Raspberry Pi For Beginners - 2022 Complete Course - Activity 11 - Solution

This video tutorial guides viewers through creating a new route in a web application to control LEDs using a Raspberry Pi. It covers the initial setup, function implementation for LED control, testing with various inputs, and error handling. The tutorial emphasizes the importance of providing clear user feedback and demonstrates how to manage GPIO pins using Python and Flask.

What is the primary purpose of creating a new route in the web application?

• To create a user login system

• To set up a database connection

• To initialize the Raspberry Pi camera

• To allow users to select an LED to power on or off via URL

Why is it considered good practice to differentiate between setting the mode and state of the pins?

• To ensure compatibility with older Raspberry Pi models

• To make the code more readable and organized

• To reduce the number of lines of code

• To increase the execution speed

What happens if an invalid LED pin number is provided?

• The application will crash

• The LED will still turn on

• An error message 'Wrong GPU number' is returned

• The system will automatically correct the pin number

What should the state value be to turn an LED off?

• 0

• 1

• 3

• 2

What is the expected output when the LED state is set to 1?

• The LED changes color

• The LED turns on

• The LED turns off

• The LED blinks

What is the significance of handling every possibility in the application?

• To enable remote access from any device

• To allow multiple users to control the LEDs simultaneously

• To prevent server errors and provide clear user feedback

• To ensure the application runs faster

What is demonstrated in the final section of the tutorial?

• How to create a mobile app for LED control

• How to connect multiple Raspberry Pis

• How to install Flask on Raspberry Pi

• How to test LED control via a web interface