I've only had my Echo a couple of days and there are several occasions when I've been unable to listen to UCB2. I have managed to listen to it a couple of times so it's an intermittent problem.
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GameEngine Echo Buttons - How to define sequence/pattern
Could Alexa or the Echo provide the user with verbal feedback as well as the blue light feedback when respond to queries?
The skill did not begin with a roll call prompting users to awaken their Echo Buttons.
How to delay the animation in Echo buttons?