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
230
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
48
Live Highlights in BBC iPlayer
bennuttall
0
21
Rapid prototyping in BBC News with Python and AWS
bennuttall
0
89
Rapid prototyping in BBC News with Python and AWS
bennuttall
0
44
Running a Python Package Index for Raspberry Pi
bennuttall
0
56
From Acorns to Raspberries
bennuttall
0
36
Innovation in the newsroom
bennuttall
0
51
Innovation in the newsroom - MOS Running Order Manager
bennuttall
0
100
How to market your open source project
bennuttall
0
140
Other Decks in Programming
See All in Programming
Netty Chicago Java User Group 2024-04-17
sullis
0
170
Prepare for Jakarta EE 11 - Performance and Developer Productivity
ivargrimstad
0
780
Behind VS Code Extensions for JavaScript / TypeScript Linnting and Formatting
unvalley
5
920
Node.js v22 で変わること
yosuke_furukawa
PRO
9
3.4k
サイコロで理解する統計的仮説検定の考え方
tatamiya
4
930
Ruby GitHub Packages
bkuhlmann
0
630
GraphQLサーバの構成要素を整理する #ハッカー鮨 #tsukijigraphql / graphql server technology selection
izumin5210
4
840
#phpcon_odawara オープン・クローズドなテストフィクスチャを求めて / open closed test fixtures
77web
3
230
コーンフレークから始める モデリング会話入門
ogurotakayuki
0
370
Elm 0.19.0 Changes
bkuhlmann
0
490
Goのエラースタックトレースの歴史と今後
sonatard
8
1.4k
Kotlin Multiplatform at Stable and Beyond (Android Makers 2024)
zsmb
0
240
Featured
See All Featured
Build your cross-platform service in a week with App Engine
jlugia
225
17k
The Cost Of JavaScript in 2023
addyosmani
16
3.9k
Build The Right Thing And Hit Your Dates
maggiecrowley
24
2k
Intergalactic Javascript Robots from Outer Space
tanoku
266
26k
For a Future-Friendly Web
brad_frost
172
9k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
659
120k
Being A Developer After 40
akosma
57
580k
Stop Working from a Prison Cell
hatefulcrawdad
266
19k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
34
8.9k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
30
6k
Building Effective Engineering Teams - LeadDev
addyosmani
28
1.8k
How To Stay Up To Date on Web Technology
chriscoyier
782
250k
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 –
[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
The MagPi
The MagPi
Physical computing with GPIO Zero Ben Nuttall Raspberry Pi Foundation
UK Charity 1129409