“Introduction: Python WebServer With Flask and Raspberry Pi
Let’s create a simple WebServer to control things in your home. There are a lot of ways to do that. For example, on my tutorial: IoT - Controlling a Raspberry Pi Robot Over Internet With HTML and Shell Scripts Only, we have explored how to control a robot over the local network using the LIGHTTPD WebServer. For this project here, we will use FLASK, a very simple and free microframework for Python. With Flask, will be very simple to control Raspberry GPIOs over the internet.
Flask is called a micro framework because it does not require particular tools or libraries. It has no database abstraction layer, form validation, or any other components where pre-existing third-party libraries provide common functions. However, Flask supports extensions that can add application features as if they were implemented in Flask itself.
On this tutorial, we will use a Raspberry Pi as a local Web Server, where we will control via a simple webpage, 3 of its GPIOs programmed as outputs (acting as actuators) and monitor 2 of its GPIOs, programmed as inputs (sensors).”