Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Physical computing with GPIO Zero - Peterborough Raspberry Jam
Search
Ben Nuttall
November 28, 2015
Programming
0
590
Physical computing with GPIO Zero - Peterborough Raspberry Jam
Getting started with GPIO Zero talk given at Peterborough Raspberry Jam
Ben Nuttall
November 28, 2015
Tweet
Share
More Decks by Ben Nuttall
See All by Ben Nuttall
Numeronyms are obnoxious
bennuttall
0
81
Live Highlights in BBC iPlayer
bennuttall
0
24
Rapid prototyping in BBC News with Python and AWS
bennuttall
0
98
Rapid prototyping in BBC News with Python and AWS
bennuttall
0
55
Running a Python Package Index for Raspberry Pi
bennuttall
0
66
From Acorns to Raspberries
bennuttall
0
45
Innovation in the newsroom
bennuttall
0
57
Innovation in the newsroom - MOS Running Order Manager
bennuttall
0
110
How to market your open source project
bennuttall
0
170
Other Decks in Programming
See All in Programming
ドメイン駆動設計の実践
masuda220
PRO
19
5.2k
【Go言語】ジェネリクス
tomo1227
0
170
유연한 Composable 설계
l2hyunwoo
0
380
Clean Architecture by TypeScript & NestJS
ryounasso
0
150
Javaの現状2024夏 / Java current status 2024 summer
kishida
4
1.4k
Polarsの成長: v0.14からv1.0までの変遷と今後の展望
zerebom
1
350
12年前の『型システム入門』翻訳の思い出話
mame
11
1.2k
ピグパーティにおけるMongoDB CommunityバージョンからAtlasへの移行事例
10969hotaka
0
130
DMMプラットフォームにおけるTiDBの導入から運用まで
pospome
7
3k
しくじり先生 Image Matching Challenge 2024 編
goosehaaan
0
810
iOSアプリでクリップボードにコピーしたことをユーザーに伝えるちょうど良いフィードバックを探す
ski
0
100
Introduction to GitOps
hwchiu
0
110
Featured
See All Featured
Into the Great Unknown - MozCon
thekraken
20
1.3k
Web Components: a chance to create the future
zenorocha
307
41k
Agile that works and the tools we love
rasmusluckow
325
20k
How to Think Like a Performance Engineer
csswizardry
4
590
What's new in Ruby 2.0
geeforr
338
31k
5 minutes of I Can Smell Your CMS
philhawksworth
200
19k
Pencils Down: Stop Designing & Start Developing
hursman
118
11k
The Power of CSS Pseudo Elements
geoffreycrofte
64
5.2k
The Cult of Friendly URLs
andyhume
75
5.9k
Optimising Largest Contentful Paint
csswizardry
18
2.6k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
17
1.5k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
662
120k
Transcript
Physical computing with GPIO Zero Ben Nuttall Raspberry Pi Foundation
UK Charity 1129409
Ben Nuttall • Education Developer Advocate at the Raspberry Pi
Foundation – Software & project development – Learning resources & teacher training – Outreach • Hobbyist turned employee • Based in Cambridge (but from the North) • @ben_nuttall on Twitter
Python – RPi.GPIO import RPi.GPIO as GPIO from time import
sleep GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False) led = 17 GPIO.setup(led, GPIO.OUT) while True: GPIO.output(led, True) sleep(1) GPIO.output(led, False) sleep(1)
Python – GPIO Zero from gpiozero import LED from time
import sleep led = LED(17) while True: led.on() sleep(1) led.off() sleep(1)
LED from gpiozero import LED from time import sleep led
= LED(17) led.on() # on led.off() # off led.toggle() # on>off or off>on led.blink() # flash on/off continuously
LED + Button from gpiozero import LED, Button led =
LED(17) button = Button(3) button.when_pressed = led.on button.when_released = led.off
Source + Values from gpiozero import LED, Button led =
LED(17) button = Button(3) led.source = button.values
LED - PWM from gpiozero import PWMLED from time import
sleep led = PWMLED(17) led.on() # on led.off() # off led.value = 0.5 # half brightness
Motion sensor from gpiozero import LED, MotionSensor led = LED(2)
sensor = MotionSensor(3) sensor.when_motion = led.on sensor.when_no_motion = led.off
Light sensor from gpiozero import LED, LightSensor led = LED(2)
sensor = LightSensor(3) while True: sensor.wait_for_light() print("It's light!") sensor.wait_for_dark() print("It's dark")
Traffic Lights from gpiozero import TrafficLights lights = TrafficLights(9, 10,
11) lights.on() # all on lights.off() # all off lights.red.on() # red on lights.toggle() # swap state of all lights
Traffic Lights sequence lights.green.on() lights.amber.off() lights.red.off() while True: sleep(10) lights.green.off()
lights.amber.on() sleep(1) lights.amber.off() lights.red.on() sleep(10) lights.amber.on() sleep(1) lights.green.on() lights.amber.off() lights.red.off()
TrafficHat from gpiozero import TrafficHat th = TrafficHat() th.lights.red.on() th.lights.amber.on()
th.button.when_pressed = th.on th.button.when_released = th.off
TrafficHat - PWM from gpiozero import TrafficHat th = TrafficHat(pwm=True)
th.lights.red.value = 0.2 th.lights.amber.value = 0.4 th.lights.green.value = 0.8
Push button stop motion from gpiozero import Button from picamera
import PiCamera button = Button(4) with PiCamera() as camera: camera.start_preview() frame = 1 while True: button.wait_for_press() camera.capture('/home/pi/frame%03d.jpg' % frame) frame += 1
Full colour LED from gpiozero import RGBLED led = RGBLED(2,
3, 4) led.red.on() # full red led.color = (1, 0, 1) # purple led.blue = 0.3 # dim the blue value to 0.3 # now (1, 0, 0.3)
Motor from gpiozero import Motor from time import sleep motor
= Motor(forward=17, backward=18) while True: motor.forward() sleep(5) motor.backward() sleep(5)
Robot from gpiozero import Robot from time import sleep robot
= Robot(left=(17, 18), right=(22, 23)) while True: robot.forward() sleep(10) robot.left() sleep(1)
Button controlled Robot from gpiozero import RyanteckRobot, Button robot =
RyanteckRobot() left = Button(26) right = Button(16) fw = Button(21) bw = Button(20) fw.when_pressed = robot.forward fw.when_released = robot.stop left.when_pressed = robot.left left.when_released = robot.stop right.when_pressed = robot.right right.when_released = robot.stop bw.when_pressed = robot.backward bw.when_released = robot.stop
Analogue - potentiometers from gpiozero import MCP3008 pot = MCP3008()
while True: print(pot.value)
Dial up the brightness! from gpiozero import PWMLED, MCP3008 led
= PWMLED(2) pot = MCP3008() while True: led.value = pot.value
Dial up the brightness! from gpiozero import PWMLED, MCP3008 led
= PWMLED(2) pot = MCP3008() led.source = pot.values
Analogue - potentiometers from gpiozero import RGBLED, MCP3008 led =
RGBLED(red=2, green=3, blue=4) red_pot = MCP3008(channel=0) green_pot = MCP3008(channel=1) blue_pot = MCP3008(channel=2) while True: led.red = red_pot.value led.green = green_pot.value led.blue = blue_pot.value
Analogue - potentiometers from gpiozero import RGBLED, MCP3008 led =
RGBLED(red=2, green=3, blue=4) red_pot = MCP3008(channel=0) green_pot = MCP3008(channel=1) blue_pot = MCP3008(channel=2) led.red.source = red_pot.values led.green.source = green_pot.values led.blue.source = blue_pot.values
GPIO Music Box from gpiozero import Button import pygame.mixer from
pygame.mixer import Sound pygame.mixer.init() sound_pins = { 2: Sound("samples/drum_tom_mid_hard.wav"), 3: Sound("samples/drum_cymbal_open.wav"), } buttons = [Button(pin) for pin in sound_pins] for button in buttons: sound = sound_pins[button.pin] button.when_pressed = sound.play
Install GPIO Zero • Pre-installed in Raspbian Jessie since 21
Nov • Update with: sudo aptget update • Install with: sudo aptget install python3gpiozero or: sudo aptget install pythongpiozero
GPIO Zero • www.pythonhosted.org/gpiozero – Installation instructions – Documentation –
Examples • GitHub Issues – Suggestions – Feedback • Contact me –
[email protected]
– @ben_nuttall on Twitter • #gpiozero on Twitter
CamJam EduKit • £5 starter kit (kit 1) • £7
sensors kit (kit 2) • £17 robotics kit (kit 3) • Free worksheets • Very reusable
Raspberry Pi blog
The MagPi
The MagPi
Pi Zero
Conductive paint
Conductive thread
Physical computing with GPIO Zero Ben Nuttall Raspberry Pi Foundation
UK Charity 1129409