Updating Essentials guide to include QT Py.

CircuitPython_Essentials/CircuitPython_AnalogIn.py

@@ -1,4 +1,4 @@
-# CircuitPython AnalogIn Demo
+"""CircuitPython Essentials Analog In example"""
 import time
 import board
 from analogio import AnalogIn

CircuitPython_Essentials/CircuitPython_AnalogOut.py

@@ -1,4 +1,4 @@
-# CircuitPython IO demo - analog output
+"""CircuitPython Analog Out example"""
 import board
 from analogio import AnalogOut
 

CircuitPython_Essentials/CircuitPython_Audio_Out_MP3.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials Audio Out MP3 Example"""
 import board
 import digitalio
 

CircuitPython_Essentials/CircuitPython_Audio_Out_Tone.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials Audio Out tone example"""
 import time
 import array
 import math

CircuitPython_Essentials/CircuitPython_Audio_Out_Wave.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials Audio Out WAV example"""
 import time
 import board
 import digitalio

CircuitPython_Essentials/CircuitPython_CapTouch.py

@@ -1,5 +1,5 @@
+"""CircuitPython Essentials Capacitive Touch example"""
 import time
-
 import board
 import touchio
 

CircuitPython_Essentials/CircuitPython_CapTouch_2Pins.py

@@ -1,8 +1,5 @@
-# CircuitPython Demo - Cap Touch Multiple Pins
-# Example does NOT work with Trinket M0!
-
+"""CircuitPython Essentials Capacitive Touch on two pins example. Does not work on Trinket M0!"""
 import time
-
 import board
 import touchio
 

CircuitPython_Essentials/CircuitPython_Continuous_Servo.py

@@ -1,4 +1,4 @@
-# Continuous Servo Test Program for CircuitPython
+"""CircuitPython Essentials Servo continuous rotation servo example"""
 import time
 import board
 import pulseio

CircuitPython_Essentials/CircuitPython_Digital_In_Out.py

@@ -1,12 +1,15 @@
-# CircuitPython IO demo #1 - General Purpose I/O
+"""CircuitPython Essentials Digital In Out example"""
 import time
 import board
 from digitalio import DigitalInOut, Direction, Pull
 
+# LED setup.
 led = DigitalInOut(board.D13)
+# For QT Py M0. QT Py M0 does not have a D13 LED, so you can connect an external LED instead.
+# led = DigitalInOut(board.SCK)
 led.direction = Direction.OUTPUT
 
-# For Gemma M0, Trinket M0, Metro M0 Express, ItsyBitsy M0 Express, Itsy M4 Express
+# For Gemma M0, Trinket M0, Metro M0 Express, ItsyBitsy M0 Express, Itsy M4 Express, QT Py M0
 switch = DigitalInOut(board.D2)
 # switch = DigitalInOut(board.D5)  # For Feather M0 Express, Feather M4 Express
 # switch = DigitalInOut(board.D7)  # For Circuit Playground Express

CircuitPython_Essentials/CircuitPython_DotStar.py

@@ -1,4 +1,4 @@
-# CircuitPython demo - Dotstar
+"""CircuitPython Essentials DotStar example"""
 import time
 import adafruit_dotstar
 import board
@@ -7,7 +7,7 @@ num_pixels = 30
 pixels = adafruit_dotstar.DotStar(board.A1, board.A2, num_pixels, brightness=0.1, auto_write=False)
 
 
-def wheel(pos):
+def colorwheel(pos):
     # Input a value 0 to 255 to get a color value.
     # The colours are a transition r - g - b - back to r.
     if pos < 0 or pos > 255:
@@ -85,7 +85,7 @@ def rainbow_cycle(wait):
     for j in range(255):
         for i in range(num_pixels):
             rc_index = (i * 256 // num_pixels) + j
-            pixels[i] = wheel(rc_index & 255)
+            pixels[i] = colorwheel(rc_index & 255)
         pixels.show()
         time.sleep(wait)
 

CircuitPython_Essentials/CircuitPython_HID_Keyboard.py

@@ -1,5 +1,4 @@
-# CircuitPython demo - Keyboard emulator
-
+"""CircuitPython Essentials HID Keyboard example"""
 import time
 
 import board
@@ -31,7 +30,10 @@ for pin in keypress_pins:
     key_pin.pull = digitalio.Pull.UP
     key_pin_array.append(key_pin)
 
+# For most CircuitPython boards:
 led = digitalio.DigitalInOut(board.D13)
+# For QT Py M0:
+# led = digitalio.DigitalInOut(board.SCK)
 led.direction = digitalio.Direction.OUTPUT
 
 print("Waiting for key pin...")

CircuitPython_Essentials/CircuitPython_HID_Mouse.py

@@ -1,5 +1,5 @@
+"""CircuitPython Essentials HID Mouse example"""
 import time
-
 import analogio
 import board
 import digitalio

CircuitPython_Essentials/CircuitPython_I2C_Scan.py

@@ -1,5 +1,4 @@
-# CircuitPython demo - I2C scan
-# 
+"""CircuitPython Essentials I2C Scan example"""
 # If you run this and it seems to hang, try manually unlocking
 # your I2C bus from the REPL with
 #  >>> import board 

CircuitPython_Essentials/CircuitPython_I2C_TSL2591.py

@@ -1,9 +1,7 @@
-# CircuitPython Demo - I2C sensor
-
+"""CircuitPython Essentials I2C sensor example using TSL2591"""
 import time
-
-import adafruit_tsl2561
 import board
+import adafruit_tsl2591
 
 i2c = board.I2C()
 
@@ -11,16 +9,15 @@ i2c = board.I2C()
 while not i2c.try_lock():
     pass
 # Print the addresses found once
-print("I2C addresses found:", [hex(device_address)
-                               for device_address in i2c.scan()])
+print("I2C addresses found:", [hex(device_address) for device_address in i2c.scan()])
 
 # Unlock I2C now that we're done scanning.
 i2c.unlock()
 
 # Create library object on our I2C port
-tsl2561 = adafruit_tsl2561.TSL2561(i2c)
+tsl2591 = adafruit_tsl2591.TSL2591(i2c)
 
 # Use the object to print the sensor readings
 while True:
-    print("Lux:", tsl2561.lux)
-    time.sleep(1.0)
+    print("Lux:", tsl2591.lux)
+    time.sleep(0.5)

CircuitPython_Essentials/CircuitPython_Internal_RGB_LED_colors.py

@@ -1,10 +1,11 @@
+"""CircuitPython Essentials Internal RGB LED red, green, blue example"""
 import time
 import board
 
 # For Trinket M0, Gemma M0, ItsyBitsy M0 Express, and ItsyBitsy M4 Express
 import adafruit_dotstar
 led = adafruit_dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1)
-# For Feather M0 Express, Metro M0 Express, Metro M4 Express, and Circuit Playground Express
+# For Feather M0 Express, Metro M0 Express, Metro M4 Express, Circuit Playground Express, QT Py M0
 # import neopixel
 # led = neopixel.NeoPixel(board.NEOPIXEL, 1)
 

CircuitPython_Essentials/CircuitPython_Internal_RGB_LED_rainbow.py

@@ -1,15 +1,16 @@
+"""CircuitPython Essentials Internal RGB LED rainbow example"""
 import time
 import board
 
 # For Trinket M0, Gemma M0, ItsyBitsy M0 Express and ItsyBitsy M4 Express
 import adafruit_dotstar
 led = adafruit_dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1)
-# For Feather M0 Express, Metro M0 Express, Metro M4 Express and Circuit Playground Express
+# For Feather M0 Express, Metro M0 Express, Metro M4 Express, Circuit Playground Express, QT Py M0
 # import neopixel
 # led = neopixel.NeoPixel(board.NEOPIXEL, 1)
 
 
-def wheel(pos):
+def colorwheel(pos):
     # Input a value 0 to 255 to get a color value.
     # The colours are a transition r - g - b - back to r.
     if pos < 0 or pos > 255:
@@ -28,5 +29,5 @@ led.brightness = 0.3
 i = 0
 while True:
     i = (i + 1) % 256  # run from 0 to 255
-    led.fill(wheel(i))
-    time.sleep(0.1)
+    led.fill(colorwheel(i))
+    time.sleep(0.01)

CircuitPython_Essentials/CircuitPython_Logger.py

@@ -1,10 +1,13 @@
+"""CircuitPython Essentials Storage logging example"""
 import time
-
 import board
 import digitalio
 import microcontroller
 
+# For most CircuitPython boards:
 led = digitalio.DigitalInOut(board.D13)
+# For QT Py M0:
+# led = digitalio.DigitalInOut(board.SCK)
 led.switch_to_output()
 
 try:

CircuitPython_Essentials/CircuitPython_Logger_Boot.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials Storage logging boot.py file"""
 import board
 import digitalio
 import storage

CircuitPython_Essentials/CircuitPython_NeoPixel.py

@@ -1,4 +1,4 @@
-# CircuitPython demo - NeoPixel
+"""CircuitPython Essentials NeoPixel example"""
 import time
 import board
 import neopixel

CircuitPython_Essentials/CircuitPython_NeoPixel_RGBW.py

@@ -1,5 +1,4 @@
-# CircuitPython demo - NeoPixel RGBW
-
+"""CircuitPython Essentials NeoPixel RGBW example"""
 import time
 import board
 import neopixel

CircuitPython_Essentials/CircuitPython_PWM.py

@@ -1,8 +1,12 @@
+"""CircuitPython Essentials: PWM with Fixed Frequency example."""
 import time
 import board
 import pulseio
 
+# LED setup for most CircuitPython boards:
 led = pulseio.PWMOut(board.D13, frequency=5000, duty_cycle=0)
+# LED setup for QT Py M0:
+# led = pulseio.PWMOut(board.SCK, frequency=5000, duty_cycle=0)
 
 while True:
     for i in range(100):

CircuitPython_Essentials/CircuitPython_PWM_Piezo.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials PWM with variable frequency piezo example"""
 import time
 import board
 import pulseio

CircuitPython_Essentials/CircuitPython_PWM_Piezo_simpleio.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials PWM piezo simpleio example"""
 import time
 import board
 import simpleio

CircuitPython_Essentials/CircuitPython_Servo.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials Servo standard servo example"""
 import time
 import board
 import pulseio

CircuitPython_Essentials/CircuitPython_UART.py

@@ -1,10 +1,12 @@
-# CircuitPython Demo - USB/Serial echo
-
+"""CircuitPython Essentials UART Serial example"""
 import board
 import busio
 import digitalio
 
+# For most CircuitPython boards:
 led = digitalio.DigitalInOut(board.D13)
+# For QT Py M0:
+# led = digitalio.DigitalInOut(board.SCK)
 led.direction = digitalio.Direction.OUTPUT
 
 uart = busio.UART(board.TX, board.RX, baudrate=9600)

CircuitPython_Essentials/I2C_Test_Script.py

@@ -1,7 +1,9 @@
+"""CircuitPython Essentials I2C possible pin-pair identifying script"""
 import board
 import busio
 from microcontroller import Pin
 
+
 def is_hardware_I2C(scl, sda):
     try:
         p = busio.I2C(scl, sda)

CircuitPython_Essentials/PWM_Test_Script.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials PWM pin identifying script"""
 import board
 import pulseio
 

CircuitPython_Essentials/SPI_Test_Script.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials Hardware SPI pin verification script"""
 import board
 import busio
 

CircuitPython_Essentials/UART_Test_Script.py

@@ -1,3 +1,4 @@
+"""CircuitPython Essentials UART possible pin-pair identifying script"""
 import board
 import busio
 from microcontroller import Pin