CSE321_Project_Final

Project Link: https://github.com/ntdinh05/321_project

Hardware Components

• Arduino R3 UNO
• Breadboard
• Jumper wires
• 2 ultrasonic sensors
• 16x2 LCD Display
• Joystick
• Push button
• RTC module DS1307
• LED
• Resistors for LCD and LED wiring

Hardware wiring

• Ultrasonic 1: trigPin1 = 9, echoPin1 = 10
• Ultrasonic 2: trigPin2 = 11, echoPin2 = 12

Note: ideally, the 2 sensors should be placed horizontal separately (trig/echo face of the sensors facing the same direction) by 5 - 7 inches in between to prevent crosstalk.

• LED: lightPin = 8
• Joystick: joyXPin = A0, joyYPin = A1, joySWPin = 13
• Push button: menuButtonPin = A2

Software Setup

Library

• LiquidCrystal
• RTClib

Compile and Run

• Use the Arduino IDE, open the code.ino file, choose your board, and upload the code
• Note: if you run the RTC in the first time, you have to write some scripts to set up the time for RTC

Interact manual

• After having your system set up, walk by the 2 sensors normally to see the occupancy increasing and decreasing
• For the menu, press the push button (not the joystick switch)
• For navigation in menu, move the joystick UP/DOWN. To select an setting in menu, press the joystick switch.
• For navigation in setting, move the joystick LEFT/RIGHT to select Min/Sec or Hr/Min, UP/DOWN to increment/decrement the selecting variable
• To save the setting/go back to the main screen, press the push button again

Main features

1. x2 Ultrasonic sensors (main feature): measure the occupancy, using a threshold distance value. Objects in the threshold means a sensor is triggered. We decide entry/exit based on which one is triggered first.
2. Set Timeout: set how long will the lights go off
3. Set Do not Disturb: the lights will not off if in that time range
4. Set Occupancy: declare how many people in the room