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kattnikattni
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Merge pull request #957 from kattni/cpb-neopixel-controller
Circuit Playground Bluefruit NeoPixel Controller
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‎Circuit_Playground_Bluefruiit_NeoPixel_Controller/Controller.py

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"""
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Control code for Circuit Playground Bluefruit NeoPixel Animation and Color controller. To be used
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with another Circuit Playground Bluefruit running the receiver code.
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"""
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import time
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from adafruit_circuitplayground.bluefruit import cpb
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from adafruit_ble import BLERadio
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from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
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from adafruit_ble.services.nordic import UARTService
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from adafruit_bluefruit_connect.color_packet import ColorPacket
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from adafruit_bluefruit_connect.button_packet import ButtonPacket
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def scale(value):
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"""Scale a value from acceleration value range to 0-255 (RGB range)"""
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value = abs(value)
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value = max(min(19.6, value), 0)
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return int(value / 19.6 * 255)
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def send_packet(uart_connection_name, packet):
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"""Returns False if no longer connected."""
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try:
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uart_connection_name[UARTService].write(packet.to_bytes())
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except: # pylint: disable=bare-except
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try:
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uart_connection_name.disconnect()
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except: # pylint: disable=bare-except
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pass
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return False
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return True
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ble = BLERadio()
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# Setup for preventing repeated button presses and tracking switch state
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button_a_pressed = False
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button_b_pressed = False
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last_switch_state = None
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uart_connection = None
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# See if any existing connections are providing UARTService.
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if ble.connected:
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for connection in ble.connections:
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if UARTService in connection:
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uart_connection = connection
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break
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while True:
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last_switch_state = None
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if not uart_connection or not uart_connection.connected: # If not connected...
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print("Scanning...")
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for adv in ble.start_scan(ProvideServicesAdvertisement, timeout=5): # Scan...
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if UARTService in adv.services: # If UARTService found...
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print("Found a UARTService advertisement.")
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uart_connection = ble.connect(adv) # Create a UART connection...
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break
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# Stop scanning whether or not we are connected.
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ble.stop_scan() # And stop scanning.
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while uart_connection and uart_connection.connected: # If connected...
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if cpb.button_a and not button_a_pressed: # If button A pressed...
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print("Button A pressed.")
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# Send a LEFT button packet.
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if not send_packet(uart_connection,
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ButtonPacket(ButtonPacket.LEFT, pressed=True)):
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uart_connection = None
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continue
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button_a_pressed = True # Set to True.
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time.sleep(0.05) # Debounce.
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if not cpb.button_a and button_a_pressed: # On button release...
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button_a_pressed = False # Set to False.
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time.sleep(0.05) # Debounce.
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if cpb.button_b and not button_b_pressed: # If button B pressed...
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print("Button B pressed.")
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# Send a RIGHT button packet.
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if not send_packet(uart_connection,
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ButtonPacket(ButtonPacket.RIGHT, pressed=True)):
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uart_connection = None
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continue
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button_b_pressed = True # Set to True.
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time.sleep(0.05) # Debounce.
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if not cpb.button_b and button_b_pressed: # On button release...
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button_b_pressed = False # Set to False.
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time.sleep(0.05) # Debounce.
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if cpb.switch is not last_switch_state: # If the switch state is changed...
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last_switch_state = cpb.switch # Set state to current switch state.
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print("Switch is to the", "left: LEDs off!" if cpb.switch else "right: LEDs on!")
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# Send a BUTTON_1 button packet.
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if not send_packet(uart_connection,
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ButtonPacket(ButtonPacket.BUTTON_1, pressed=cpb.switch)):
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uart_connection = None
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continue
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if cpb.switch: # If switch is to the left...
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cpb.pixels.fill((0, 0, 0)) # Turn off the LEDs.
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else: # Otherwise...
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r, g, b = map(scale, cpb.acceleration) # Map acceleration values to RGB values...
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color = (r, g, b) # Set color to current mapped RGB value...
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print("Color:", color)
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cpb.pixels.fill(color) # Fill controller LEDs with current color...
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if not send_packet(uart_connection, ColorPacket(color)): # And send a color packet.
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uart_connection = None
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continue
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time.sleep(0.1) # Delay to prevent sending packets too quickly.

‎Circuit_Playground_Bluefruiit_NeoPixel_Controller/Receiver.py

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"""
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Receiver code for Circuit Playground Bluefruit NeoPixel Animation and Color controller. To be used
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with another Circuit Playground Bluefruit running the controller code.
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"""
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import board
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import neopixel
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from adafruit_circuitplayground.bluefruit import cpb
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from adafruit_led_animation.animation import Blink, Comet, Sparkle, AnimationGroup,\
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AnimationSequence
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import adafruit_led_animation.color as color
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from adafruit_ble import BLERadio
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from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
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from adafruit_ble.services.nordic import UARTService
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from adafruit_bluefruit_connect.packet import Packet
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from adafruit_bluefruit_connect.color_packet import ColorPacket
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from adafruit_bluefruit_connect.button_packet import ButtonPacket
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# The number of NeoPixels in the externally attached strip
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# If using two strips connected to the same pin, count only one strip for this number!
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STRIP_PIXEL_NUMBER = 30
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# Setup for blink animation
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BLINK_SPEED = 0.5 # Lower numbers increase the animation speed
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BLINK_INITIAL_COLOR = color.RED # Color before controller is connected
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# Setup for comet animation
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COMET_SPEED = 0.03 # Lower numbers increase the animation speed
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COMET_INITIAL_COLOR = color.MAGENTA # Color before controller is connected
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CPB_COMET_TAIL_LENGTH = 5 # The length of the comet on the Circuit Playground Bluefruit
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STRIP_COMET_TAIL_LENGTH = 15 # The length of the comet on the NeoPixel strip
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CPB_COMET_BOUNCE = False # Set to True to make the comet "bounce" the opposite direction on CPB
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STRIP_COMET_BOUNCE = True # Set to False to stop comet from "bouncing" on NeoPixel strip
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# Setup for sparkle animation
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SPARKLE_SPEED = 0.03 # Lower numbers increase the animation speed
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SPARKLE_INITIAL_COLOR = color.PURPLE # Color before controller is connected
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# Create the NeoPixel strip
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strip_pixels = neopixel.NeoPixel(board.A1, STRIP_PIXEL_NUMBER, auto_write=False)
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# Setup BLE connection
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ble = BLERadio()
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uart = UARTService()
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advertisement = ProvideServicesAdvertisement(uart)
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# Setup animations
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animations = AnimationSequence(
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AnimationGroup(
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Blink(cpb.pixels, BLINK_SPEED, BLINK_INITIAL_COLOR),
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Blink(strip_pixels, BLINK_SPEED, BLINK_INITIAL_COLOR),
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sync=True
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),
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AnimationGroup(
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Comet(cpb.pixels, COMET_SPEED, COMET_INITIAL_COLOR, tail_length=CPB_COMET_TAIL_LENGTH,
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bounce=CPB_COMET_BOUNCE),
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Comet(strip_pixels, COMET_SPEED, COMET_INITIAL_COLOR, tail_length=STRIP_COMET_TAIL_LENGTH,
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bounce=STRIP_COMET_BOUNCE)
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),
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AnimationGroup(
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Sparkle(cpb.pixels, SPARKLE_SPEED, SPARKLE_INITIAL_COLOR),
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Sparkle(strip_pixels, SPARKLE_SPEED, SPARKLE_INITIAL_COLOR)
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),
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)
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animation_color = None
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mode = 0
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blanked = False
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while True:
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ble.start_advertising(advertisement) # Start advertising.
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was_connected = False
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while not was_connected or ble.connected:
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if not blanked: # If LED-off signal is not being sent...
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animations.animate() # Run the animations.
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if ble.connected: # If BLE is connected...
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was_connected = True
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if uart.in_waiting: # Check to see if any data is available from the controller.
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try:
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packet = Packet.from_stream(uart) # Create the packet object.
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except ValueError:
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continue
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if isinstance(packet, ColorPacket): # If the packet is color packet...
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if mode == 0: # And mode is 0...
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animations.color = packet.color # Update the animation to the color.
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print("Color:", packet.color)
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animation_color = packet.color # Keep track of the current color...
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elif mode == 1: # Because if mode is 1...
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animations.color = animation_color # Freeze the animation color.
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print("Color:", animation_color)
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elif isinstance(packet, ButtonPacket): # If the packet is a button packet...
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# Check to see if it's BUTTON_1 (which is being sent by the slide switch)
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if packet.button == ButtonPacket.BUTTON_1:
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if packet.pressed: # If controller switch is to the left...
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print("Controller switch is to the left: LEDs off!")
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else: # If the controller switch is to the right...
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print("Controller switch is to the right: LEDs on!")
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# If the controller switch is moved from right to left...
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if packet.pressed and not blanked:
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animations.fill(color.BLACK) # Turn off the LEDs.
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blanked = packet.pressed # Track the state of the slide switch.
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if packet.pressed: # If the buttons on the controller are pressed...
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if packet.button == ButtonPacket.LEFT: # If button A is pressed...
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print("A pressed: animation mode changed.")
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animations.next() # Change to the next animation.
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elif packet.button == ButtonPacket.RIGHT: # If button B is pressed...
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mode += 1 # Increase the mode by 1.
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if mode == 1: # If mode is 1, print the following:
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print("B pressed: color frozen!")
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if mode > 1: # If mode is > 1...
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mode = 0 # Set mode to 0, and print the following:
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print("B pressed: color changing!")

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