1.
Alexa Smart Home Skill
JAWS-UG IoT専門支部
IoTサロン 2016-11
合同開催スペシャル

2.
@sparkgene
市川 純 (Jun Ichikawa)
favorite services：
Route 53、Lambda、AWS IoT
Recruit Marketing Partners
infrastructure engineer

3.
Alexa Skill types
• Custom Interaction Model(Custom
Skill)
• Smart Home Skill
• Flash Briefing Skill

4.
Custom Skill
• Build a skill with a custom interaction
model
• Customers say invocation name to use
it. “Alexa, ask Uber to request a
ride”
• Most flexible, but most complex to
customers.

5.
Smart Home Skill
• Easy to use for customer.
• Customers say “Alexa, turn on living
room lights”
• This skill is for cloud connected smart
home devices.

6.
Flash Briefing Skill
• It can be integrated into "Alexa Flash
Briefing”
• Customers can simply ask “Alexa,
what’s my Flash Briefing” to hear your
content
• Currently Flash Briefing is only available
for the English (U.S.) language

7.
DIFFERENCE
BETWEEN
CUSTOM SKILL

8.
Custom Skill
• design your own interaction model
• interaction name is required
• customer need to remember
interaction name or invocation phrase
• you can use any server to host skill

9.
Smart Home Skill
• built-in interaction model
• natural utterances to control device
• Alexa need a grant permissions
(OAuth) to retrieve device information
and control device
• Skill must use AWS Lambda function

10.
Mange devices on cloud
Customer need to register their devices to the device
makers cloud.

11.
On personal use, you don’t need to
register devices. Just hard code in your
lambda function.

12.
HOW TO MAKE IT

13.
Demo Video
https://youtu.be/nT20o2uv2h0

14.
demo’s architecture
this slide
explain
only here
see here to create custom skill version architecture
https://www.hackster.io/sparkgene/alexa-makes-home-smarter-7e1981

15.
Prerequisites to Smart Home
Skill Development
• Amazon developer account
– https://developer.amazon.com/
• AWS account
• Knowledge of Java, Node.js, or Python
as Lambda functions can be written
in any of these language
• A basic understanding of OAuth 2.0

16.
Three steps to create Skill
• Create “Login With Amazon”(LWA)
security profile
• register Smart Home Skills
• Create Lambda function
step-by-step article
・https://developer.amazon.com/public/solutions/alexa/alexa-skills-
kit/docs/steps-to-create-a-smart-home-skill
・http://qiita.com/sparkgene/items/055d7864c92a80b0c040

17.
Create Login With Amazon
https://developer.amazon.com/home.html

18.
• enter “Allowed Return URLs” in the Web Settings after
register skill Account Linking.

19.
register Smart Home Skills
https://developer.amazon.com/edw/home.html#/skill/create/
• Update “End point” after creating lambda function

20.
Account Linking
https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/steps-to-
create-a-smart-home-skill#finish-registering-your-skill-in-the-developer-portal
• To finish registering your skill, you
must configure OAuth 2.0 for your
skill, which is used for account linking.
You can use Login with Amazon or
another provider for this section.
• Use “Redirect URL” to allow redirect at
OAuth provider

21.
Authoization URL:
https://www.amazon.com/ap/oa?redirect_uri=https://pitangui.amazon.com/api/skill/link/<ID>

22.
Create Lambda function
• Alexa skill is only available on us-east-
1 and eu-west-1 region
• Node.js blue print is available
– alexa-smart-home-skill-adapter

23.
Smart Home Skill API
• Smart Home Skill API communicate
with your skill(skill adapter) with
same basic structure.
• Skill adapter directives contain two
top-level objects
– header
– payload

24.
"header": {
"messageId": "6d6d6e14-8aee-473e-8c24-0d31ff9c17a2",
"name": "DiscoverAppliancesRequest",
"namespace": "Alexa.ConnectedHome.Discovery",
"payloadVersion": "2”
},
"payload": {
"accessToken": "OAuth Token here"
}
header and payload
accessToken always include in request.
use the access token to know who’s request.

25.
DiscoverAppliancesRequest
The request come on
• When you say “Alexa, discover
devices”
• hourly after your device register on
Alexa (device health check)

26.
{
"header": {
"messageId": "6d6d6e14-8aee-473e-8c24-0d31ff9c17a2",
"name": "DiscoverAppliancesRequest",
"namespace": "Alexa.ConnectedHome.Discovery",
"payloadVersion": "2"
},
"payload": {
"accessToken": "OAuth Token here"
}
}

27.
DiscoverAppliancesResponse
{
"header": {
"messageId": "ff746d98-ab02-4c9e-9d0d-b44711658414",
"name": "DiscoverAppliancesResponse",
"namespace": "Alexa.ConnectedHome.Discovery",
"payloadVersion": "2"
},
"payload": {
"discoveredAppliances": []
}
}

28.
discoveredAppliances
"discoveredAppliances": [
{
"actions": [
”turnOn",
”turnOff”
],
"additionalApplianceDetails": {
"extraDetail1": "optionalDetailForSkillAdapterToReferenceThisDevice”
},
"applianceId": "unique Device Id",
"friendlyDescription": "description that is shown to customer",
"friendlyName": " Bedroom Light",
"isReachable": true,
"manufacturerName": "your Manufacturer Name",
"modelName": "fancyThermostat",
"version": "your software version number here."
}
]
The action which device support

29.
actions
• turnOff
– “Alexa, turn off the <device name>”
• turnOn
– “Alexa, turn on the <device name>”
• setTargetTemperature
– “Alexa, set the <room name> to <number> degrees”
• incrementTargetTemperature
– “Alexa, increase the <device name> by <number> degrees”
• decrementTargetTemperature
– “Alexa, decrease <device name> by <number> degrees”
• setPercentage
– “Alexa, set <name> to <number> percent”
• incrementPercentage
– “Alexa, increase <device name> by <number> percent”
• decrementPercentage
– “Alexa, decrease <device name> by <number> percent”

30.
TurnOnRequest
{
"header": {
"messageId": "01ebf625-0b89-4c4d-b3aa-32340e894688",
"name": "TurnOnRequest",
"namespace": "Alexa.ConnectedHome.Control",
"payloadVersion": "2"
},
"payload": {
"accessToken": "[OAuth Token here]",
"appliance": {
"additionalApplianceDetails": {},
"applianceId": "[Device ID for Ceiling Fan]"
}
}
}

31.
TurnOnConfirmation
{
"header": {
"messageId": "26fa11a8-accb-4f66-a272-8b1ff7abd722",
"name": "TurnOnConfirmation",
"namespace": "Alexa.ConnectedHome.Control",
"payloadVersion": "2"
},
"payload": {}
}

32.
Error Response
• TargetOfflineError
– target device is not connected to the customer’s device cloud or is not on.
• BridgeOfflineError
– target device is connected to a home automation hub or bridge, which is
powered off.
• NoSuchTargetError
– target device cannot be found, meaning it was never configured by the end-
user.
• ExpiredAccessTokenError
– the access token used for authentication has expired and is no longer valid.
• ValueOutOfRangeError
– customer request would set a target value to a value out of its supported
range.
• and more..
skill adapter should respond with the appropriate error type, and
supporting information

33.
ValueOutOfRangeError
{
"header":{
"namespace":"Alexa.ConnectedHome.Control",
"name":" ValueOutOfRangeError",
"payloadVersion":"2",
"messageId":"697fe957-c842-4545-a159-8a8c75fbe5bd"
},
"payload":{
"minimumValue":15.0,
"maximumValue":30.0
}
}

34.
DISCOVERY DEMO
- enable skill
- Login with Amazon
- discover device
- Turn on request

35.
Questions?

36.
appendix
• slide demo skill
– https://github.com/sparkgene/smart_ho
me_skill/blob/master/aws_iot_device.py
• Raspbery Pi setup guide for the demo
– https://www.hackster.io/sparkgene/alexa
-makes-home-smarter-7e1981