$***$ Project OverviewSteps to Implement$>$ Step $1$: Setup Serial Communication

The Arduino UNO will communicate with the PC using the UART interface over a USB connection.

Step $2$: Writing the Code

The user will enter an expression like or $,$ and the Arduino will parse the input, perform the calculation, and return the result.

If the user enters a division by zero $($e$.$g$.,\text{'}12/0$Error: Division by zero$`.$

If the user enters an invalid operator, the Arduino will display: $.$

Step $3$: Upload and Test the Code

Upload the code to your Arduino UNO.

Open the Serial Monitor in the Arduino IDE.

Set the baud rate to match the code $$

You should see the prompt: 'Enter a calculation $($e$.$g$.,12+8,20/5)$:$\text{'}$

Step $4$: Interact with the Calculator

Input Example: Type in the Serial Monitor and press Enter.

The Arduino will calculate and return: $.$

Input Example: Type in the Serial Monitor and press Enter.

The Arduino will return: $.$

Input Example: Type $\})$ and press Enter.

The Arduino will return: $.$

& Project Expansion:

$>$ Support for Negative Numbers: Extend the calculator to handle negative numbers by checking for a $\text{'}-\text{'}$ sign before the numbers.

$>$ Scientific Calculator: Add more functions like square roots, powers, etc.

Multiple Digit Support: The current code supports multi$-$digit numbers, but you can improve number parsing to handle decimal values.