Learn to capture and push live data into Amazon DynamoDB using AWS IoT and AWS Lambda.

1. © 2016, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
John Rotach
Software Development Engineer – AWS IoT
September 28, 2016
Connecting to AWS IoT
Workshop

2. Agenda
• Overview of AWS IoT
• AWS IoT Button w/ AWS Lambda
• Example with a Device SDK

3. AWS IoT

4. AWS IoT

5. AWS IoT
TLS 1.2
Certificate, private key, root CA
WebSockets
Signature V4 Authentication

6. AWS IoT
Standard Protocol Support
MQTT, HTTP, WebSockets
Long Lived Connections
Receive signals from the cloud
Pub Sub
Messaging topics

7. AWS IoT
Persistent, Virtual Thing
Simplifies programming
State
Differences in desired, reported

8. 1. Device Publishes Current State
2. Persist JSON Data Store
3. App requests device’s current state
4. App requests change the state
5. Device Shadow sync’s
updated state
6. Device Publishes Current State 7. Device Shadow confirms state change
AWS IoT Device Shadow Flow

9. AWS IoT Device Shadow - Simple Yet Powerful
{
"state" : {
“desired" : {
"lights": { "color": "RED" },
"engine" : "ON"
},
"reported" : {
"lights" : { "color": "GREEN" },
"engine" : "ON"
},
"delta" : {
"lights" : { "color": "RED" }
} },
"version" : 10
}
Device
Report its current state to one or multiple shadows
Retrieve its desired state from shadow
Mobile App
Set the desired state of a device
Get the last reported state of the device
Delete the shadow
Shadow
Shadow reports delta, desired and reported
states along with metadata and version

10. AWS IoT

11. AWS IoT - SQL Reference
• Like scanning a database table
• Default source is an MQTT topic
EXAMPLES:
• FROM mqtt(‘my/topic’)
• FROM mqtt(‘my/wildcard/+/topic’)
• FROM (‘my/topic’)
SELECT DATA FROM TOPIC WHERE FILTER

12. AWS IoT

13. AWS IoT Button
Overview
• Get connected
• Lambda
• Show resources created by wizard
• Examples from the Internet
• Modify Lambda to hit my API

14. AWS IoT Button
http://aws.amazon.com/iot/button

15. Lambda Wizard
Enter DSN, Click Generate certificate and keys
Download Certificate & Private Key

16. Configure Button
Follow Steps:
WiFi
Certificate
Private Key
Endpoint Subdomain
Region

17. Button AP Mode
Press and hold until LED is blue
Button ConfigureMe - XXX

18. Configure Button
WiFi
Certificate
Private Key
Endpoint Subdomain
Region

19. MQTT Client
Subscribe to: iotbutton/#

20. Lambda Invoked

21. What did we build with the wizard?
Lambda function
IoT
- thing
- certificate, private key
- policy
- rule
IAM
- Lambda execution role

22. Now What?
We have a Lambda – We have the entire Internet

23. My App
Update our Lambda function to hit my HTTP API
Serverless (API Gateway + Lambda)
Code is in the zip file

24. Device SDK
Overview
Connect with NodeJS SDK
Shadow
Control GPIO

25. Device SDK
https://nodejs.org/en/download/

26. Device SDK
Create Thing

27. Device SDK
Create Thing

28. Device SDK
Create Certificate
(one-click)

29. Device SDK
Make a workspace directory
Make a certs directory

30. Device SDK
Create Policy

31. Device SDK
Create Policy

32. Device SDK
Attach Policy to Certificate

33. Device SDK
Attach Policy to Certificate

34. Device SDK
Attach Thing to Certificate

35. Device SDK
Attach Thing to Certificate

36. Device SDK
Download SDK
Git clone SDK
CD into SDK
NPM install

37. Device SDK
Download SDK

38. Device SDK
Copy example to examples

39. Device SDK
Edit sample to point to your certificates

40. Device SDK
Walkthrough of example
- Mock GPIOs
- Shadow update
- Delta handling

41. Device SDK
Run

42. Device SDK
Update shadow
* don’t forget comma

43. Thank You!
@rotach
rotach@amazon.com