Error handling in embedded projects in Arduino - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main goal of error handling in embedded projects?

The main goal is to detect and respond to problems in the system to keep it running safely and reliably.

beginner

Name two common methods to handle errors in Arduino projects.

1. Using return codes to check if a function succeeded.<br>2. Using flags or status variables to indicate errors.

intermediate

Why is it important to keep error handling code simple in embedded systems?

Because embedded systems have limited memory and processing power, simple error handling avoids slowing down or crashing the system.

intermediate

What role does the watchdog timer play in error handling?

A watchdog timer resets the system if it stops responding, helping recover from unexpected errors or freezes.

beginner

How can you notify a user about an error in an Arduino project?

You can use LEDs to blink error codes, send messages over serial, or display information on an LCD screen.

Which of these is NOT a typical way to handle errors in embedded projects?

A Using return codes

B Setting error flags

C Throwing exceptions like in desktop apps

D Using a watchdog timer

Embedded projects usually avoid exceptions because they need simple, predictable error handling.

What does a watchdog timer do?

A Saves data to memory

B Resets the system if it freezes

C Increases processing speed

D Detects sensor errors

The watchdog timer resets the system if it stops responding to keep it running.

Why should error handling code be simple in embedded systems?

A To save memory and processing power

B To make the code look nice

C Because errors never happen

D To confuse the user

Embedded systems have limited resources, so simple error handling helps keep the system stable.

Which method can be used to inform users about errors in Arduino projects?

A Playing music

B Increasing CPU speed

C Changing the device color

D Blinking LEDs

Blinking LEDs is a common and simple way to show error codes to users.

What is a common way to check if a function worked correctly in embedded code?

A Return a status code

B Throw an exception

C Ignore errors

D Restart the computer

Returning a status code lets the program know if the function succeeded or failed.

Explain why error handling is important in embedded projects and describe two simple ways to implement it.

Think about system safety and simple checks.

Describe how a watchdog timer helps in error handling and what happens when it triggers.

Imagine the system stops working and needs a restart.