Week 8 # - Journal

Ideation

Tell us about your assignment's idea for this week. Why do you care about this idea? What inspired you? (Please include images or links to sources of inspiration)

📌 Ideation

For this week's assignment, I adapted my Smart Health Reminder Desk project to include wireless communication using Bluetooth. The goal is to allow users to activate hydration and break reminders remotely through a phone or PC GUI.

🔹 Why this idea?

I wanted to improve my existing project by adding wireless functionality, making it more user-friendly and accessible. It is in my "nice to have" features.

🔹 How it works?

Pressing 1 on the Bluetooth GUI:
- Activates "Hydration" module
- Yellow LED turns ON
- LCD displays "Drink Water"
Pressing 2 on the Bluetooth GUI:
- Activates “Break Reminder” module
- Green LED turns ON
- LCD displays "Take a Break"

Image for Reference

Tool Chain

Which software/machines/materials did you use in the assignment? Why?

Software:

1. Tinker CAD

Online software for 3D design, electronics, and coding.

I used it to design and simulate my circuit.

2. Arduino IDE

Online software for programming Arduino.

I used it to program my circuit.

3. Bluetooth Terminal App (Android):

Used as the phone GUI to send commands to the Arduino.

Components

Breadboard

LEDs

Resistors

LCD Screen

Connecting Wires

HC-05 Bluetooth Module

Arduino UNO

Design/Preparation Process

Explain the design and/or preparation process of your assignment. How did you use the tool or software to design and/or prepare your assignment before fabrication/implementation?

Design

Design Steps

I started by brainstorming ways to integrate Bluetooth communication into my existing smart desk reminder.
I sketched the circuit layout on paper.
Simulated the wiring on TinkerCAD to ensure proper connections and functionality.
Action:

The Bluetooth module communicates with the Arduino via serial communication, while the LEDs and LCD display output is based on the received commands.

Design On Tinker Cad

🔹 Circuit Wiring (TinkerCAD Simulation)

HC-05 Bluetooth Module:
- VCC → 5V
- GND → GND
- TX → Arduino Pin 10 (Software Serial RX)
- RX → Arduino Pin 11 (via voltage divider for 3.3V compatibility)
Yellow LED: Arduino Pin 2
Green LED: Arduino Pin 3
LCD I2C Module: SDA → A4, SCL → A5

🔹 Working Logic (Pseudocode)

Initialize Bluetooth and LCD modules.
Continuously read serial data:
- If received '1':
  - Turn ON Yellow LED
  - Display "Drink Water" on LCD
- If received '2':
  - Turn ON Green LED
  - Display "Take a Break" on LCD
- If received other inputs: No action.

🔹 Code Source

Reference for LCD Code (LINK)
Developed the codeafter downloading the SoftwareSerial library of the LCD named (LiquidCrystal)..
Added LEDs commands to the code.

Downloaded LCD Library

Reference

Click Here!

Reference Code

Final Version

The Circuit was simulated on TinkerCad

Development/Implementation Process

Explain the development/implementation process of your assignment. How did you use the machine/tool to manufacture or implement the design of your assignment?

Prototyping & Build

Building The Curcuit

Added Another Library

Will Explain in Challenges Section

VID_20250221_160102.mp4

Curcuit is Successfully Working!!

Community of Learning

Did you ask for feedback? What are the ideas that others have contributed or suggested? What was someone else’s idea that you built upon? How did you help your peers? How did your peers help you?

Overcoming Challenges

When you got stuck, what/who did you turn to? At what point did you have to pause to research or learn more before moving on? What are some mistakes, pitfalls, or challenges that others can avoid if they were doing this assignment?

Challenges

A) The circuit didn't work

Upon troubleshooting and search turned out I needed a different library for the LCD communication named "LiquidCrystal I2C" instead of "LiquidCrystal".
Also I needed to use another library named "Wire.h"

References:

Ref 1

https://forum.arduino.cc/t/i2c-lcd-module-using-wire-h/1153363/5

Ref 2

https://forum.arduino.cc/t/wire-h-library-and-lcd-i2c/202480

B) Code failed to upload

Solution: I removed the Bluetooth module from the breadboard while uploading.

Correction

Final Project

How can you use the skills and knowledge that you've acquired this week in your final project?

Title of Media

Learned the LCD screen coding that I will use in the final project.

WOW!

What is the coolest thing that you've learned this week? What is something that you will never forget from this week?

Weekly Digest [OPTIONAL]

Tell us about any other cool things that you've made this week: in the Hands-on activity, tutorial examples, exercises, or any other cool mini-project that you tried out aside from the assignment.

Assignment Design Files

Arduino Code

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