Code for guide "Dotstar Matrix Necklace with Bluetooth and Touch"

Code for the new guide "Dotstar Matrix Necklace with Bluetooth and Touch"

Author: TheKitty

ItsyBitsy_DotStar_Necklace/code.py

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+import time
+import adafruit_dotstar
+import board
+import random
+import touchio
+from adafruit_pixel_framebuf import PixelFramebuffer
+from adafruit_led_animation.animation.rainbowchase import RainbowChase
+from adafruit_led_animation.animation.rainbowcomet import RainbowComet
+from adafruit_led_animation.animation.chase import Chase
+from adafruit_led_animation.color import PINK
+
+from adafruit_ble import BLERadio
+from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
+from adafruit_ble.services.nordic import UARTService
+from adafruit_bluefruit_connect.packet import Packet
+from adafruit_bluefruit_connect.color_packet import ColorPacket
+from adafruit_bluefruit_connect.button_packet import ButtonPacket
+
+################################################################################
+# Customize variables
+
+# Set capacitive touch pin
+TOUCH_PIN = board.D11
+
+# These are the pixels covered by the brass cap touch
+# We will try to avoid using these pixels in the "twinkle" default animation
+COVERED_PIXELS = [40,41,42,48,49,50,56,57,58]
+
+# Adjust this higher if touch is too sensitive
+TOUCH_THRESHOLD = 3000
+
+# Adjust SCROLL_TEXT_COLOR_CHANGE_WAIT lower to make the color changes for
+# the text scroll animation faster
+SCROLL_TEXT_COLOR_CHANGE_WAIT = 5
+
+# Change this text that will be displayed when tapping 2 on the
+# Bluefruit app control pad (after connecting on your phone)
+SCROLL_TEXT_CUSTOM_WORD = "hello world"
+
+# Increase number to slow down scrolling
+SCROLL_TEXT_WAIT = 0.05
+
+# How bright each pixel in the default twinkling animation will be
+TWINKLE_BRIGHTNESS = 0.1
+
+###############################################################################
+# Initialize hardware
+
+touch_pad = TOUCH_PIN
+touch = touchio.TouchIn(touch_pad)
+touch.threshold = TOUCH_THRESHOLD
+
+ble = BLERadio()
+uart_service = UARTService()
+advertisement = ProvideServicesAdvertisement(uart_service)
+
+# Colors
+YELLOW = (255, 150, 0)
+TEAL = (0, 255, 120)
+CYAN = (0, 255, 255)
+PURPLE = (180, 0, 255)
+TWINKLEY = (255, 255, 255)
+OFF = (0, 0, 0)
+
+# Setup Dotstar grid and pixel framebuffer for fancy animations
+pixel_width = 8
+pixel_height = 8
+num_pixels = pixel_width * pixel_height
+pixels = adafruit_dotstar.DotStar(board.A1, board.A2, num_pixels, auto_write=False, brightness=0.1)
+pixel_framebuf = PixelFramebuffer(
+    pixels,
+    pixel_width,
+    pixel_height,
+    rotation=1,
+    alternating=False,
+    reverse_x=True
+)
+# Fancy animations from https://learn.adafruit.com/circuitpython-led-animations
+rainbow_chase = RainbowChase(pixels, speed=0.1, size=3, spacing=6, step=8)
+chase = Chase(pixels, speed=0.1, color=CYAN, size=3, spacing=6)
+rainbow_comet = RainbowComet(pixels, speed=0.1, tail_length=5, bounce=True, colorwheel_offset=170)
+
+
+def scroll_framebuf_neg_x(word, color, shift_x, shift_y):
+    pixel_framebuf.fill(0)
+    color_int = int('0x%02x%02x%02x' % color, 16)
+
+    # negate x so that the word can be shown from left to right
+    pixel_framebuf.text(word, -shift_x, shift_y, color_int)
+    pixel_framebuf.display()
+    time.sleep(SCROLL_TEXT_WAIT)
+
+def scroll_text(packet, word):
+    # scroll through entire length of string.
+    # each letter is always 5 pixels wide, plus 1 space per letter
+    scroll_len = (len(word) * 5) + len(word)
+    color_list = [CYAN, TWINKLEY, PINK, PURPLE, YELLOW]
+
+    color_i = 0
+    color_wait_tick = 0
+    # start the scroll from off the grid at -pixel_width
+    for x_pos in range(-pixel_width, scroll_len):
+        # detect touch
+        if touch.value:
+            pixel_framebuf.fill(0)
+            pixel_framebuf.display()
+            return;
+
+        # detect new packet
+        if isinstance(packet, ButtonPacket) and packet.pressed:
+            return;
+
+        color = color_list[color_i]
+        scroll_framebuf_neg_x(word, color, x_pos, 0)
+
+        # Only change colors after SCROLL_TEXT_COLOR_CHANGE_WAIT
+        color_wait_tick = color_wait_tick + 1
+        if color_wait_tick == SCROLL_TEXT_COLOR_CHANGE_WAIT:
+            color_i = color_i + 1
+            color_wait_tick = 0
+
+        if color_i == len(color_list):
+            color_i=0
+
+    # wait a bit before scrolling again
+    time.sleep(.5)
+
+# Manually chosen pixels to display "Y"
+# in the proper orientation
+def yes(color):
+    pixels[26] = color
+    pixels[27] = color
+    pixels[28] = color
+    pixels[36] = color
+    pixels[44] = color
+    pixels[21] = color
+    pixels.show()
+    time.sleep(0.1)
+    pixels.fill(0)
+
+# Manually chosen pixels to display "N"
+# in the proper orientation
+def no(color):
+    pixels[26] = color
+    pixels[19] = color
+    pixels[12] = color
+    pixels[27] = color
+    pixels[28] = color
+    pixels[29] = color
+    pixels[30] = color
+    pixels[37] = color
+    pixels[44] = color
+    pixels.show()
+    time.sleep(0.1)
+    pixels.fill(0)
+
+def yes_or_no():
+    pixels.fill(0)
+    print(touch.raw_value)
+    value = 0
+    pick=0
+
+    pick = random.randint(0,64)
+    time.sleep(0.1)
+
+    if pick % 2:
+        print('picked yes!');
+        yes(PINK)
+        time.sleep(1)
+    else:
+        print('picked no!');
+        no(TEAL)
+        time.sleep(1)
+
+
+def twinkle_show():
+    pixels.brightness = TWINKLE_BRIGHTNESS
+    pixels.show()
+    time.sleep(.1)
+    if touch.value:
+        return;
+
+def twinkle():
+    # randomly choose 3 pixels
+    spark1 = random.randint(0, num_pixels-1)
+    spark2 = random.randint(0, num_pixels-1)
+    spark3 = random.randint(0, num_pixels-1)
+
+    # make sure that none of the chosen pixels are covered
+    while spark1 in COVERED_PIXELS:
+        spark1 = random.randint(0, num_pixels-1)
+    while spark2 in COVERED_PIXELS:
+        spark2 = random.randint(0, num_pixels-1)
+    while spark3 in COVERED_PIXELS:
+        spark3 = random.randint(0, num_pixels-1)
+
+    # Control when chosen pixels turn on for dazzling effect
+    pixels[spark1] = TWINKLEY
+    pixels[spark2] = OFF
+    pixels[spark3] = OFF
+    twinkle_show()
+    pixels[spark1] = TWINKLEY
+    pixels[spark2] = TWINKLEY
+    pixels[spark3] = OFF
+    twinkle_show()
+    pixels[spark1] = TWINKLEY
+    pixels[spark2] = TWINKLEY
+    pixels[spark3] = TWINKLEY
+    twinkle_show()
+    pixels[spark1] = OFF
+    pixels[spark2] = TWINKLEY
+    pixels[spark3] = TWINKLEY
+    twinkle_show()
+    pixels[spark1] = OFF
+    pixels[spark2] = OFF
+    pixels[spark3] = TWINKLEY
+    twinkle_show()
+
+    pixels.fill(OFF)
+    pixels.show()
+    time.sleep(0.6)
+
+# Initial empty state
+state = ""
+
+while True:
+    # Advertise when not connected.
+    ble.start_advertising(advertisement)
+
+    while not ble.connected:
+        if touch.value:
+            yes_or_no()
+        else:
+            twinkle()
+
+    while ble.connected:
+        # Set the state
+        if uart_service.in_waiting:
+            # Packet is arriving.
+            packet = Packet.from_stream(uart_service)
+
+            # set state string based on pressed button from Bluefruit app
+            # and to prevent redundant hits
+            if isinstance(packet, ButtonPacket) and packet.pressed:
+                # UP button pressed
+                if packet.button == ButtonPacket.UP and state != "chase":
+                    state = "chase"
+                # DOWN button
+                elif packet.button == ButtonPacket.DOWN and state != "comet":
+                    state = "comet"
+                # 1 button
+                elif packet.button == '1' and state != "rainbowchase":
+                    state = "rainbowchase"
+                # 2 button
+                elif packet.button == '2' and state != "hello":
+                    state = "hello"
+
+        # Touch is handled as an interrupt state
+        if touch.value:
+            yes_or_no()
+
+        # Act upon the state
+        if state == "chase":
+            chase.animate()
+        elif state == "comet":
+            rainbow_comet.animate()
+        elif state == "rainbowchase":
+            rainbow_chase.animate()
+        elif state == "hello":
+            pixels.fill(0)
+            scroll_text(packet, SCROLL_TEXT_CUSTOM_WORD)
+        else:
+            chase.animate()