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      • Antennas
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      • Speed Controllers (ESC)
      • Drone Transmitter & Receiver
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      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Accessories
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    • Title-menu
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    • Electronics Parts
      • 3D Printer Heatbed and Accessories
      • Limit Switch
      • Stepper Motors and Accessories
      • 3D Printer Display and Controllers
      • Stepper Motor Drivers
    • Mechanical Parts
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Aluminum Extrusion and Accessories
      • Smooth Rods
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    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Orange Li-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & 6 cell (22.2V)
    • Orange Premium BMS
    • Other Batteries
      • TX/RX Li-PO Batteries
      • LifePO4 Battery
      • Coin Cell Battery
      • CNC and PLC Machine Battery
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      • Battery Protection Board
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      • Battery Connector
      • Battery Harness
      • Power Adapter and Cable
      • Lipo Voltage Checker
      • Parallel Charging Board
      • LiPO Battery Sack, Covers & Mats
  • Motors, Drivers, Actuators
    • Brushed DC Motor
      • Orange Johnson Geared Motor
      • Johnson Geared Motor (Grade B)
      • DC Geared Motor with Encoder
      • 25 GA Motors
      • Orange OG 555 DC Motor
      • RS 50 Geared Motor
      • Orange RS 775 DC Motor
      • Orange PM33 Motor
      • Orange Square Gear Box Motor
      • Orange Rectangular Gearbox Motor
    • Miscellaneous Motors
      • Servo Motors
      • AC Motor
      • Stepper Motor
      • BO Motors
      • Metal Gear Box Motor
      • Plastic Gear Box Motors
      • Drone Motor
      • Solenoids & Electromagnets
      • Linear Motor/Actuator
      • Cooling Fans
      • Pumps
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      • Motor Mounting Brackets
      • Bearings
      • Couplings
      • JR Servo Cable
      • Futaba Servo Cable
      • Push Rod
      • Other Accessories
    • Motor Drivers
      • Brushed DC Motor Driver
      • Brushless DC Motor Driver (ESC)
      • Stepper Motor Drivers
      • Servo Motor Driver
    • N20 Micro Gear Motor
      • Micro Gear Motor with Encoder
      • Micro Gear Motor without Encoder
      • Vibration Motor
    • Planetary Gear Motor
      • Orange Planetary Gears Motor
      • Orange Planetary BLDC Motors
      • Planetary Gear DC Motors
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      • Raspberry Pi
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  • Original Arduino Boards
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      • ARDUINO NANO 33 BLE
      • Arduino Nano 33 BLE Sense
    • Other Arduino Board
      • Arduino OPLÀ IoT Kit
      • Arduino Tiny Machine learning Kit
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      • Arduino Portenta Vision Shield – LORA
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      • ARDUINO MKR WAN 1300
      • Arduino Micro without Headers
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    • Distance and Vision
      • LiDAR Sensor
      • RFID Card, Tags & Reader
      • Sound Sensor
      • Generic Ultrasonic Sensors
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      • Line Sensor
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      • Biometric/ECG/EMG Sensor
      • Rotary Encoder
      • Current and Voltage
    • Load, Pressure, Flow & Vibration
      • Water TDS, pH, Flow, Level and Pressure Sensor
      • Vibration/Tilt Sensor
      • Load / Pressure / Force / Flex Sensor
    • Sensor Kits
      • Sensor Kits Link and Image
  • Cameras
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      • Smart Vision Camera
      • Thermal Cameras
      • Raspberry Pi Camera
  • IoT and Wireless
    • IoT and Wireless
      • Ai Thinker ESP Wifi Modules
      • ESP WiFi Module
      • Development Board/Kit
      • xBee Zigbee Module
      • LORA WiFi
      • Bluetooth and NRF Modules
      • GSM / GPRS
      • Transmitter and Receivers
      • Advance Controller Board
      • Wireless Smart Switches
  • Electronic Modules
    • Displays
      • Seven Segment LED Display
      • LCD Displays
      • HMI LCD Display
      • OLED Display
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      • e-Ink Display
    • Interface Module
      • Programming Module
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      • Bluetooth Interfacing
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      • Memory Interfacing
    • LED and Laser Modules
      • LED Module
      • LASER Module
      • Addressable LED and Drivers
    • Miscellaneous Modules
      • Breakout Board
      • Relay Switch Modules
      • Electronic Switches/Keypads
      • Solar Panels and Controllers
      • Wearable Electronic
      • Real Time Module (RTC)
      • Audio Module/ Amplifier
      • Mux-DeMux & Logic Converter
    • Voltage Regulator
      • Boost Converter (Step-Up )
      • Buck Converter (Step-Down)
  • Electronic Components
    • Semiconductor ICs
      • Microcontroller IC
      • Amplifier ICs
      • Interface IC
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      • Optocoupler IC
      • Other Semicondutor ICs
      • IC Base
    • LED | Plugs / Connectors
      • LEDs Kit
      • LEDs
      • Through Hole LED
      • SMD LED
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    • Basic Electronic Components
      • Component Kit
      • Resistor
      • Inductor
      • Capacitor
      • Diode
      • Transistor
      • Crystal Oscillator
    • Miscellaneous Component
      • Potentiometer
      • Fuse
      • Mechanical Switches
      • Buzzer/Speaker
      • Aluminium Heat Sink
      • Bread Board and Zero PCB
  • Wires and Cables
    • PVC and Silicone Wires
      • PVC Wire
      • 6 to 10 AWG
      • 12 to 16 AWG
      • 18 to 22 AWG
      • 24 to 30 AWG
    • Cables
      • DuPont / Jumper Cable
      • Interfacing Cables
      • JR Servo cable
      • Futaba servo cable
      • FFC Cable
    • Heat Shrink Tubing / Sleeve
      • Heat Shrink Combos
      • 1 mm to 4 mm
      • 5 mm to 10 mm
      • 11 mm and Above
      • PVC Heat Shrink
    • Tools and Accessories
      • Wire Cutter / Stripper
      • Cable Ties
      • Sleeves and Drag Chain
  • Instruments & Tools
    • Measuring Instruments & Tools
      • Oscilloscope & Signal Generator
      • Ammeter, Voltmeter and Multimeter
      • Other measuring Instruments
      • Soldering Tools and Kits
      • Glue Gun & Sticks
      • Workbench Accessories
    • Power Supply
      • SMPS
      • Transformers
      • Hi-Link Power Supply Module
  • Mechanical
    • Mechanical Robotic Parts
      • Chassis
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • Lead Screw
      • Linear Guide Rail
      • Couplings
      • Bearings
      • Motor Mounting Brackets
      • Gears
    • Wheels
      • Mecanum Wheels
      • Omni Wheels
      • Heavy Duty Wheel
      • RC Car Wheel
      • Pulley Wheel & Track Belt
      • Caster Wheels
    • Carbon Fiber
      • Carbon Fiber Sheets and Strips
      • Carbon Fiber Tubes and Rods
    • Nuts and Bolts
      • Countersunk(CSK) Screws
      • Socket Set Screws (Allen Grub)
      • Socket Head Cap Screw (Allen Bolt)
      • CHHD Screws
      • Nut and Washers
      • Nylon Nuts and Bolts
      • Spacer and Standoff
0 ₹ 0.00
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  • Shop by Brands
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  • Orange Premium Learning Kits
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      • Speed Controllers (ESC)
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    • Propellers
      • Upto 3 Inch
      • 3 Inch to 7 Inch
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      • 11 Inch and Above
      • Carbon Fiber Propeller
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    • Title-menu
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      • 3D Printer Heatbed and Accessories
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      • Stepper Motor Drivers
    • Mechanical Parts
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Aluminum Extrusion and Accessories
      • Smooth Rods
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      • ORANGE Premium Filaments
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  • Lithium Batteries
    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Orange Li-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & 6 cell (22.2V)
    • Orange Premium BMS
    • Other Batteries
      • TX/RX Li-PO Batteries
      • LifePO4 Battery
      • Coin Cell Battery
      • CNC and PLC Machine Battery
    • Battery Accessories
      • Battery Protection Board
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      • Battery Connector
      • Battery Harness
      • Power Adapter and Cable
      • Lipo Voltage Checker
      • Parallel Charging Board
      • LiPO Battery Sack, Covers & Mats
  • Motors, Drivers, Actuators
    • Brushed DC Motor
      • Orange Johnson Geared Motor
      • Johnson Geared Motor (Grade B)
      • DC Geared Motor with Encoder
      • 25 GA Motors
      • Orange OG 555 DC Motor
      • RS 50 Geared Motor
      • Orange RS 775 DC Motor
      • Orange PM33 Motor
      • Orange Square Gear Box Motor
      • Orange Rectangular Gearbox Motor
    • Miscellaneous Motors
      • Servo Motors
      • AC Motor
      • Stepper Motor
      • BO Motors
      • Metal Gear Box Motor
      • Plastic Gear Box Motors
      • Drone Motor
      • Solenoids & Electromagnets
      • Linear Motor/Actuator
      • Cooling Fans
      • Pumps
    • Motor Accessories
      • Motor Mounting Brackets
      • Bearings
      • Couplings
      • JR Servo Cable
      • Futaba Servo Cable
      • Push Rod
      • Other Accessories
    • Motor Drivers
      • Brushed DC Motor Driver
      • Brushless DC Motor Driver (ESC)
      • Stepper Motor Drivers
      • Servo Motor Driver
    • N20 Micro Gear Motor
      • Micro Gear Motor with Encoder
      • Micro Gear Motor without Encoder
      • Vibration Motor
    • Planetary Gear Motor
      • Orange Planetary Gears Motor
      • Orange Planetary BLDC Motors
      • Planetary Gear DC Motors
  • Development Board
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      • Arduino Micro without Headers
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  • Sensors
    • Ultrasonic and Proximity
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      • Autonics Proximity Sensor
      • Generic Proximity Sensor
    • Distance and Vision
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      • RFID Card, Tags & Reader
      • Sound Sensor
      • Generic Ultrasonic Sensors
    • Temp., Humidity, Gas & Environmental
      • Temperature & Humidity Sensor
      • Environmental Sensors
      • Gas and Dust Sensor
      • Thermoelectric Cooler
    • Light and Sound
      • Light/Color Sensor
      • PIR and IR Sensor
      • Line Sensor
    • Biometric, Rotation, and Current
      • Biometric/ECG/EMG Sensor
      • Rotary Encoder
      • Current and Voltage
    • Load, Pressure, Flow & Vibration
      • Water TDS, pH, Flow, Level and Pressure Sensor
      • Vibration/Tilt Sensor
      • Load / Pressure / Force / Flex Sensor
    • Sensor Kits
      • Sensor Kits Link and Image
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      • Smart Vision Camera
      • Thermal Cameras
      • Raspberry Pi Camera
  • IoT and Wireless
    • IoT and Wireless
      • Ai Thinker ESP Wifi Modules
      • ESP WiFi Module
      • Development Board/Kit
      • xBee Zigbee Module
      • LORA WiFi
      • Bluetooth and NRF Modules
      • GSM / GPRS
      • Transmitter and Receivers
      • Advance Controller Board
      • Wireless Smart Switches
  • Electronic Modules
    • Displays
      • Seven Segment LED Display
      • LCD Displays
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      • OLED Display
      • LED Dot Matrix Display
      • e-Ink Display
    • Interface Module
      • Programming Module
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      • Memory Interfacing
    • LED and Laser Modules
      • LED Module
      • LASER Module
      • Addressable LED and Drivers
    • Miscellaneous Modules
      • Breakout Board
      • Relay Switch Modules
      • Electronic Switches/Keypads
      • Solar Panels and Controllers
      • Wearable Electronic
      • Real Time Module (RTC)
      • Audio Module/ Amplifier
      • Mux-DeMux & Logic Converter
    • Voltage Regulator
      • Boost Converter (Step-Up )
      • Buck Converter (Step-Down)
  • Electronic Components
    • Semiconductor ICs
      • Microcontroller IC
      • Amplifier ICs
      • Interface IC
      • WiFi ICs
      • Clock, Timer and Counter ICs
      • Sensor ICs
      • Optocoupler IC
      • Other Semicondutor ICs
      • IC Base
    • LED | Plugs / Connectors
      • LEDs Kit
      • LEDs
      • Through Hole LED
      • SMD LED
      • RF Connectors
      • Berg / FPC / IDC Connector
      • Power Connector
      • Interface Connector
    • Basic Electronic Components
      • Component Kit
      • Resistor
      • Inductor
      • Capacitor
      • Diode
      • Transistor
      • Crystal Oscillator
    • Miscellaneous Component
      • Potentiometer
      • Fuse
      • Mechanical Switches
      • Buzzer/Speaker
      • Aluminium Heat Sink
      • Bread Board and Zero PCB
  • Wires and Cables
    • PVC and Silicone Wires
      • PVC Wire
      • 6 to 10 AWG
      • 12 to 16 AWG
      • 18 to 22 AWG
      • 24 to 30 AWG
    • Cables
      • DuPont / Jumper Cable
      • Interfacing Cables
      • JR Servo cable
      • Futaba servo cable
      • FFC Cable
    • Heat Shrink Tubing / Sleeve
      • Heat Shrink Combos
      • 1 mm to 4 mm
      • 5 mm to 10 mm
      • 11 mm and Above
      • PVC Heat Shrink
    • Tools and Accessories
      • Wire Cutter / Stripper
      • Cable Ties
      • Sleeves and Drag Chain
  • Instruments & Tools
    • Measuring Instruments & Tools
      • Oscilloscope & Signal Generator
      • Ammeter, Voltmeter and Multimeter
      • Other measuring Instruments
      • Soldering Tools and Kits
      • Glue Gun & Sticks
      • Workbench Accessories
    • Power Supply
      • SMPS
      • Transformers
      • Hi-Link Power Supply Module
  • Mechanical
    • Mechanical Robotic Parts
      • Chassis
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • Lead Screw
      • Linear Guide Rail
      • Couplings
      • Bearings
      • Motor Mounting Brackets
      • Gears
    • Wheels
      • Mecanum Wheels
      • Omni Wheels
      • Heavy Duty Wheel
      • RC Car Wheel
      • Pulley Wheel & Track Belt
      • Caster Wheels
    • Carbon Fiber
      • Carbon Fiber Sheets and Strips
      • Carbon Fiber Tubes and Rods
    • Nuts and Bolts
      • Countersunk(CSK) Screws
      • Socket Set Screws (Allen Grub)
      • Socket Head Cap Screw (Allen Bolt)
      • CHHD Screws
      • Nut and Washers
      • Nylon Nuts and Bolts
      • Spacer and Standoff
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      • Speed Controllers (ESC)
      • Drone Transmitter & Receiver
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      • Upto 3 Inch
      • 3 Inch to 7 Inch
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      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Accessories
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    • Title-menu
    • e-Bike Parts and Kits
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      • Ebike Motor and Controller
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      • 3D Printer Heatbed and Accessories
      • Limit Switch
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      • Stepper Motor Drivers
    • Mechanical Parts
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • 3D Printer Couplings
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      • Timing Belt and Pulley
      • Nut Insert
      • Sleeves and Drag Chain
      • Linear Guide Rail
    • Filaments
      • ORANGE Premium Filaments
      • ESUN Filaments
      • Resins
  • Lithium Batteries
    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Orange Li-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & 6 cell (22.2V)
    • Orange Premium BMS
    • Other Batteries
      • TX/RX Li-PO Batteries
      • LifePO4 Battery
      • Coin Cell Battery
      • CNC and PLC Machine Battery
    • Battery Accessories
      • Battery Protection Board
      • Battery Pack Accessories & Holders
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      • Battery Connector
      • Battery Harness
      • Power Adapter and Cable
      • Lipo Voltage Checker
      • Parallel Charging Board
      • LiPO Battery Sack, Covers & Mats
  • Motors, Drivers, Actuators
    • Brushed DC Motor
      • Orange Johnson Geared Motor
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HomeBlogsMicrocontrollerArduinoRFID and Password Based Door Lock System Using Arduino

RFID and Password Based Door Lock System Using Arduino

Arduino, Blogs, RFID Module  0  comments  1450 Views  Saturday, January 2, 2021











A step by step guide for RFID and Password based door lock system using Arduino

RFID and Passward based Door Lock System

Generally, the Basic requirement of security can be done by using mechanical electric door locks. Now, in this digital world, we are using various digital technology. For example, identification of digital device using cards or token, door lock system using digital technology, automatic door opening and closing etc. Nowadays, in most hotels, you can see RFID Door Lock Mechanism where you don’t need a key to unlock the room. This kind of systems used for controlling the movement of a door without using a key. This article represents the RFID and Password based Door Lock system. 

Components Required for Door lock system

  • Arduino Mega or any other Arduino 
  • LCD1602 Parallel LCD Display with Blue Backlight
  • MFRC522 RFID Reader & tag
  • 4X4 Keypad or 4X3 Keypad
  • DC 12V Door lock Solenoid
  • 10 k potentiometer
  • 5V Relay module
  • 5V to 12V Power source (For DC jack)

Working Of Door Lock System

The RFID reader communicates with the Arduino through the SPI protocol and different Arduino boards have different SPI pins. Here, we are using RFID Reader/Writer RC522 SPI S50 with RFID Card.

The 16*2 Parallel LCD Display with Blue Backlight is interfaced with Arduino Mega to show the message. Here, we are using 4*4 matrix keypad to enter the password for door opening. In this prototype, we are operating the 12V door lock solenoid through the relay.

  • After, doing all the connection properly and upload the code. It will ask for scanning the card/tag and ask for the set password.
  • On scanning the wrong tag or on entering the wrong password, it will show the message of wrong input.
  • On scanning the right tag and entering the right password, it will send us a confirmation message that the door has opened.

 

Pin Connection of the components with Arduino

1. Connection of RFID reader with Arduino Mega

Connection of RFID sensor with arduino Mega

Connect the MFRC522 module with the Arduino Mega as per the below pin connections. Different Arduino’s have different SPI pins. If you are using different Arduino, then make connections according to that.

RC522 Reader- Uno/Nano- MEGA

  • SDA- D10- D9
  • SCK - D13- D52
  • MOSI- D11- D51
  • MISO- D12- D50
  • IRQ- N/A- N/A
  • GND- GND- GND
  • RST- D9- D8
  • 3.3V- 3.3V- 3.3V

2. Connection of LCD with Arduino Mega

Connection of LCD  with arduino Mega

We are interfacing the LCD1602 with Arduino using the data pins of the LCD module. The same connection and circuit will work for all Arduino and compatible boards. Connect the circuit as per the below connection,

  • VSS (0V)- Ground potential- Gnd
  • VDD (5V)- Positive Voltage
  • V0 (Contrast)- Contrast adjustment (used 10K pot)
  • RS- Register select (Instruction select-0 and Data select-1)- 
  • R/W- Read/write (Read-0 and Write-1)-
  • E- Enable pin
  • D4- A10
  • D5- A11
  • D6- A12
  • D7- A13
  • LCD +A- 5V
  • LCD-K- Gnd

3. Connection of Keypad of Arduino Mega

Connection of Keypad with arduino Mega

 The 4X4 keypad has 8 connections but we don’t require the last column and row of the keypad. We only require 3X3 keypad for the password. So we won’t use the PIN 4 and 8 of the keypad. You can also use 4X3 keypad instead of 4X4 and 3X3 keypad.

  • 1st pin- A0
  • 2nd pin- A1
  • 3rd pin- A2
  • 5th pin- A3
  • 6th pin- A4
  • 7th pin- A5

4. Connection of Relay and Door lock solenoid with Arduino Mega

Connection of Relay and Door lock solenoid with arduino Mega

Here, we are using a 5V relay module. It has 3 inputs and they are,

  • Vcc-Vcc
  • Gnd- Gnd
  • Signal- 49 (Active High)

And connect the 12V Door lock solenoid to the output of the relay module.

Software and Programming 

Download the Arduino IDE Software and the required library for this code from the below links,

  • Arduino IDE 1.8.13
  • SPI Library
  • Software Serial Library
  • Keypad Library
  • RFID Library for MFRC522 
// Include required libraries
#include <MFRC522.h>
#include <Keypad.h>
#include <SoftwareSerial.h>
#include <SPI.h>
// Create instances
MFRC522 mfrc522(53, 5); // MFRC522 mfrc522(SS_PIN, RST_PIN)
// include the library code:
#include <LiquidCrystal.h>

 

// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = A8, en = A9, d4 = A10, d5 = A11, d6 = A12, d7 = A13;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
#define Doorrelay 49

 

char initial_password[4] = {'1', '2', '3', '4'};  // Variable to store initial password
String tagUID = "19 47 64 C1";  // String to store UID of tag. Change it with your tag's UID
char password[4];   // Variable to store users password
boolean RFIDMode = true; // boolean to change modes
boolean NormalMode = true; // boolean to change modes
char key_pressed = 0; // Variable to store incoming keys
uint8_t i = 0;  // Variable used for counter
// defining how many rows and columns our keypad have
const byte rows = 3;
const byte columns = 3;
// Keypad pin map
char hexaKeys[rows][columns] = {
  {'1', '2', '3'},
  {'4', '5', '6'},
  {'7', '8', '9'}
 
};
// Initializing pins for keypad
byte row_pins[rows] = {A0, A1, A2};
byte column_pins[columns] = {A3, A4, A5};
// Create instance for keypad
Keypad keypad_key = Keypad( makeKeymap(hexaKeys), row_pins, column_pins, rows, columns);
void setup() {
  Serial.begin(9600);
  pinMode(Doorrelay, OUTPUT);
  Serial.println("Scan your tag......... ");
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("WELCOME");
  SPI.begin();      // Init SPI bus
  mfrc522.PCD_Init();   // Init MFRC522
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Scan ur TAG");

}
void loop() {
  
 if (NormalMode == true) {
    // System will first look for mode
    if (RFIDMode == true) {
      // Function to receive message

 

      // Look for new cards
      if ( ! mfrc522.PICC_IsNewCardPresent()) {
        return;
      }
      // Select one of the cards
      if ( ! mfrc522.PICC_ReadCardSerial()) {
        return;
      }
      //Reading from the card
      String tag = "";
      for (byte j = 0; j < mfrc522.uid.size; j++)
      {
        tag.concat(String(mfrc522.uid.uidByte[j] < 0x10 ? " 0" : " "));
        tag.concat(String(mfrc522.uid.uidByte[j], HEX));
      }
      tag.toUpperCase();
      //Checking the card
      if (tag.substring(1) == tagUID)
      {
        Serial.println("Tag mached. ");
        Serial.println("Enter Password");
        lcd.clear();
        lcd.setCursor(0, 1);
        lcd.print("TAG matched");
        delay(2000);
        lcd.clear();
        lcd.print("Enter Password:");
        lcd.setCursor(0, 1);
        RFIDMode = false; // Make RFID mode false
      }
      else
      {
        Serial.print("Wrong Tag Shown");
        Serial.println("  Access Denied ");
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Wrong Tag Shown");
        lcd.setCursor(0, 1);
        lcd.print("Access Denied");
        delay(3000);
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Scan Your Tag   ");        
        
      }
    }
    // If RFID mode is false, it will look for keys from keypad
    if (RFIDMode == false) {
      key_pressed = keypad_key.getKey(); // Storing keys
      if (key_pressed)
      {
        password[i++] = key_pressed; // Storing in password variable
        lcd.setCursor(0, 1);
        lcd.print("****");
      }
      if (i == 4) // If 4 keys are completed
      {
        delay(200);
        if (!(strncmp(password, initial_password, 4))) // If password is matched
        {
          Serial.print("Password Accepted");
          lcd.clear();
          lcd.print("Pass Accepted");
          digitalWrite(Doorrelay, LOW);
          
          
          lcd.clear();
          i = 0;
          RFIDMode = true; // Make RFID mode true
        }
        else    // If password is not matched
        {
          Serial.println("Wrong Password");
          lcd.clear();
          lcd.print("Wrong Password");        
          delay(5000);
          
          lcd.clear();
          i = 0;
          RFIDMode = true;  // Make RFID mode true
        }
         
          digitalWrite(Doorrelay, HIGH);
          lcd.setCursor(0, 0);
          lcd.print("Scan ur TAG");
      }
    }
  }
}

Now, you can see the output in the below GIF.

  • Scanning of your tag

scanning of tags

  • Enter the correct passward, Door will be opened.

Door is opened

Hope this tutorial helps you to learn about the RFID and Password based Door Lock system. You can easily make the security for your home with the reference of this tutorial so let's hurry up!


Tags : Keypad based door lock system , Passward based door lock system , rfID based door lock system

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