Aim:
To take a messy piece of code and improve it for clarity, reliability, and maintainability.

Requirements:

• Arduino IDE or Thonny IDE

• Arduino Uno or Raspberry Pi Pico

• Multi-sensor setup (e.g., LDR + LM35 temperature sensor)

• A sample buggy code (given by teacher)

Procedure (Step-by-Step)

1. Examine the Given Code
   • Read through the messy code carefully.

   • Identify unclear variable names, repeated logic, and missing explanations.

2. Add Comments
   • Write a short note above each important section explaining what it does.

Example:

cpp
CopyEdit
// Reading temperature from LM35 sensor

int tempValue = analogRead(A0);

1. Organize into Functions
   • Break the code into smaller functions such as:
     • setupSensor() → to initialize sensors

     • readTemp() → to get temperature data

     • controlLight() → to turn LED ON/OFF based on conditions

2. Test the Code
   • Upload your cleaned code to the microcontroller.

   • Run and check if it behaves as expected.

3. Debug and Improve
   • If it doesn’t work, use Serial Monitor or print statements to see where it’s going wrong.

   • Remove any unnecessary lines and make the code more efficient.

4. Final Review
   • Ensure that the code works in all test cases.

   • Check if it’s readable for someone new to the project.