AWS IoT_Connected Home Solutions

© 2018, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Olawale Oladehin
Sr. Solutions Architect, AWS IoT
Mike Maas
Sr. Evangelist, Alexa
SRV201
AWS to IoT: Connected Home Solutions

Solutions Architect, IoT
AWS
@oladehin
Olawale Oladehin
Senior Evangelist
Amazon Alexa
@mike_maas
Mike Maas

What you will learn
• Overview of AWS IoT Services
• Implementing Smart Home Solutions on AWS
• Bringing voice to your applications

Overview of AWS IoT

Sense & act
Things
Secure device
connectivity
and messaging
AWS IoT Core
Fleet onboarding,
management and
SW updates
Fleet
audit and
protection
IoT data analytics
and intelligence
AWS IoT Device
Management
AWS IoT Device
Defender
GatewayEndpoints
AWS Greengrass
AWS IoT 1-Click
AWS IoT
Analytics
Amazon
FreeRTOS
Storage & compute & learn
Cloud
Secure local
triggers, actions,
and data sync
Intelligence
Insights & Logic → Action
AWS IoT Services Suite

To securely connect devices
to the AWS cloud and
other devices at scale
To fully integrate with
other AWS service to reason
on top of the data
(analytics, databases, AI, etc.)
To route, process, and
act upon data from
connected devices
Secure device connectivity and messaging
AWS IoT Core
AWS IoT Core is a managed service that lets connected devices easily
and securely interact with cloud applications and other devices.
To enable applications to
interact with devices even
when they are offline

Secure device connectivity and messaging
AWS IoT Core
Device
gateway
Rules
engine
Message
broker
Device
Shadow
RegistryIdentity
service
AWS IoT Core is a managed service that lets connected devices easily
and securely interact with cloud applications and other devices.

MQTT topics
Ephemeral
Publish / subscribe
• Publish to individual topics
• Subscribe to one or topics and hierarchies
• Published messages and subscribed responses are metered
Wildcards
• Single-level (*)
• myhome/groudfloor/*/temperature
• Returns temperature messages for all groundfloor things
• Multi-level (#)
• myhome/groundfloor/#
• Returns all messages for all groundfloor things

MQTT topics
home/ac/AAA/temperature
home/ac/BBB/temperature
home/ac/CCC/temperature
home/ac/DDD/temperature
Device: AAA
Device: BBB
Device: CCC
Device: DDD
PUB: home/ac/${clientId}/temperature SUB: home/ac/+/temperature

Authentication / authorization
AWS IoT
Device
Credentials
Establish TLS 1.2 Connection, request server certificate
Sign connection with server certificate, request client certificate
Validate server certificate, sign response with client certificate
Connection authenticated, policy attached to
client certificate applied
Username: alice
Password: redQueen!
Establish HTTPS Connection, request server certificate
Sign connection with server certificate, wait for message (REST API)
Validate server certificate, sign response with credentials (Cognito or IAM/STS)
Connection authenticated, IAM policy associated
with access key/secret key used
Credentials
Note: MQTT can use cert or SigV4, HTTP can use cert or SigV4

AWS Greengrass extends AWS IoT onto your devices, so that they can act locally on
the data they generate, while still taking advantage of the cloud.
Extend AWS IoT to the Edge
AWS Greengrass
Edge Cloud
Law of Economics
Law of Physics
Law of the Land

Extend AWS IoT to the Edge
AWS Greengrass
Data and
state sync
Security Over-the
air-updates
Protocol
adapters
Local
device shadows
Local
actions
AWS Lambda
functions
Local
messages and
triggers
Local
message broker
AWS-grade
security
Easily update AWS
Greengrass Core
Machine
learning
inference
Local execution
of ML models
Local
resource
access
Lambdas interact with
peripherals
Easy integrations
with local protocols
ʥ
A

Batch fleet
provisioning
Real-time
Fleet index & search
Fine-grained device
logging
& monitoring
Over-the-
air updates
AWS IoT Device Management
Device Management Service
AWS IoT Device Management helps you onboard, organize, monitor,
and remotely manage your growing number of connected devices.

Connected Home – use cases

Connected Home – use cases
Home
automation
Lighting systems
Media & entertainment
White goods
Small appliances
Home assistants
Home
security & monitoring
Door locks
Smart meters
Security cameras
Water leak detectors
Thermostat
Home
networking
Wi-Fi routers & modems
Cable set-top boxes

Connected Home – challenges
Hard to maintain
interoperability between
multi-vendor devices
Lack of a reliable
& scalable cloud infrastructure platform
Need for local intelligence
Need to ensure secure
connections
Hard to differentiate in a crowded
market
Hard to improve customer experiences
while keeping
costs low

Undifferentiated heavy lifting of IoT
Scalable, managed IoT platform
Device Management and AWS Analytics
Security and identity for AWS IoT devices
Pay-as-you-go pricing
1
2
3
How AWS helps customers solve Smart Home challenges

Fundamentals of Smart Home implementations
The cloud IoT applicationsThe home

Implementing Smart Home Solutions

Home security & monitoring
Use cases
Video and image
capture
Anomaly detection Home
surveillance
Consumer
notifications

Home security & monitoring
AWS Greengrass ML Inference
brings machine learning
capabilities to a camera,
like being able to detect an
intruder as it’s happening.
AWS IoT Device Management,
AWS IoT Device Defender, and
AWS IoT Analytics provide added
benefits once devices are
connected.
AWS Greengrass allows the
security camera, door lock, and
even outdoor lighting to
continue operating even when
cloud connection is lost. It can
also take actions locally,
avoiding a costly and timely
round trip to the cloud.
Amazon FreeRTOS provides security,
connectivity, and updateability for
devices running on microcontrollers,
like a connected door lock or video
door bell.

Smart Home Security – video camera

Temporary security
credential
IAM
Smart Home Security Camera – architecture
AWS IoT IoT Rule
AWS Management
Console
Amazon Cognito
Amazon Kinesis Video
IoT Thing Camera

Securing authorization to Smart Home devices
IAM AssumeRole policy
{
"Effect": "Allow",
"Action": [
”kinesisvideo:GetItem",
”kinesisvideo:Describe*”
],
"Resource": "arn:aws:kinesisvideo:us-east-1:123456789012:stream/${credentials-iot:ThingName}/*"
}
IoT context variables
• credentials-iot:ThingName
• credentials-iot:ThingTypeName
• credentials-iot:AwsCertificateId

Demo

Alexa Skills Kit

Alexa Skills Kit
The Alexa Skills Kit (ASK) lets you teach Alexa new skills.
It contains the documentation, tools, and sample code needed to
build Alexa skills.
https://developer.amazon.com/ask

Types of Alexa Skills
Custom Skills
Smart Home Skills
Flash Briefing Skills
Video Skills
List Skills
For crafting unique game or app experiences
For providing flash briefing content
For providing video playback of content
For using and maintaining lists
For controlling a smart home and devices

Alexa Skills Kit
Directive
Audio
Cards
Speech recognition
Machine learning
Natural language understanding
Text to speech
Event
Skill
Service
Alexa Skills Kit

Smart Home Capability interface examples
Interface Capability
Alexa.Discovery Discover and describe endpoints
Alexa.PowerController Turning on or off
Alexa.PercentageController Sets a percentage
(Percentage, intensity, speed, etc.)
Alexa.ColorController Change and report the color
(Hue, saturation, brightness)
Alexa.PlaybackController Control playback
(Play, pause, rewind, etc.)
Alexa.ThermostatController Set a temperature or point or range

Endpoint cloud architecture

Alexa Cloud
Endpoint Cloud
Smart Home
Skill Service
Directives
Events
Alexa Event Gateway
Login with Amazon
Amazon Web Services (AWS)
Lambda
Home Network
Internet
Account Linking / OAuth
Proactive State Updates
Asynchronous Responses
Smart Home Skill API
Alexa application & devicesEndpoints

Alexa Cloud
API Gateway
Smart Home
Skill Service
Directives
Events
Alexa Event Gateway
Login
with
Amazon
Amazon Web Services (AWS)
Lambda
Home Network
Internet
Account Linking / OAuth
Proactive State Updates
Asynchronous Responses
Smart Home Skill API
Alexa application & devicesEndpoints
AWS IoTDynamoDB
API Service
Lambda

Sample architecture

Alexa Service infrastructure
Alexa
enabled
device
Alexa Smart
Home Skill
AWS
Lambda
Amazon
S3
Amazon
DynamoDB
AWS
CloudFormation
IAM
Amazon API
Gateway
AWS IoT
Sample-Smart-Home-Backend

Alexa Service infrastructure instances
Alexa
enabled
device
Alexa Smart
Home Skill
AWS
CloudFormation
Sample-Smart-Home-Backend
SampleEndpointAdapter
SampleSkillAdapter
SampleEndpointDetails
SampleUsers
endpoint-code-us
EndpointLambdaExecutionRole
Python (boto)
/directives
/endpoints
/events

Sample demonstration

Key points
Amazon API Gateway
Message Router
Inbound: Directive and endpoint abstraction with JSON Messaging Data
Outbound: Helps handle proactive state updates
AWS Lambda
Logical Router
Handles compute / processing for API and Skill services
AWS IoT
State Arbiter
From Alexa (directives)
From the device cloud (device state changes)
Amazon DynamoDB
Data Provider
Referential information that may not change (SKUs, descriptions, etc.)

Summary
• Solving IoT challenges with AWS IoT and Alexa
• Overview of common AWS services for Smart Home
• Examples of home automation and home security implementations

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Thank you!

Resources
Smart Home Portal
https://alexa.design/smarthome
https://aws.amazon.com/iot/solutions/connected-home/
Smart Home Code
https://github.com/alexa/alexa-smarthome
Developer Slack Channel
https://alexasmarthome.slack.com
Invite Link: https://alexa.design/smarthome-invite-slack
Sample Backend
https://github.com/alexa/alexa-smarthome/tree/master/sample_backend
AWS IoT as Credentials Provider
https://amzn.to/2IXl58C
Amazon Kinesis Video
https://aws.amazon.com/kinesis/video-streams/

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