===== Wall Clock and Voting Tabulator =====

The wall clock and voting tabulator is built using a RaspberryPi to create a WiFi Access Point for the voting boxes.  This then communicates with an Arduino Mega 2560 that runs the display and tabulates votes.  The date and time are kept by a DS3231 real-time clock module.

The available commands on the keypad are:
  - Switch to clock mode
  - Switch to Set Clock mode.  The clock then waits for 5 additional keypad presses in the format hhmmx where x equal to 0 indicates AM and x greater than 0 indicates PM.
  - Switch to Set Date mode.  The clock then waits for 8 additional keypad presses in the format mmddyyyy.
  - Switch to Vote mode
  - Reveal voting results as Count
  - Reveal voting results as Pass/Fail
  - Subtract 1 hour from the clock (for DST)
  - Add 1 hour to the clock (for DST adjust)
  - Switch to random display mode

The source code for the clock can be found [[https://drive.google.com/open?id=0ByE4uXHeoDYNLVZGaEZMUXdvd28|here]].  In addition, there are a number of third-party libraries used.  The DS3231 library can be found [[https://github.com/jarzebski/Arduino-DS3231|here]].  The other libraries are standard libraries and most can be installed directly within the Arduino IDE.