我正在尝试将我的 Lego Mindstorms EV3 与 Amazon Alexa 一起使用，因为它们已经开始了一些竞争。
如 hackster.io ( https://www.hackster.io/alexagadgets/lego-mindstorms-voice-challenge-mission-1-f31925 ) 上所述，我按照所有步骤操作，刷了我的 SD 卡，导入程序并连接我的 EV3与 Alexa。一切正常，除了 Alexa 对唤醒词没有反应。
我没有得到任何错误或其他东西，我不知道问题出在哪里，特别是代码是一个教程，只是复制和粘贴。
这是 hackster.io 提供的代码：
#!/usr/bin/env python3
# Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# You may not use this file except in compliance with the terms and conditions
# set forth in the accompanying LICENSE.TXT file.
#
# THESE MATERIALS ARE PROVIDED ON AN "AS IS" BASIS. AMAZON SPECIFICALLY DISCLAIMS, WITH
# RESPECT TO THESE MATERIALS, ALL WARRANTIES, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
# THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
import os
import sys
import time
import logging
from ev3dev2.sound import Sound
from ev3dev2.led import Leds
from agt import AlexaGadget
# set logger to display on both EV3 Brick and console
logging.basicConfig(level=logging.INFO, stream=sys.stdout, format='%(message)s')
logging.getLogger().addHandler(logging.StreamHandler(sys.stderr))
logger = logging.getLogger(__name__)
class MindstormsGadget(AlexaGadget):
"""
An Mindstorms gadget that will react to the Alexa wake word.
"""
def __init__(self):
"""
Performs Alexa Gadget initialization routines and ev3dev resource allocation.
"""
super().__init__()
self.leds = Leds()
self.sound = Sound()
def on_connected(self, device_addr):
"""
Gadget connected to the paired Echo device.
:param device_addr: the address of the device we connected to
"""
self.leds.set_color("LEFT", "GREEN")
self.leds.set_color("RIGHT", "GREEN")
logger.info("{} connected to Echo device".format(self.friendly_name))
def on_disconnected(self, device_addr):
"""
Gadget disconnected from the paired Echo device.
:param device_addr: the address of the device we disconnected from
"""
self.leds.set_color("LEFT", "BLACK")
self.leds.set_color("RIGHT", "BLACK")
logger.info("{} disconnected from Echo device".format(self.friendly_name))
def on_alexa_gadget_statelistener_stateupdate(self, directive):
"""
Listens for the wakeword state change and react by turning on the LED.
:param directive: contains a payload with the updated state information from Alexa
"""
color_list = ['BLACK', 'AMBER', 'YELLOW', 'GREEN']
for state in directive.payload.states:
if state.name == 'wakeword':
if state.value == 'active':
print("Wake word active", file=sys.stderr)
self.sound.play_song((('A3', 'e'), ('C5', 'e')))
for i in range(0, 4, 1):
self.leds.set_color("LEFT", color_list[i], (i * 0.25))
self.leds.set_color("RIGHT", color_list[i], (i * 0.25))
time.sleep(0.25)
elif state.value == 'cleared':
print("Wake word cleared", file=sys.stderr)
self.sound.play_song((('C5', 'e'), ('A3', 'e')))
for i in range(3, -1, -1):
self.leds.set_color("LEFT", color_list[i], (i * 0.25))
self.leds.set_color("RIGHT", color_list[i], (i * 0.25))
time.sleep(0.25)
if __name__ == '__main__':
gadget = MindstormsGadget()
# Set LCD font and turn off blinking LEDs
os.system('setfont Lat7-Terminus12x6')
gadget.leds.set_color("LEFT", "BLACK")
gadget.leds.set_color("RIGHT", "BLACK")
# Startup sequence
gadget.sound.play_song((('C4', 'e'), ('D4', 'e'), ('E5', 'q')))
gadget.leds.set_color("LEFT", "GREEN")
gadget.leds.set_color("RIGHT", "GREEN")
# Gadget main entry point
gadget.main()
# Shutdown sequence
gadget.sound.play_song((('E5', 'e'), ('C4', 'e')))
gadget.leds.set_color("LEFT", "BLACK")
gadget.leds.set_color("RIGHT", "BLACK")