Week 8 - Journal

I needed this assignment idea to be related to the servo motor, so I can be more familiar with it since a big portion of my final project is based on it, upon a few searches, I found a very relatable application that may be applied to many applications in out daily life, and it is the car parking system using servo, buzzer and Bluetooth module.

Here is the link of inspiration: https://create.arduino.cc/projecthub/guruashishchoudhary29/automatic-parking-system-81d9fa

Tinkercad

Used to simulate electrical circuits and components, so you can calibrate your circuit calculations and needs before even going to the hardware steps.

Arduino IDE

Used to compile the code written in the programming sketches and upload it directly to our Arduino Board.

Arduino Bluetooth Control App

It is an android mobile app that is used to give inputs to arduino based on bluetooth module.

Tools and Materials

Arduino Uno Board
Ultrasonic Sensor
LDR Module
Servo Motor
LED
Breadboard
Jumpers and Wires

Input Components:
-Bluetooth module.

Output components:
- Servo motor.
- Buzzer.

So the first thing the code does is waiting for input data to be received from the bluetooth mobile application, if it doesn't it stays in a loop in this step until it does.

Then upon data receiving, starts to process actions based on it:

Input data = "1": The buzzer is powered on and the servo motor is turned off, or returns to its default position and then turns off.

Input data = "2": The servo motor is turned on with an angle of 90 degrees, as well as the buzzer is turned off.

Input data = "3": Both the servo motor and the buzzer is turned off and the servo motors return to its default angle.

If the input data i anything else, the code just neglects it and then repeat the loop again waiting for input.

The code consists of 9 parts, which will be explained in the following lines:

• Part 1:
  It is basically summoning all the libraries we will want to use in this program, in our case the servo motor library.

• Part 2:
  Defining all the instances of the hardware components we will use.

• Part 3:
  In this part we stored the pins numbers in meaningful variables so it can be easily used across the code without any problem, this is called decoupling.

• Part 4:
  Initiating the variables that will be used in the code. .

• Part 5:
  Initiating hardware components and setting the state for every used pin.

• Part 6:
  Creating a loop to handle the program while no data is coming, and how to handle if any data came.

• Part 7:
  The first condition - Powering the buzzer when having certain input.

• Part 8:
  The second condition - Powering the servo when having certain input.

• Part 9:
  The third condition - Powering off both the servo and the buzzer when having certain input.