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 - oggcamp
Search
Ben Nuttall
November 01, 2015
Programming
0
290
Physical computing with GPIO Zero - oggcamp
Presentation given at oggcamp 2015 on the new GPIO Zero Python library
Ben Nuttall
November 01, 2015
Tweet
Share
More Decks by Ben Nuttall
See All by Ben Nuttall
Numeronyms are obnoxious
bennuttall
0
270
Live Highlights in BBC iPlayer
bennuttall
0
78
Rapid prototyping in BBC News with Python and AWS
bennuttall
0
140
Rapid prototyping in BBC News with Python and AWS
bennuttall
0
90
Running a Python Package Index for Raspberry Pi
bennuttall
0
110
From Acorns to Raspberries
bennuttall
0
88
Innovation in the newsroom
bennuttall
0
110
Innovation in the newsroom - MOS Running Order Manager
bennuttall
0
160
How to market your open source project
bennuttall
0
210
Other Decks in Programming
See All in Programming
PHPer's Guide to Daemon Crafting Taming and Summoning
uzulla
2
1.2k
PHPバージョンアップから始めるOSSコントリビュート / how2oss-contribute
dmnlk
1
640
エンジニア未経験が最短で戦力になるためのTips
gokana
0
260
gen_statem - OTP's Unsung Hero
whatyouhide
1
190
Preact、HooksとSignalsの両立 / Preact: Harmonizing Hooks and Signals
ssssota
1
1.2k
OpenTelemetryを活用したObservability入門 / Introduction to Observability with OpenTelemetry
seike460
PRO
1
420
Do Dumb Things
mitsuhiko
0
400
remix + cloudflare workers (DO) docker上でいい感じに開発する
yoshidatomoaki
0
120
Devinのメモリ活用の学びを自社サービスにどう組み込むか?
itarutomy
0
2k
DomainException と Result 型で作る型安全なエラーハンドリング
karszawa
0
870
ミリしらMCP勉強会
watany
4
710
AWSで雰囲気でつくる! VRChatの写真変換ピタゴラスイッチ
anatofuz
0
130
Featured
See All Featured
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
160
15k
Build your cross-platform service in a week with App Engine
jlugia
229
18k
Imperfection Machines: The Place of Print at Facebook
scottboms
267
13k
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
3.8k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
280
13k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
331
21k
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
4
500
The Art of Programming - Codeland 2020
erikaheidi
53
13k
Scaling GitHub
holman
459
140k
A designer walks into a library…
pauljervisheath
205
24k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
656
60k
A Tale of Four Properties
chriscoyier
158
23k
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() def play(pin): sound = sound_pins[pin] print("playing note from pin %s" % pin) sound.play() 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
Analogue - potentiometers from gpiozero import PWMLED, MCP3008 led =
PWMLED(2) pot = MCP3008() led.source = pot.values
GPIO Zero - beta • www.pythonhosted.org/gpiozero – Installation instructions –
Documentation – Examples • GitHub Issues – Suggestions – Feedback • Contact me – ben@raspberrypi.org – @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
The MagPi
The MagPi
Physical computing with GPIO Zero Ben Nuttall Raspberry Pi Foundation
UK Charity 1129409