41 lines
1.2 KiB
Python
41 lines
1.2 KiB
Python
"""
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Used with ble_demo_central.py. Receives Bluefruit LE ColorPackets from a central,
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and updates a Circuit Playground to show the history of the received packets.
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"""
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import board
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import neopixel
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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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# Only the packet classes that are imported will be known to Packet.
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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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NUM_PIXELS = 10
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np = neopixel.NeoPixel(board.NEOPIXEL, NUM_PIXELS, brightness=0.1)
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next_pixel = 0
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def mod(i):
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"""Wrap i to modulus NUM_PIXELS."""
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return i % NUM_PIXELS
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ble = BLERadio()
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uart = UARTService()
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advertisement = ProvideServicesAdvertisement(uart)
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while True:
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ble.start_advertising(advertisement)
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while not ble.connected:
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pass
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while ble.connected:
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packet = Packet.from_stream(uart)
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if isinstance(packet, ColorPacket):
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print(packet.color)
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np[next_pixel] = packet.color
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np[mod(next_pixel + 1)] = (0, 0, 0)
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next_pixel = (next_pixel + 1) % NUM_PIXELS
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