Alexa Speech node

In order to send a voice message to an Alexa device it's possible to use the a Message node or a Alexa Speech node to be able to use all Alexa's features.

Alexa and its NLP it's able to perform text recognition, then only messages than will pass through the output pin on the Alexa Receiver node are events and intents. Generally after a Alexa Receiver node there is a Rules node in order to detect which intent name was detected, like in this example

The Alexa Speech node can reproduce normal text or special tags of the Speech Synthesis Markup Language.

When sending a request speech to the user, the microphone stay open for 8 seconds, if the user doesn't respond, the reprompt speech is played, if the user doesn't respond in the next 8 seconds, the session is closed. The reprompt speech is optional and need to be chained with the normal speech:

In order to create a speech programmatically in a upstream Function node:

msg.payload = {
  speechType: 'plainText',
  text: 'Anything to say',
  playBehavior: 'enqueue',
  reprompt: false
};

Available parameters for the msg.payload

Name	Type	Description
speechType	string	Type of speech. One of plainText or ssml
text	string	Text of plainText speech type
ssml	string	Markup of ssml speech type
playBehavior	string	Type of playing: enqueue (add the speech to the queue), replaceAll (replace all messages in queue and plays immediately), replaceEnqueued (replace all messages in queue)
reprompt	boolean	Mark this speech as reprompt