Controlling GPIO through web interface in Raspberry Pi - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is GPIO on a Raspberry Pi?

GPIO stands for General Purpose Input/Output. It is a set of pins on the Raspberry Pi that can be used to control electronic components like LEDs, buttons, and sensors.

beginner

Why use a web interface to control GPIO pins?

A web interface lets you control GPIO pins from any device with a browser, like a phone or computer, without needing to connect directly to the Raspberry Pi.

beginner

Which Python library is commonly used to control GPIO pins on Raspberry Pi?

The RPi.GPIO library is commonly used in Python to control GPIO pins on the Raspberry Pi.

intermediate

What role does Flask play in controlling GPIO through a web interface?

Flask is a lightweight web framework in Python that helps create web pages and handle user requests. It can be used to build the web interface that controls GPIO pins.

intermediate

How do you safely control GPIO pins from a web interface?

You should validate user inputs, avoid running the web server as root, and use proper hardware connections like resistors to protect the Raspberry Pi and connected devices.

What does GPIO stand for on a Raspberry Pi?

A General Purpose Input/Output

B General Program Input/Output

C Graphical Processing Input/Output

D General Purpose Internet Output

GPIO means General Purpose Input/Output, which are pins used to connect and control hardware.

Which Python library is typically used to control Raspberry Pi GPIO pins?

A NumPy

B Flask

C Django

D RPi.GPIO

RPi.GPIO is the standard Python library for controlling GPIO pins on Raspberry Pi.

What is the main purpose of using Flask in GPIO web control?

A To manage database connections

B To control hardware directly

C To create a web server for user interaction

D To handle image processing

Flask creates a web server that lets users interact with GPIO pins through a browser.

Which of these is a good safety practice when controlling GPIO via web?

A Run the web server as root user

B Use resistors to protect hardware

C Connect pins directly without protection

D Ignore user input validation

Using resistors helps protect the Raspberry Pi and connected devices from damage.

How can you access the GPIO control interface remotely?

A Through a web browser on any device

B Only via SSH terminal

C Using a connected keyboard only

D By connecting a monitor directly

A web interface allows remote control from any device with a browser.

Explain how you can set up a simple web interface to turn an LED on and off using Raspberry Pi GPIO pins.

Think about how the web server and GPIO code work together.

What are important safety considerations when controlling GPIO pins through a web interface?

Consider both software and hardware safety.