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Make Your Own Arduino RFID Door Lock – Part 2: Unlock Using Your Smartphone

In the previous article Make Your Own Arduino RFID Door Lock, we made an Arduino RFID door lock. We were able to unlock a door using a RFID tag or a keypad. Well, what if you want to simplify the process even more? In this second part, we will add an extra feature: unlocking the door using your smartphone. It is an easier way to control the door, especially when everyone prefers having a single device that can give you access to everything. So how can we do this? We’ll connect a bluetooth module to the previous set-up and also connect the electrical door.

Hardware

  • HC-05 Bluetooth Module
  • ABK-704L Electrical
  • Arduino Nano
  • RFID RC522
  • Piezo Buzzer
  • 2x 330 Resistor
  • Keypad 4×4
  • Adapter I2C for LCD
  • LCD16X2BL
  • DC-DC Step-Down Module MP1584EN

Software

  • MIT App Inventor 2
  • Arduino IDE
  • Github