Coding with CircuitPython@CPB
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This document provides an overview of a CircuitPython coding workshop that will teach participants how to code with the CircuitPython programming language on an Adafruit Circuit Playground Bluefruit microcontroller board. The workshop will cover preparing necessary materials, wiring diagrams, an introduction to CircuitPython including installation and examples, and a Q&A session. Specific materials that will be used include an Adafruit Circuit Playground Bluefruit board, SGP30 and PMSA003 air quality sensors, batteries, breadboards, and cables. The document outlines the installation process for CircuitPython and the Mu editor, and provides code examples for blinking an LED, reading sensor data, and using the NeoPixel LEDs and audio output. It emphasizes simplifying code by moving
![Installing Mu Editor
Download Mu from https://codewith.mu
Click [Download] -- Windows 64-bit
Using Mu
7](https://image.slidesharecdn.com/cpb20201015-201018144829/85/Coding-with-CircuitPython-CPB-7-320.jpg)
![CircuitPython(SGP30+PMSA003+Audio)
實作-1
""" Example for using the SGP30 and PM25 with CircuitPython
and the Adafruit library """
import digitalio
import busio
import adafruit_sgp30
import board
import adafruit_pm25
from tool import show_SGP, show_SGP_baseline # for SGP30
from tool import show_PM25 # for PMSA003
from tool import color_chase_1 # for NeoPixel
from tool import play_file # for AudioOut
# 設定 LED 顏色
RED = (255, 0, 0)
GREEN = (0, 255, 0)
OFF = (0, 0, 0)
i2c_bus = busio.I2C(board.SCL, board.SDA, frequency=100000)
# Create library object on I2C port
sgp30 = adafruit_sgp30.Adafruit_SGP30(i2c_bus)
print("SGP30 serial #", [hex(i) for i in sgp30.serial])
sgp30.iaq_init()
# sgp30.set_iaq_baseline(co2eq_base, tvoc_base)
# elapsed_sec = 0
reset_pin = None
uart = busio.UART(board.TX, board.RX, baudrate=9600)
pm25 = adafruit_pm25.PM25_UART(uart, reset_pin)
# Enable the speaker
spkrenable = digitalio.DigitalInOut(board.SPEAKER_ENABLE)
spkrenable.direction = digitalio.Direction.OUTPUT
spkrenable.value = True
# Make the 2 input buttons
11](https://image.slidesharecdn.com/cpb20201015-201018144829/85/Coding-with-CircuitPython-CPB-11-320.jpg)
![CircuitPython(SGP30+PMSA003)實作-2
# Tools
import time
import board
import neopixel
dup = 37 # hyphen
# include audio libraries
try:
from audiocore import WaveFile
except ImportError:
from audioio import WaveFile
try:
from audioio import AudioOut
except ImportError:
try:
from audiopwmio import PWMAudioOut as AudioOut
except ImportError:
pass # not always supported by every board!
pixels = neopixel.NeoPixel(
board.NEOPIXEL,
10,
brightness=0.2,
auto_write=False
)
# LED 全亮
def color_chase_all(color, wait):
for i in range(10):
pixels[i] = color
time.sleep(wait)
pixels.show()
12](https://image.slidesharecdn.com/cpb20201015-201018144829/85/Coding-with-CircuitPython-CPB-12-320.jpg)
Coding with CircuitPython@CPB
- 3. 準備材料 Adafruit Circuit Playground Bluefruit Microcontroller Board Adafruit SGP30 Air Quality Sensor Breakout-VOC、eCO2 PLANTOWER PMSA003 Laser PM2.5 Air Quality Sensor (含G7專用轉接板與連接 線--8pin 1.25mm 轉 2.54mm) Lithium Ion Polymer Battery - 3.7V 2000mAh(JST connector) or MB102 Breadboard Power Supply Module 3.3V/5V Breadboard Dupont Line Alligator-clip USB cable 3
- 4. 佈線圖4
- 5. CircuitPython簡介 CircuitPython is a programming language designed to simplify experimenting and learning to program on low-cost microcontroller boards. CircuitPython is based on Python Advantage: Running quickly Easily update your code Serial console and REPL 5
- 6. CircuitPython安裝 Follow the step from https://learn.adafruit.com/adafruit-circuit-playground- bluefruit/circuitpython Download the latest UF2 file -- CircuitPython 6.0.0-beta.2 Double-click the small RESET button in the middle of the CPB Drag the adafruit_circuitpython_xxx-6.0.0-xxx.uf2 file to CPLAYBTBOOT Download the latest library bundle file -- Bundle Version 6.x Copy the following folders and files from the bundle lib folder to the lib folder on your CIRCUITPY drive 6
- 7. Installing Mu Editor Download Mu from https://codewith.mu Click [Download] -- Windows 64-bit Using Mu 7
- 8. CircuitPython實作 Blinking the D13 LED -- https://learn.adafruit.com/adafruit-circuit-playground- bluefruit/creating-and-editing-code Copy Code Paste the code into Mu editor Save as code.py on your CIRCUITPY drive Connecting to the Serial Console – print("Hello, world!") The REPL Press any key to enter the REPL Use Ctrl+D to reload Press Ctrl+C to interrupt CircuitPython Playground: https://learn.adafruit.com/adafruit-circuit-playground- bluefruit/circuitpython-playground 8
- 9. CircuitPython Essentials https://learn.adafruit.com/circuitpython-essentials/circuitpython-essentials 工欲善其事，必先利其器…一步一腳印… 9
- 10. 10
- 11. CircuitPython(SGP30+PMSA003+Audio) 實作-1 """ Example for using the SGP30 and PM25 with CircuitPython and the Adafruit library """ import digitalio import busio import adafruit_sgp30 import board import adafruit_pm25 from tool import show_SGP, show_SGP_baseline # for SGP30 from tool import show_PM25 # for PMSA003 from tool import color_chase_1 # for NeoPixel from tool import play_file # for AudioOut # 設定 LED 顏色 RED = (255, 0, 0) GREEN = (0, 255, 0) OFF = (0, 0, 0) i2c_bus = busio.I2C(board.SCL, board.SDA, frequency=100000) # Create library object on I2C port sgp30 = adafruit_sgp30.Adafruit_SGP30(i2c_bus) print("SGP30 serial #", [hex(i) for i in sgp30.serial]) sgp30.iaq_init() # sgp30.set_iaq_baseline(co2eq_base, tvoc_base) # elapsed_sec = 0 reset_pin = None uart = busio.UART(board.TX, board.RX, baudrate=9600) pm25 = adafruit_pm25.PM25_UART(uart, reset_pin) # Enable the speaker spkrenable = digitalio.DigitalInOut(board.SPEAKER_ENABLE) spkrenable.direction = digitalio.Direction.OUTPUT spkrenable.value = True # Make the 2 input buttons 11
- 12. CircuitPython(SGP30+PMSA003)實作-2 # Tools import time import board import neopixel dup = 37 # hyphen # include audio libraries try: from audiocore import WaveFile except ImportError: from audioio import WaveFile try: from audioio import AudioOut except ImportError: try: from audiopwmio import PWMAudioOut as AudioOut except ImportError: pass # not always supported by every board! pixels = neopixel.NeoPixel( board.NEOPIXEL, 10, brightness=0.2, auto_write=False ) # LED 全亮 def color_chase_all(color, wait): for i in range(10): pixels[i] = color time.sleep(wait) pixels.show() 12
- 13. CircuitPython(SGP30+PMSA003)實作-3 善用工具： 簡化程式：將重複的程式碼移至 tool.py 並製作成 function 供主程式 code.py 呼叫， 類似積木的使用方式 13
- 14. 你(妳)成功了嗎?! 14
- 15. Q & A 15