Program to blink LED

STEP 1:

Open LXTerminal.

Create a file with .py extension

Ex: nano example.py

Nano is a type of editor used to write the code in that file named example.

Type the following code in that file by insert key or by typing letter I on keyboard.

Program:

#! /usr/bin/python

Import time                                         //importing library called time

Import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM)

GPIO.setwarnings(False)

GPIO.setup (17, GPIO.OUT)          //configuring 17^th pin as output

GPIO.setup (27, GPIO.OUT)         //configuring 27^th pin as output

                                                           #Turn LED’S ON

GPIO.output (17, GPIO.HIGH)

GPIO.output (27, GPIO.HIGH)

Time.sleep (1)                                   //sleep for one second

                                                          #Turn LED’S OFF

GPIO.output (17, GPIO.LOW)

GPIO.output (27, GPIO.LOW)

Time.sleep (1)

                                                         # Turn LED’S ON

GPIO.output (17, GPIO.HIGH)

GPIO.output (27, GPIO.HIGH)

Time.sleep (1)

                                                       #Turn LED’S OFF

GPIO.output (17, GPIO.LOW)

GPIO.output (27, GPIO.LOW)

GPIO.cleanup

LED Blinking using WHILE Loop:

#! /usr/bin/python

Import time

Import RPi.GPIO as GPIO

GPIO.setmode (GPIO.BCM)

GPIO.setwarnings (False)

GPIO.setup (17, GPIO.OUT)    //configuring 17^th pin as output

GPIO.setup (27, GPIO.OUT)    //configuring 27^th pin as output

                                                     #while basically means loop foreverIt executes the code if some                                                               condition is true.

WHILE 1:                                   //give one tab in the while loop to overcome the indentation error                                                            while compiling

          GPIO.output (17, GPIO.HIGH)

          GPIO.output (27, GPIO.HIGH)

          Time.sleep (1)

          GPIO.output (17, GPIO.LOW)

          GPIO.output (27, GPIO.LOW)

          Time.sleep (1)

To check the output:Type python example.py in lx-terminal.

Output 1:

Output 2: