ModMyPi LTD | GPIO & Python (3/9)

On this challenge you’ll learn to make a LED blink!

Issues you will want:

Raspberry Pi + SD Card

Keyboard + Mouse

Monitor + HDMI Cable

Energy Provide

Breadboard

1x Pink LED

1x Blue LED

2x 330Ω Resistor

3x M/F Jumper Wire

Conditions:

Newest model of Rasbian put in in your SD Card
Raspberry Pi setup with a keyboard, mouse and monitor

1. Change the present listing to our gpio_python_code listing:

cd gpio_python_code

2. Begin by making a file for our blink led script

contact 3_blink.py

3. Create a file for our blink led perpetually script

contact 3_blink_forever.py

4 . Edit the 3_blink.py script utilizing nano 3_blink.py add the next code:

#!/usr/bin/python

from time import sleep # import the time perform from the sleep library
import RPi.GPIO as GPIO # import our GPIO library

GPIO.setmode(GPIO.BCM) # set the board numbering system to BCM

# setup our output pins
GPIO.setup(17,GPIO.OUT)
GPIO.setup(27,GPIO.OUT)

# Flip LEDs on
print “lights on”
GPIO.output(17,GPIO.HIGH)
GPIO.output(27,GPIO.HIGH)
sleep(1) # sleep for 1 second

# Flip LEDs off
print “lights off”
GPIO.output(17,GPIO.LOW)
GPIO.output(27,GPIO.LOW)
sleep(1)

# Flip LEDs on
print “lights on”
GPIO.output(17,GPIO.HIGH)
GPIO.output(27,GPIO.HIGH)
sleep(1)

# Flip LEDs off
print “lights off”
GPIO.output(17,GPIO.LOW)
GPIO.output(27,GPIO.LOW)
GPIO.cleanup() # the clean-up perform will reset all of the configurations made on this script. It will cease the warnings we received from the tutorial 2.

5. Edit the 3_blink_forever.py script utilizing nano 3_blink_forever.py add the next code:

#!/usr/bin/python

# import libraries
from time import sleep
import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM) # set pin numbering system to bcm

# setup our output pins
GPIO.setup(17,GPIO.OUT)
GPIO.setup(27,GPIO.OUT)

# create an infinite loop
whereas True:
# flip leds on
print “lights on”
GPIO.output(17,GPIO.HIGH)
GPIO.output(27,GPIO.HIGH)

sleep(1) # sleep 1 second

# flip leds off
print “lights off”
GPIO.output(17,GPIO.LOW)
GPIO.output(27,GPIO.LOW)
sleep(1) # sleep 1 second

6. Execute your 3_blink.py script

sudo python 3_blink.py

7. Execute your 3_blink_forever.py script

sudo python 3_blink_forever.py

8. To cease your 3_blink_forever.py script, merely press ctrl+c

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