Raspberry Pi For Beginners - 2022 Complete Course - Activity 11 - Choose Which LED to Power On from a Web Browser

This tutorial guides you through creating a web application on a Raspberry Pi using Flask and GPIO. It covers setting up a basic Flask app, defining URL structures for controlling LEDs, and writing a function to handle LED pin and state parameters. The video concludes with a challenge to initialize and validate LED pins, ensuring they are set to GPIO output and validating user input against a predefined list of pins.

What is the primary purpose of using Flask in a Raspberry Pi application?

• To manage file storage

• To develop web applications

• To enhance network security

• To create a graphical user interface

In the URL structure for controlling LEDs, what does the 'state' parameter represent?

• The on/off status of the LED

• The color of the LED

• The type of LED being used

• The brightness level of the LED

Which of the following is NOT a valid LED pin number in this course?

• 25

• 22

• 27

• 17

What is the first step in initializing LED pins for GPIO output?

• Set the pins to GPIO output

• Set the pins to GPIO input

• Set the pins to analog mode

• Set the pins to PWM mode

Why is it important to validate the LED pin and state from the URL?

• To ensure the LED blinks at the correct rate

• To prevent unauthorized access to the Raspberry Pi

• To ensure the correct LED is controlled and prevent errors

• To save power by turning off unused LEDs