2018Dec Buffalo Python Meetup

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Tim Poulsen Software Engineer R&D Team ACV Labs RASPBERRY PI Overview & Examples Board components Basic setup Python dev Libraries Resources https://github.com/skypanther/PiLit https://www.timpoulsen.com/2018/pi-birdcam.html Camera controller board PyImageSearch blog www.pyimagesearch.com/2015/05/25/basic-motion-detection-and- tracking-with-python-and-opencv/ PI 3B+ Micro SD slot (back side) Power in (micro-USB) HDMI GPIO, I2C, serial CSI camera Stereo audio out Broadcom BCM2837B0, Cortex-A53 (ARMv8) 64-bit SoC @ 1.4GHz 1GB LPDDR2 SDRAM 2.4GHz and 5GHz IEEE Gigabit 802.11.b/g/n/ac 4 x USB 2.0 Ethernet Bluetooth 4.2, BLE OS OPTIONS • Raspbian (customized Debian distro) • NOOBs - an installer, not an OS • Third-party provided Ubuntu, Windows 10 IoT Core, RISC OS, etc. OS SETUP • Download OS “image” .img ﬁle • Copy to SD card • Insert in Pi and boot Etcher app - https://www.balena.io/etcher/ DEV ENVIRONMENT • Python 2.x / 3.x • Ruby • C • Wolfram language • C++ • SonicPi • Java • Git • Scratch IDEs Pre-installed: Installable: • Thonny (Python) • VS Code - https:// • Geany (multiple) code.headmelted.com/ • BlueJ (Java) • Spyder • Greenfoot (Java) • Ninja-IDE • Mathematica • • Node-RED Lazarus • Scratch • lots more… PYTHON LIBRARIES Pre-installed: Installable: • Any Python-only library • RPi.GPIO • Or, any that will compile for • GPIO Zero ARM • www.piwheels.org - • PiCamera precompiled packages • e.g. OpenCV, Tensorﬂow, WiringPi, etc. GPIO BASICS from gpiozero import LED from time import sleep red = LED(17) while True: red.on() sleep(1) red.off() sleep(1) GPIO / I2C / SERIAL https://pinout.xyz/ SERIAL OVER USB import serial # open serial port ser = serial.Serial('/dev/ttyUSB0') # write a string ser.write(b'hello') # close port ser.close() PICAMERA from picamera import PiCamera from time import sleep camera = PiCamera() camera.resolution = (1024, 768) camera.start_preview() # Camera warm-up time sleep(2) camera.capture('foo.jpg') THANKS! • timpoulsen.com • github.com/skypanther • @skypanther • www.linkedin.com/in/timpoulsen.

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