應高師大跨藝所潘老師邀請機電整合工作坊簡報CPB+PMSA003+SGP003應用程式設計

1. 高師大跨領域藝術研究所
Coding with
CircuitPython@CPB
主講者：曾令燊

2. 大綱
準備材料
佈線圖
CircuitPython簡介、安裝、實作
Q & A
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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
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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
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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
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7. Installing Mu Editor
 Download Mu from https://codewith.mu
 Click [Download] -- Windows 64-bit
 Using Mu
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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
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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…
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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
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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()
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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
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14. 你(妳)成功了嗎?!
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15. Q & A
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