Raspberry Pi Flask python web page to control the LED

I was searching for how to control the LED from python web page program. I reached in Flask microframework. http://flask.pocoo.org/

http://en.wikipedia.org/wiki/Flask_%28web_framework%29

Flask is lightweight web application framework written in python and its very much suited for Raspberry Pi board.  Controlling the LED connectioned to GPIO pin 7 is easy ,through the python program written importing Flask.

Steps to control LED connected to Raspberry Pi through WebPage

Step1: install Flask in Raspberry Pi.Follow below steps

apt -get install python-pip

pip install Flask

http://flask.pocoo.org/docs/installation/m

Step2. Connect the LED to the GPIO pin 7 through 470ohm resister

Step3: Writing Programs in Python Flask

First you need to create a python program which actually rendor the html templates stored in the 'templates' directory.

1.Create a folder called 'pythonsites' in your home directory  and you can write gpio.py in that folder as below. Refer the Flask site for example programs 

http://flask.pocoo.org/

route() decorator is used to bind a function to a URL. refer http://flask.pocoo.org/docs/quickstart/#routing

3 functions we have written which are  light_on, light_off  & light_blink

We are going to keep 3 links in the html template ,those are Turn On, Turn Off, LED blink

2.Once you have written this program ,should create a folder called 'templates' and keep our html template.

folder path -

pi@raspberrypi ~/naveen/pythonsites/templates $

html page shows in the browser create as light.html

Web page using Flask:

Run gio.py program using python

sudo python gio.py

connect with port to raspberry as follows ,depends on your raspberrypi IP address.

 http://192.168.1.10:5000/