Arduino Enigma Machine

Arduino sketch that implements a very simplified version of the enigma machine with 3 rotors.

Hardware Setup

• Arduino Uno
• DFRobot LCD Keypad Shield
• Buzzer
• USB Cable

Usage

Phase 1 - Set the rotors

• Turn on the Arduino board
• Press the buttons 'left' and 'right' to select a rotor
• Press the buttons 'up' and 'down' to set the initial rotor value
  

Phase 2 - Set the value to be encrypted/decrypted

• Move the cursor to the first position of the LCD display's second line
• Press the buttons 'up' and 'down' to set the value to be encrypted/decrypted
  

Phase 3 - Encrypt/decrypt

• Press the button 'select' to encrypt/decrypt the selected value
  Please note that the rotors may change value (rotation) when 'select' is pressed
  

Repeat the procedure for each value of your 'secret' message.

Example

Initial rotor values: R1=D, R2=E, R3=F
Message to encrypt: HELLOWORLD
Encrypted message: STGALBRCEW