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('/<arg>')
def index(arg=""):
if arg == "toggle":
toggleLed()
update_led()
response = "<html>\n"
response += "<body>\n"
response += "<script>\n"
response += "function changed()\n"
response += "{window.location.href='/toggle'}\n"
response += "</script>\n"
response += "Button: " + read_button() +"\n"
response += "<br/><br/>\n"
response += "<input type='button' onClick='changed()' value=' LED '/>\n"
response += "</body></html>\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
