Python + bottle@Raspberry Pi: Web based GPIO control

This example show how to program in Python with bottle on Raspberry Pi, to implement web base GPIO control.

bottle is a Python web server library. To install bottle on Raspberry Pi, enter the command:
$ sudo apt-get install python-bottle


Create webled.py

from bottle import route, run
import RPi.GPIO as GPIO

host = '192.168.1.105'

pinButton = 17
pinLed = 18
GPIO.setmode(GPIO.BCM)
# pin 17 as input with pull-up resistor
GPIO.setup(pinButton, GPIO.IN, pull_up_down=GPIO.PUD_UP)
# pin 18 as output
GPIO.setup(pinLed, GPIO.OUT)

LedState = False

def read_button():
    if GPIO.input(pinButton):
        return 'Released'
    else:
        return 'Pressed'

def update_led():
    GPIO.output(pinLed, LedState)
    
def toggleLed():
    global LedState
    LedState = not LedState
    
@route('/')
@route('/')
def index(arg=""):
    if arg == "toggle":
        toggleLed()
        
    update_led()
    
    response = "\n"
    response += "\n"
    response += "\n"
    
    response += "Button: " + read_button() +"\n"
    response += "

\n"
    response += "\n"
    response += "\n"
    return response
    
run(host=host, port=80)

Run it:
$ sudo python webled.py



Related:
- Web control to display on Pi connected LCD Module, with Python and bottle