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#!/usr/bin/env python3
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"""Controls the LEDs on the ReSpeaker 2mic HAT, inspired by smart speakers like Alexa and Alice."""
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import argparse
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import asyncio
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import logging
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import time
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from functools import partial
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from math import ceil
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from typing import Tuple, List, Optional
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import gpiozero
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import spidev
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from wyoming.asr import Transcript
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from wyoming.event import Event
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from wyoming.satellite import (
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RunSatellite,
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SatelliteConnected,
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SatelliteDisconnected,
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StreamingStarted,
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StreamingStopped,
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)
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from wyoming.server import AsyncEventHandler, AsyncServer
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from wyoming.vad import VoiceStarted, VoiceStopped
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from wyoming.wake import Detection
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_LOGGER = logging.getLogger()
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NUM_LEDS = 3
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LEDS_GPIO = 12
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RGB_MAP = {
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"rgb": [3, 2, 1],
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"rbg": [3, 1, 2],
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"grb": [2, 3, 1],
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"gbr": [2, 1, 3],
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"brg": [1, 3, 2],
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"bgr": [1, 2, 3],
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}
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async def main() -> None:
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"""Main entry point."""
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parser = argparse.ArgumentParser()
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parser.add_argument("--uri", required=True, help="unix:// or tcp://")
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parser.add_argument("--debug", action="store_true", help="Log DEBUG messages")
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parser.add_argument(
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"--led-brightness",
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type=int,
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choices=range(1, 32),
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default=31,
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help="LED brightness (integer from 1 to 31)",
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)
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args = parser.parse_args()
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logging.basicConfig(level=logging.DEBUG if args.debug else logging.INFO)
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_LOGGER.debug(args)
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_LOGGER.info("Ready")
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# Turn on power to LEDs
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led_power = gpiozero.LED(LEDS_GPIO, active_high=False)
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led_power.on()
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leds = APA102(num_led=NUM_LEDS, global_brightness=args.led_brightness)
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# Start server
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server = AsyncServer.from_uri(args.uri)
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try:
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await server.run(partial(LEDsEventHandler, args, leds))
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except KeyboardInterrupt:
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pass
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finally:
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leds.cleanup()
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led_power.off()
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# -----------------------------------------------------------------------------
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_BLACK = (0, 0, 0)
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_WHITE = (255, 255, 255)
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_RED = (255, 0, 0)
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_YELLOW = (255, 255, 0)
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_BLUE = (0, 0, 255)
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_GREEN = (0, 255, 0)
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_PURPLE = (128, 0, 128)
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_ORANGE = (255, 165, 0)
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_CYAN = (0, 255, 255)
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class LEDsEventHandler(AsyncEventHandler):
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"""Event handler for clients, with animations inspired by Alexa and Alice."""
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def __init__(
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self,
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cli_args: argparse.Namespace,
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leds: "APA102",
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*args,
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**kwargs,
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) -> None:
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super().__init__(*args, **kwargs)
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self.cli_args = cli_args
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self.client_id = str(time.monotonic_ns())
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self.leds = leds
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self.voice_active = False
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self.voice_animation_task: Optional[asyncio.Task] = None
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self.streaming_active = False
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self.streaming_animation_task: Optional[asyncio.Task] = None
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_LOGGER.debug("Client connected: %s", self.client_id)
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async def handle_event(self, event: Event) -> bool:
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_LOGGER.debug(event)
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if StreamingStarted.is_type(event.type):
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self.streaming_active = True
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if self.streaming_animation_task is None or self.streaming_animation_task.done():
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self.streaming_animation_task = asyncio.create_task(self.streaming_animation_loop())
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elif Detection.is_type(event.type):
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# Как Alexa: directional blue spotlight for wake/listening
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await self.rotate_colors([_BLUE, _CYAN, _BLACK], rotations=5, delay=0.2) # Вращение для "просыпания"
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self.color(_BLACK)
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elif VoiceStarted.is_type(event.type):
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self.voice_active = True
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if self.voice_animation_task is None or self.voice_animation_task.done():
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self.voice_animation_task = asyncio.create_task(self.voice_animation_loop())
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elif Transcript.is_type(event.type):
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# Как Alexa/Alice: Зеленый успех или эмоция (мигание зеленым для подтверждения)
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await self.pulse_color(_GREEN, pulses=2, duration=0.8)
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self.color(_BLACK)
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elif VoiceStopped.is_type(event.type):
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self.voice_active = False
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if self.voice_animation_task:
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self.voice_animation_task.cancel()
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self.voice_animation_task = None
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await self.fade_out(_BLUE, steps=10, delay=0.15) # Затухание синего, как конец обработки
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elif StreamingStopped.is_type(event.type):
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self.streaming_active = False
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if self.streaming_animation_task:
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self.streaming_animation_task.cancel()
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self.streaming_animation_task = None
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await self.fade_out(_BLUE, steps=10, delay=0.15)
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elif RunSatellite.is_type(event.type):
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self.color(_BLACK)
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elif SatelliteConnected.is_type(event.type):
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# Разовая анимация при подключении, без loop, чтобы в idle не светилось
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await self.pulse_color(_GREEN, pulses=2, duration=1.5)
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self.color(_BLACK)
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elif SatelliteDisconnected.is_type(event.type):
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await self.pulse_color(_RED, pulses=3, duration=0.5) # Красный пульс для ошибки, как Alexa purple/red
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self.color(_BLACK)
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return True
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async def voice_animation_loop(self) -> None:
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"""Loop анимации для VoiceStarted: как Alexa listening/thinking - alternating blue/cyan."""
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try:
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while self.voice_active:
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await self.gradient([_BLUE, _CYAN, _BLUE], duration=1.5) # Градиент для "thinking"
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await self.rotate_colors([_CYAN, _BLUE, _BLACK], rotations=1, delay=0.3) # Вращение для активности
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await asyncio.sleep(0.2)
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except asyncio.CancelledError:
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self.color(_BLACK)
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async def streaming_animation_loop(self) -> None:
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"""Loop для StreamingStarted: pulsing blue как Alexa processing."""
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try:
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while self.streaming_active:
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await self.pulse_color(_BLUE, pulses=1, duration=0.8)
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await asyncio.sleep(0.2)
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except asyncio.CancelledError:
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self.color(_BLACK)
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def color(self, rgb: Tuple[int, int, int]) -> None:
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for i in range(NUM_LEDS):
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self.leds.set_pixel(i, rgb[0], rgb[1], rgb[2])
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self.leds.show()
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def set_colors(self, colors: List[Tuple[int, int, int]]) -> None:
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for i in range(min(NUM_LEDS, len(colors))):
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self.leds.set_pixel(i, colors[i][0], colors[i][1], colors[i][2])
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self.leds.show()
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async def pulse_color(self, rgb: Tuple[int, int, int], pulses: int = 3, duration: float = 0.5) -> None:
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steps = 10
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for _ in range(pulses):
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for bright in range(steps):
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self.set_pixel_bright(rgb, (bright + 1) / steps * 100)
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await asyncio.sleep(duration / (2 * steps))
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for bright in range(steps, 0, -1):
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self.set_pixel_bright(rgb, (bright - 1) / steps * 100)
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await asyncio.sleep(duration / (2 * steps))
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def set_pixel_bright(self, rgb: Tuple[int, int, int], bright_percent: float) -> None:
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for i in range(NUM_LEDS):
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self.leds.set_pixel(i, rgb[0], rgb[1], rgb[2], bright_percent)
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self.leds.show()
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async def rainbow_cycle(self, steps: int = 20, delay: float = 0.05) -> None:
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for step in range(steps):
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colors = []
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for i in range(NUM_LEDS):
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r = int((step + i * 85) % 255)
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g = int((step + i * 85 + 85) % 255)
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b = int((step + i * 85 + 170) % 255)
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colors.append((r, g, b))
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self.set_colors(colors)
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await asyncio.sleep(delay)
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self.color(_BLACK)
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async def gradient(self, colors: List[Tuple[int, int, int]], duration: float = 1.0) -> None:
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steps = 10
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for step in range(steps):
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blended_colors = []
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for i in range(NUM_LEDS):
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idx = i % len(colors)
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next_idx = (idx + 1) % len(colors)
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r = int(colors[idx][0] + (colors[next_idx][0] - colors[idx][0]) * step / steps)
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g = int(colors[idx][1] + (colors[next_idx][1] - colors[idx][1]) * step / steps)
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b = int(colors[idx][2] + (colors[next_idx][2] - colors[idx][2]) * step / steps)
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blended_colors.append((r, g, b))
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self.set_colors(blended_colors)
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await asyncio.sleep(duration / steps)
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async def fade_out(self, start_rgb: Tuple[int, int, int], steps: int = 10, delay: float = 0.1) -> None:
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for step in range(steps, 0, -1):
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r = int(start_rgb[0] * step / steps)
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g = int(start_rgb[1] * step / steps)
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b = int(start_rgb[2] * step / steps)
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self.color((r, g, b))
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await asyncio.sleep(delay)
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self.color(_BLACK)
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async def rotate_colors(self, colors: List[Tuple[int, int, int]], rotations: int = 3, delay: float = 0.2) -> None:
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current_colors = colors[:NUM_LEDS]
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for _ in range(rotations):
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self.set_colors(current_colors)
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await asyncio.sleep(delay)
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current_colors = current_colors[-1:] + current_colors[:-1]
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# -----------------------------------------------------------------------------
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class APA102:
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"""
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Driver for APA102 LEDS (aka "DotStar").
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(c) Martin Erzberger 2016-2017
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"""
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# Constants
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MAX_BRIGHTNESS = 0b11111 # Safeguard: Set to a value appropriate for your setup
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LED_START = 0b11100000 # Three "1" bits, followed by 5 brightness bits
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def __init__(
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self,
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num_led,
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global_brightness,
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order="rgb",
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bus=0,
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device=1,
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max_speed_hz=8000000,
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):
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self.num_led = num_led # The number of LEDs in the Strip
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order = order.lower()
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self.rgb = RGB_MAP.get(order, RGB_MAP["rgb"])
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# Limit the brightness to the maximum if it's set higher
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if global_brightness > self.MAX_BRIGHTNESS:
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self.global_brightness = self.MAX_BRIGHTNESS
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else:
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self.global_brightness = global_brightness
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_LOGGER.debug("LED brightness: %d", self.global_brightness)
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self.leds = [self.LED_START, 0, 0, 0] * self.num_led # Pixel buffer
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self.spi = spidev.SpiDev() # Init the SPI device
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self.spi.open(bus, device) # Open SPI port 0, slave device (CS) 1
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# Up the speed a bit, so that the LEDs are painted faster
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if max_speed_hz:
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self.spi.max_speed_hz = max_speed_hz
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def clock_start_frame(self):
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self.spi.xfer2([0] * 4) # Start frame, 32 zero bits
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def clock_end_frame(self):
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self.spi.xfer2([0xFF] * 4)
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def set_pixel(self, led_num, red, green, blue, bright_percent=100):
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if led_num < 0:
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return # Pixel is invisible, so ignore
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if led_num >= self.num_led:
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return # again, invisible
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brightness = int(ceil(bright_percent * self.global_brightness / 100.0))
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ledstart = (brightness & 0b00011111) | self.LED_START
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start_index = 4 * led_num
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self.leds[start_index] = ledstart
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self.leds[start_index + self.rgb[0]] = red
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self.leds[start_index + self.rgb[1]] = green
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self.leds[start_index + self.rgb[2]] = blue
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def set_pixel_rgb(self, led_num, rgb_color, bright_percent=100):
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self.set_pixel(
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led_num,
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(rgb_color & 0xFF0000) >> 16,
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(rgb_color & 0x00FF00) >> 8,
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rgb_color & 0x0000FF,
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bright_percent,
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)
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def rotate(self, positions=1):
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cutoff = 4 * (positions % self.num_led)
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self.leds = self.leds[cutoff:] + self.leds[:cutoff]
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def show(self):
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self.clock_start_frame()
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data = list(self.leds)
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while data:
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self.spi.xfer2(data[:32])
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data = data[32:]
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self.clock_end_frame()
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def cleanup(self):
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self.spi.close() # Close SPI port
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# -----------------------------------------------------------------------------
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if __name__ == "__main__":
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try:
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asyncio.run(main())
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except KeyboardInterrupt:
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pass
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