STM32 project design: smart door lock PCB and source code based on stm32f1 (4 unlocking methods)

Project video
Bleep bleep video link ：https://www.bilibili.com/video/BV1fL41177HZ/
Project information
stm32f1 Free information link of smart door lock ：
link ：https://pan.baidu.com/s/1_au_QM2-59dMhIj4_lP2vQ
Extraction code ：wa4y

stm32f1 Complete information link of smart door lock ：
V1.1:https://download.csdn.net/download/mbs520/60273691
V1.2:https://download.csdn.net/download/mbs520/80301067
Suggestion plus QQ Access to resources 8 fold ：2809786963

Physical purchase link ：https://market.m.taobao.com/app/idleFish-F2e/widle-taobao-rax/page-detail?wh_weex=true&wx_navbar_transparent=true&id=662981777123&ut_sk=1.YS8KcP50tCcDANBMdqHJmYUj_21407387_1639226039728.copy.detail.662981777123.2054314811&forceFlush=1

Preface

1、 Because many students feedback now STM32F4 Expensive , The production cost is too high , So I spent nearly a month of my free time to study how to make a car with the lowest cost F4 The smart door lock has the same or more functions
STM32F4 Version smart door lock blog link ：https://blog.csdn.net/mbs520/article/details/106987758

One 、 Project brief introduction

（ One ） Function Overview

F4 edition ：
1、 The fingerprint information of family members can be added, deleted, checked and modified through the fingerprint module , The information about whether the addition, deletion and modification are successful is displayed in OLED On the screen
2、 In the process of fingerprint matching , If the collected fingerprint matches the fingerprint module library ,OLED Show that the match is successful , And rotate the stepper motor for one turn
3、 The smart door lock password can be set by pressing the key , The password can be set to two （ The password has six digits ）, If one of the two matches succeeds , You can unlock , You can also change the password by pressing the key , All operating procedures are shown in OLED in
4、 Realization RFID Unlock with mobile phone （ Bluetooth unlock ）
5、 Expand ： Virtual password unlock （ Virtual password ： Own Baidu ）
F1 Version added ：
1、 Can be entered 10 Cards
2、 Unlock and turn the stepping motor clockwise for one turn , Lock counterclockwise
3、 New buzzer prompt
4、 New unlock error prompt

（ Two ） The main technologies used in the project

F4 edition ：
1、IIC agreement 、SPI agreement 、 Serial protocol
2、 external flash drive 、SD Card drive
3、FTAFS file system
4、RTC Real time clock
F1 edition ：
1、IIC agreement 、SPI agreement 、 Serial protocol
2、GUI Interface design , Chinese character display
3、RTC Real time clock

（ 3、 ... and ） Characteristics of the project

1、 Material selection is based on economy

 The most expensive material is the fingerprint module 40 element , Single chip computer only 10 element 

2、 Reduce unnecessary materials

 Like the outside FLASH,SD Card module , Single chip microcomputer crystal oscillator 

2、 Use PCB, Reject cumbersome wiring

 Easier to make , Learning is easier 

3、 Powerful

 Have ４ There are two ways to unlock 、 Chinese interface 、 There are modification and entry operations 、 There's a cell phone APP control 

4、 High utilization of material functions

 MCU pin (48pin) utilization ＞90％, Single chip memory (64K) utilization >70%

5、 The code is simple and convenient , Strong logic

Show_Str(12,13,128,12," Smart door lock system hzc123",12,0); // Show Chinese characters 、 Character one sentence 

Two 、 Material selection

1、 master control STM32F103C8T6 ( Compatible products are available CH32F103C8T6 Instead of )

2、 Stepper motor ( With drive module )
model ：28BYJ4+ULN2003

3、4X4 Matrix key

4、 Fingerprint module AS608（ Serial port control ）

5、0.96 " OLED display （IIC）
model ：7 The needle

6、RFID RC522 Rf module （ Bring a card ）
7、 DuPont line 、 Pin 、 resistance 、 capacitance 、 triode 、 Potentiometer, etc

3、 ... and 、 Schematic design

Adopt the simplest hardware circuit , Do more functions
（ The screenshot is blurry , Downloadable resource view ）

Four 、PCB Design

Use the cheapest two-layer version ,10cm*10cm Design

5、 ... and 、 Source design

The source code is F4 Version of smart door lock is transplanted from , Some incompatible functions have been modified and new functions have been added

void DisUnLock(void )
{
    
	OLED_Clear();
	Show_Str(20,10,128,24," Unlocking ...",24,0);	
	OLED_Refresh_Gram();// Update display 
	Walkmotor_ON();
	Show_Str(20,10,128,24," Unlocked ！",24,0);
	OLED_Refresh_Gram();// Update display 
	delay_ms(1500);
}

void DisLock(void )
{
    
	OLED_Clear();
	Show_Str(30,20,128,16," Locked ！",16,0);
	OLED_Refresh_Gram();// Update display 
	Walkmotor_OFF();
	Show_Str(30,20,128,16," Locked ！",16,0);
	OLED_Show_Font(56,48,0);// lock 
	OLED_Refresh_Gram();// Update display 
	delay_ms(1000);
}
 int main(void)
 {
    			
	u16 set=0;
	int key_num;
	int time1;
	int time2;		// Lock screen time 
	char arrow=0;  // Arrow seat 
	//SysHSI_Init();
	delay_init();	    	 // Delay function initialization  
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); // Set up NVIC Interrupt grouping 2:2 Bit preemption priority ,2 Bit response priority 
	uart_init(9600);	 // The serial port is initialized to 9600
	printf(" The serial port function is normal \r\n");
	Button4_4_Init();          // Initialize the hardware interface connected with the key 
	OLED_Init();    			// Display initialization 
	Walkmotor_Init();        // Stepper motor initialization 
	BEEP_Init();			// Buzzer initialization 
	usart2_init(usart2_baund);           // Initialize the fingerprint module 
	PS_StaGPIO_Init();
	OLED_Clear(); 
	 
	starting();// Boot information  logo
	RTC_Init();	  			//RTC initialization 
	SysPartInit();   // System parameter initialization  
 	while(1)
	{
    
// Lock screen interface 
MAIN:
			OLED_Clear(); 
			OLED_Show_Font(56,48,0);// Show lock icon 
			while(1)
			{
    
				time1++;Display_Data();// Time to show ： Every time 1000ms Update the display data once 
				
				if(DisFlag == 1)
				{
    
					DisFlag = 0;
					OLED_Fill(0,24,16,63,0);
					OLED_Refresh_Gram();// Update display 
				}
				
				if((time1%100)==1)
				{
    
					//MFRC522 Unlock 
						time1=0;
						MFRC522_Initializtion();			
						Error=MFRC522_lock();
						if(Error==0)
						{
    
							goto MENU;	
						}
						else 
						{
    
							OLED_Show_Font(56,48,0);// lock 
						}
						
						// Mobile phone Bluetooth unlock password 1
						Error=usart1_cherk((char*)sys.passwd1);         
						if(Error==0){
     
							OLED_Clear_NOupdate();
							Show_Str(12,13,128,20," Bluetooth password 1： correct ",12,0); 
							OLED_Refresh_Gram();// Update display 
							delay_ms(800);
							DisUnLock();
							goto MENU;	
						}
						// Mobile phone Bluetooth unlock password 2
						Error=usart1_cherk((char*)sys.passwd2);         
						if(Error==0){
    
							OLED_Clear_NOupdate();
							Show_Str(12,13,128,12," Bluetooth password 2： correct ",12,0); 
							OLED_Refresh_Gram();// Update display 
							delay_ms(800);
							DisUnLock();
							goto MENU;	
						}
				}
				// Fingerprint unlocking 
				if(PS_Sta)	 // testing PS_Sta state , If there is a finger press 
				{
    
						while(PS_Sta){
    
						Error=press_FR();// Fingerprinting 
						if(Error==0)
						{
    
							//DisUnLock();
							goto MENU;   // Skip to the unlock interface 
						}								
						else 
						{
    
							OLED_Show_Font(56,48,0);// lock 
						}
					}
				}
				// Password lock 
				key_num=Button4_4_Scan();	// Key scan 
				if(key_num!=-1)
				{
    
					Error=password();// Password unlocking function 
					if(Error==0)
					{
    
						goto MENU;	// Skip to the unlock interface 
					}
					else 
					{
    
						OLED_Show_Font(56,48,0);// lock 
					}
				}
				delay_ms(1);
				
			}
			/******************** main interface **************************/

MENU:
			OLED_Clear();
MENUNOCLR:
			OLED_Fill(0,0,20,48,0);
			// The home menu displays 
			if(arrow<3){
    
				Show_Str(5,arrow*16,128,16,"->",16,0);// Show arrows 
				set=0;}
			else {
    
				Show_Str(5,(arrow-3)*16,128,16,"->",16,0);
				set=3;}
			Show_Str(25,0,128,16,setup[set],16,0);
			Show_Str(25,16,128,16,setup[set+1],16,0);
			Show_Str(25,32,128,16,setup[set+2],16,0);
			Show_Str(0,52,128,12," On   Next   determine ",12,0);
			OLED_Refresh_Gram();// Update display 
			time2=0;
			while(1)
			{
    
						// Timeout lock screen 
						time2++;
						if(time2>10000 | key_num==4){
      
							
							OLED_Clear();
								DisLock();
								if(time2>10000)beep_on_mode2();
								time2 =0;
								OLED_Clear();
								goto MAIN;
						}
						// Bluetooth lock of mobile phone 
						if(memcmp(USART_RX_BUF,"LOCK",4)==0)	{
    
							DisLock();
							goto MAIN;
						}
						
						// Function option selection 
						key_num=Button4_4_Scan();	
						if(key_num)
						{
    
							if(key_num==13){
    
								if(arrow>0)arrow--;
								goto MENUNOCLR;
							}
							if(key_num==15){
    
								if(arrow<5)arrow++;
								goto MENUNOCLR;
							}
							if(key_num==16){
    
								switch(arrow)
								{
    
									case 0:Add_FR();		break;// Recording finger 
									case 1:Del_FR();		break;// Delete fingerprint 
									case 2:SetPassworld();break;// Change Password 
									case 3:Set_Time(); break;  // Setup time 
									case 4:Add_Rfid(); break;  // Enter the card 
									case 5:Massige(); break;  // display information  
								}
								goto MENU;
							}		
						}delay_ms(1);
			}	
	}
		 
 }
 

6、 ... and 、 Android APP Design

1、 Icon design

2、 Main interface design
Usage method ：① Get into APP, wait for 3-5 second , Automatically connect the smart door lock
② The upper left corner shows connected , Input password , Click on OK You can unlock
③ When unable to automatically connect , Click the connect button to enter the manual connection interface

3、 Connection interface
Usage method ： Double click to connect

4、 Information interface design

7、 ... and 、 Finished product display

1、 Boot screen
Insert picture description here

2、 Lock screen display time

3、 Unlock the display menu