Python Picamera with GPIO Zero - Picademy USA #2

Using Python Picamera and GPIO Zero

Transcript

1. Python Picamera featuring GPIO Zero Introducing the camera board and Python module
2. Raspberry Pi camera module - 5Mpx - Full HD - Photo & video - Command line - Python module - Infra-red camera
3. What you will learn • How to connect the camera module • How to use Python to take pictures • How to add physical components to your your project • How to use loops to repeat commands
4. Connect the camera
5. Add a GPIO Button
6. Boot the Pi and open Python 3
7. IDLE Python Shell >>> from picamera import PiCamera >>> from gpiozero import Button >>> camera = PiCamera() >>> button = Button(17) >>> button.when_pressed = camera.start_preview >>> button.when_released = camera.stop_preview
8. Open a new file • File > New File • File > Save • Save as camera.py
9. Take a selfie from picamera import PiCamera from time import sleep camera = PiCamera() camera.start_preview() sleep(3) camera.capture("/home/pi/image.jpg") camera.stop_preview() Save and run: Ctrl + S F5
10. Add GPIO Button code from picamera import PiCamera from gpiozero import Button from time import sleep camera = PiCamera() button = Button(17) camera.start_preview() button.wait_for_press() sleep(3) camera.capture("/home/pi/button.jpg") camera.stop_preview() Save as button.py
11. Add a loop camera.start_preview() for i in range(5): button.wait_for_press() sleep(3) camera.capture("/home/pi/button%s.jpg" % i) camera.stop_preview() Save as loop.py
12. What's the difference? for i in range(5): button.wait_for_press() sleep(3) camera.capture("/home/pi/button%s.jpg" % i) button.wait_for_press() for i in range(5): sleep(3) camera.capture("/home/pi/button%s.jpg" % i)
13. Connect a PIR Motion Sensor
14. Button Motion Sensor? → from picamera import PiCamera from gpiozero import Button from time import sleep camera = PiCamera() button = Button(17) camera.start_preview() button.wait_for_press() sleep(3) camera.capture("/home/pi/button.jpg") camera.stop_preview() Open button.py Save as pir.py
15. Button Motion Sensor → from picamera import PiCamera from gpiozero import Button from time import sleep camera = PiCamera() button = Button(17) camera.start_preview() button.wait_for_press() sleep(3) camera.capture("/home/pi/button.jpg") camera.stop_preview() from picamera import PiCamera from gpiozero import MotionSensor from time import sleep camera = PiCamera() sensor = MotionSensor(4) camera.start_preview() sensor.wait_for_motion() sleep(3) camera.capture("/home/pi/pir.jpg") camera.stop_preview()
16. Picamera effects
17. Picamera effects camera.start_preview() button.wait_for_press() camera.image_effect = 'negative' sleep(5) camera.capture("/home/pi/negative.jpg") camera.stop_preview() Try more effects: - negative - colorswap - sketch - emboss Save as effect.py
18. Documentation and help guides • picamera.readthedocs.io • gpiozero.readthedocs.io • raspberrypi.org/resources • raspberrypi.org/education/downloads
19. What next? • Time-lapse • Stop motion animation • Wildlife camera
20. What next? • Sensor trigger • Send to social media • Robotics
21. Python Picamera featuring GPIO Zero Introducing the camera board and Python module