uid.uidByte, rfid.uid.size);
    digitalWrite(clocks, HIGH);
    Serial.println(F("ST<{\"cmd_code\":\"set_visible\",\"type\":\"widget\",\"widget\":\"gif4\",\"visible\":true}>ET"));
    delay(3000);
    digitalWrite(clocks, LOW);
    Serial.println(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"label\",\"widget\":\"cardid1\",\"text\":\"\"}>ET"));
    Serial.println(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"label\",\"widget\":\"cardname1\",\"text\":\"\"}>ET"));
    Serial.println(F("ST<{\"cmd_code\":\"set_visible\",\"type\":\"widget\",\"widget\":\"gif4\",\"visible\":false}>ET"));
    //nuidPICC2 = 0;
    break;
  }
  //nuidPICC2 = 0;
  }
}
}

void printHex(byte *buffer, byte bufferSize) {
  Serial.println();
  Serial.print(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"label\",\"widget\":\"cardid1\",\"text\":\""));
  for (byte i = 0; i < bufferSize; i++) {
    Serial.print(buffer[i] < 0x10 ? "0" : "");
    Serial.print(buffer[i], HEX);
  }
  Serial.print(F("\"}>ET"));
}

void password_read(char *namess, int n, int m, char *passwords, int o, int p){
  
//  unsigned char RX4_BUF[10] = {0};
  unsigned char RX5_BUF[20] = {0};
//  unsigned char RX6_BUF[20] = {0};
  int name_true = 0;
  int password_true = 0;
  int i, j;
  int name_s = 0;
  Serial.println("password_read");
  

  while(1){

    while (Serial.available())
  {
    RX1_BUF[count_i]=Serial.read();
    Serial.println(RX1_BUF[count_i]);
    count_i++;
    }
    if ((RX1_BUF[3] == 16)&&(RX1_BUF[4] == 1))
  {
    Serial.println();
    Serial.println("button");
    for(tag=0;tag<RX1_BUF[6]-1;tag++)
        {
          RX3_BUF[tag]=RX1_BUF[tag+7];
        }
        RX3_BUF[tag] = NULL;
        RX3_BUF[tag+1] = NULL;
        RX3_BUF[tag+2] = NULL;
    //Serial.println(((const char *)RX3_BUF)); 
    }
    else if ((RX1_BUF[3] == 16)&&(RX1_BUF[4] == 112))
  {
    Serial.println();
    Serial.println("edit");
    for(name_s = 0; name_s < RX1_BUF[6]-8; name_s++)
    {
      RX5_BUF[name_s] = RX1_BUF[name_s+15];
    }
        RX5_BUF[name_s] = NULL;
        RX5_BUF[name_s+1] = NULL;
        RX5_BUF[name_s+2] = NULL;
    
        Serial.println(((const char *)RX5_BUF)); 
        if (RX1_BUF[12]==53){
    for (i=0;i<100;i++){
      for (j=0;j<10;j++){
        if (strcmp(&(*(namess + i*10 )),(const char*)RX5_BUF)==0)
        {name_true = 1;
        break;
        }
      }
      if(name_true == 1)break;
    }
        }

        else if (RX1_BUF[12]==54){
          for (;i<100;i++){
      for (j=0;j<20;j++){
        if (strcmp(&(*(passwords + i*20 )),(const char*)RX5_BUF)==0)
        {password_true = 1;
        break;
        }
      }
      if(name_true == 1)break;
    }
        }
    Serial.println(name_true);
    Serial.println(password_true);
    Serial.println(&(*(namess + 1*10 )));
    Serial.println(&(*(passwords + 1*20 )));
    if ((name_true == 1)&&(password_true == 1)){
    digitalWrite(clocks, HIGH);
    Serial.println(F("ST<{\"cmd_code\":\"set_visible\",\"type\":\"widget\",\"widget\":\"lock2\",\"visible\":true}>ET"));
    delay(3000);
    digitalWrite(clocks, LOW);
    Serial.println(F("ST<{\"cmd_code\":\"set_visible\",\"type\":\"widget\",\"widget\":\"lock2\",\"visible\":false}>ET"));
    Serial.println(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"edit\",\"widget\":\"edit5\",\"text\":\"\"}>ET"));
    Serial.println(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"edit\",\"widget\":\"edit6\",\"text\":\"\"}>ET"));
    name_true = password_true = 0;
    }
    }
    memset(RX1_BUF,0,count_i);
    count_i=0;

    if(((strcmp("back4",(const char *)RX3_BUF))==0)){
    Serial.println("back_home");
    return;


void password_regit(char *admins, int w, int e,char *namess){

  unsigned char RX6_BUF[20] = {0};
  unsigned char rname_BUF[10] = {0};
  unsigned char rpass_BUF[20] = {0};
//  unsigned char RX6_BUF[20] = {0};
  int name1_true = 0;
  int password1_true = 0;
  int admin1_true = 0;
  int name_s;
  //int n, p;
  Serial.println("password_regit");
  

  while(1){

    while (Serial.available())
  {
    RX1_BUF[count_i]=Serial.read();
    Serial.println(RX1_BUF[count_i]);
    count_i++;
    }
    if ((RX1_BUF[3] == 16)&&(RX1_BUF[4] == 1))
  {
    Serial.println();
    Serial.println("button");
    for(tag=0;tag<RX1_BUF[6]-1;tag++)
        {
          RX3_BUF[tag]=RX1_BUF[tag+7];
        }
        RX3_BUF[tag] = NULL;
        RX3_BUF[tag+1] = NULL;
        RX3_BUF[tag+2] = NULL;
    }
    else if ((RX1_BUF[3] == 16)&&(RX1_BUF[4] == 112))
  {
    Serial.println();
    Serial.println("edit");
    for(name_s = 0; name_s < RX1_BUF[6]-8; name_s++)
    {
      RX6_BUF[name_s] = RX1_BUF[name_s+15];
    }
    
        Serial.println(((const char *)RX6_BUF)); 
        if (RX1_BUF[12]==51)
        {
          memcpy(rname_BUF,RX6_BUF,name_s);
          name1_true = 1;
          rname_BUF[name_s] = NULL;
          rname_BUF[name_s+1] = NULL;
          rname_BUF[name_s+2] = NULL;
        }
        else if (RX1_BUF[12]==52)
        {
          memcpy(rpass_BUF,RX6_BUF,name_s);
          password1_true = 1;
          rpass_BUF[name_s] = NULL;
          rpass_BUF[name_s+1] = NULL;
          rpass_BUF[name_s+2] = NULL;
        }
        else if (RX1_BUF[12]==55)
        {
          if (strcmp(&(*(admins)),(const char*)RX6_BUF)==0)
          admin1_true = 1;
        }
        
        Serial.println(name1_true);
        Serial.println(password1_true);
        Serial.println(admin1_true);
//        Serial.println(&(*(admins)));
        Serial.println((const char*)rname_BUF);
        Serial.println((const char*)rpass_BUF);

        if ((name1_true == 1)&&(password1_true == 1)&&(admin1_true == 1))
        {
          names_nums++;

          strncpy(&(names[names_nums][0]), &rname_BUF[0], strlen(rname_BUF));
          strncpy(&(password1[names_nums][0]), &rpass_BUF[0], strlen(rpass_BUF));

          name1_true = password1_true = admin1_true = 0;
        }

    
  
}
    memset(RX1_BUF,0,count_i);
    count_i=0;
    if(((strcmp("back2",(const char *)RX3_BUF))==0)){
    Serial.println("back_home");
    return;
  }
}
}

void card_regit(char *admins, int w, int e){

  unsigned char RX7_BUF[20] = {0};
  unsigned char rname_BUF[10] = {0};
  unsigned char rpass_BUF[20] = {0};
  int name1_true = 0;
  int password1_true = 0;
  int admin1_true = 0;
  int name_s;
  int set_label = 0;
  Serial.println("card_regit");
  

  while(1){

    while (Serial.available())
  {
    RX1_BUF[count_i]=Serial.read();
    Serial.println(RX1_BUF[count_i]);
    count_i++;
    }
    if ((RX1_BUF[3] == 16)&&(RX1_BUF[4] == 1))
  {
    Serial.println();
    Serial.println("button");
    for(tag=0;tag<RX1_BUF[6]-1;tag++)
        {
          RX3_BUF[tag]=RX1_BUF[tag+7];
        }
        RX3_BUF[tag] = NULL;
        RX3_BUF[tag+1] = NULL;
        RX3_BUF[tag+2] = NULL;
    //Serial.println(((const char *)RX3_BUF)); 
    }
    else if ((RX1_BUF[3] == 16)&&(RX1_BUF[4] == 112))
  {
    Serial.println();
    Serial.println("edit");
    for(name_s = 0; name_s < RX1_BUF[6]-8; name_s++)
    {
      RX7_BUF[name_s] = RX1_BUF[name_s+15];
    }
    
        Serial.println(((const char *)RX7_BUF)); 
        if (RX1_BUF[12]==49)
        {
          memcpy(rname_BUF,RX7_BUF,name_s);
          name1_true = 1;
          rname_BUF[name_s] = NULL;
          rname_BUF[name_s+1] = NULL;
          rname_BUF[name_s+2] = NULL;
        }
        else if (RX1_BUF[12]==50)
        {
          if (strcmp(&(*(admins)),(const char*)RX7_BUF)==0)
          admin1_true = 1;
        }
        
        Serial.println(name1_true);
        Serial.println(admin1_true);
        Serial.println(&(*(admins)));

        

    
  
}

    memset(RX1_BUF,0,count_i);
    count_i=0;
    if(((strcmp("back1",(const char *)RX3_BUF))==0)){
    Serial.println("back_home");
    return;
  }
if ((name1_true == 1)&&(admin1_true == 1))
        {
          
          if (set_label == 0)Serial.println(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"label\",\"widget\":\"cardid\",\"text\":\"please place card!\"}>ET"));
          set_label = 1;
          if ( ! rfid.PICC_IsNewCardPresent())
    continue;
 
  
  if ( ! rfid.PICC_ReadCardSerial())
    continue;
 
  MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);
 
  
  if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI &&  
    piccType != MFRC522::PICC_TYPE_MIFARE_1K &&
    piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
    Serial.println("not support");
    continue;
  }
  
  
  for (byte i = 0,nuidPICC2 = 0,numwei = 32; i < 4; i++,idsnum++) {
    nuidPICC[i] = rfid.uid.uidByte[i];
    ids[idsnum] = nuidPICC[i];
    Serial.println(ids[idsnum],HEX);
  }
  strncpy(&(names2[1][0]), &rname_BUF[0], strlen(rname_BUF)); 
  Serial.println(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"label\",\"widget\":\"cardid\",\"text\":\"regit ok!\"}>ET"));
  delay(2000);
  Serial.println(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"label\",\"widget\":\"cardid\",\"text\":\"\"}>ET"));
  Serial.println(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"edit\",\"widget\":\"edit1\",\"text\":\"\"}>ET"));
    Serial.println(F("ST<{\"cmd_code\":\"set_text\",\"type\":\"edit\",\"widget\":\"edit2\",\"text\":\"\"}>ET"));
  
  
  rfid.PICC_HaltA();
  rfid.PCD_StopCrypto1();

        }

    
}
}
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