Building better IoT Applications without Servers

Ian Massingham Technology Evangelist, AWS

IanMmmm

Development, It’s fun

What’s hard (and probably not fun)

about running applications?

Deployment

Operations

Scaling

Security

Cost Optimisation

Lifecycle Management

Why Serverless?

It helps to solve a lot of these issues

One implementation: AWS Lambda

(plus a few other bits & pieces)

How do you apply these techniques to IoT?

Before we get to that

Other problems you need to solve

Device connectivity. It might be intermittent

Authentication & Authorisation

Device Registration

Security & cryptographic materials handling

Deploying/scaling/updating your Business/App Logic

Persisting Device Data (with the right characteristics)

(Predictive) Analytics/Visualisation

Building on platforms helps

AWS IoT

So don’t build a platform, unless you’re building a platform. In

which case, fine, build a platform.

Building ‘Hello World’ (for IoT Developers)

Turns out, developers are creative

Sassy Ping PongScore Keeper

Source: https://www.hackster.io/youngd/ping-pong-showdown-eabaed

Slack-powered Doorbell

Source: www.theatlantic.com/notes/2016/07/make-every-week-2-a-silent-slack-powered-doorbell/490880/

Source: http://www.andrewmcgill.me/2016/08/19/make-every-week-sweetgreen-salad-button.html

EmergencySweet Green Ordering

Push a button to get directions to the right meal within your budget. (Integrate time of day, weather, Google Directions, Yelp, and Stripe)

Source: https://medium.com/@_adeel/nerding-out-with-the-amazon-iot-button-84a6e14b6b28#.ekd5hsnez

How does it work?Invoke a Lambda function

Put object in an S3 bucket

Insert, Update, Read from a DynamoDB table

Publish to an SNS Topic or Endpoint

Publish to a Kinesis stream

Kinesis Firehose > Redshift

Republish to AWS IoT

AWS IoT

All with no servers, of course

But wait, I live in the UK and I want to do this. Right now!

HARDWARE YOU WILL (& MIGHT) NEED

• A Raspberry Pi

• Electronics Kit • Try the SunFounder 37 modules Sensor Kit v2.0 for

Raspberry Pi 3, 2, Model B+ with 40-Pin GPIO Extension Board & Jump Wires

• http://www.amazon.co.uk/dp/B014PF05ZA • Example tutorial

• Raspberry Pi Sense Hat (optional fun) • https://www.raspberrypi.org/products/sense-hat/

SETTING UP FOR GPIO/SENSE HAT

Your own electronics/sensor build C (for embedded C)

http://wiringpi.com Python Wrapper Module for WiringPI

https://github.com/WiringPi/WiringPi-Python

For the Sense Hat Python Module

https://github.com/RPi-Distro/python-sense-hat

SETTING UP FOR AWS IOT

Use the AWS Console to create your device

Download the required crypto materials & save the C header file contents with your endpoint, cert, and key details

Download & set up your chosen AWS IoT SDK Get them at : https://aws.amazon.com/iot/sdk/

Building the C SDK on the Raspberry Pi requires the CppUTest library from: https://github.com/cpputest/cpputest/releases/tag/v3.6

Get started with the sample applications that come with the AWS SDKs

EXAMPLES & DEMOS

Emulating the AWS IoT Button (C++) https://github.com/ianmas-aws/iot-button-emulator

Controlling the Sense Hat via AWS IoT Device Shadow (Python) https://github.com/ianmas-aws/PiPyIoT

Go Build, Have Fun

Ian Massingham Technology Evangelist, AWS

IanMmmm

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Alert Someone: AWS IoT to AWS Lambda to SNS

Lambda Function

AWS IoT Rules Engine

PolicyPrivate Key & Certificate

Button

RuleSDK

AWS IoT

AWS Services

Execution Role Policy

SNS Topic

PermissionAction

SNS Topic Subscription

Rule: “Select * from ‘iotbutton/+’

Event Source

Function

SMS or Email

Count items or Track Usage: AWS IoT to DynamoDB to Dashboard

DynamoDB

Rules Engine

Dashboard

S3 Website

Lambda Function

PolicyPrivate Key & Certificate

Button

RuleSDK

AWS IoT

AWS Services

Execution Role

PolicyPermissionAction

Rule: “Select * from ‘iotbutton/+’

Event Source

FunctionDynamoDB API Gateway

Start or Stop Something : AWS IoT to AWS Lambda to an External Endpoint

Lambda Function

Rules Engine

PolicyPrivate Key & Certificate

Thing/Device

RuleSDK

AWS IoT AWS Services

Execution Role Policy

External Endpoint

Permission

Rule: Select * from ‘iotbutton/+’

Action

External API

LifX API