User manual

Fig. 10.1: A single LED at GPIO port 4.

Connect an LED via a series resistor to the GPIO port 4. The programme ledtk01.py will turn the lights on.

import RPi.GPIO as GPIO

from Tkinter import *

LED = 4; GPIO.setmode(GPIO.BCM); GPIO.setup(LED,GPIO.OUT)

def LedOn():

GPIO.output(LED,True)

def LedOff():

GPIO.output(LED,True)

root = Tk(); root.title("LED")

Label(root,

text=”Please click a button to turn the LED on

or off").pack()

Button(root, text=”On", command=LedOn).pack(side=LEFT)