Making a Smart Kitty Detector

(powered by the cloud Amazon Web Services)

• @lynnaloo on the internet
  

• Makes art, robots, and software

• Software Engineer @ ETA

• Really likes cats and turtles

Me.

• Norfolk.js

• NodeBots Day Norfolk

• RevolutionConf

Me.

I organize stuff:

What is Amazon Web Services?

Amazon Web Services (AWS) is a secure cloud services platform, offering compute power, database storage, content delivery and other functionality to help businesses scale and grow. 

- Amazon

About AWS

• It's inexpensive

• It's reliable(ish)

• It's secure.

• It's fast.

• It's huge [it's Amazon].

AWS Products and Services

• Cloud Computing

• File Storage

• NoSQL & Relational Databases

• AI & Machine Learning

• Internet of Things

For the Kitty Detector

• AWS IoT

• S3

• AWS Lambda

• Amazon Rekognition

Amazon IoT

• Pub/sub system for hardware*
  

• Devices are added as "things"

• Device messages are filtered by the Rules Engine (SQL).
  

• The Rules Engine routes messages to actions.

Amazon IoT

Device to IoT ????

• IoT supports publish and subscribe via MQTT protocol and publish via HTTPS.
  

• For browser-only applications, MQTT messages can be sent and received via web-sockets.
  

• IoT has SDKs for Android/iOS, Java, Python, JavaScript (Browser and Node.js), and embedded C. 

Can I connect *any* hardware?

• Nope.
  

  • It has to be able to support TLS 1.2 for MQTT or SSL certificates for the REST API.

• Sorta.

  • You can tether the hardware to a computer or Raspberry Pi. Or the device can just be a computer running the SDK.

  • There are some proxy hacks for outlying hardware.    

Amazon AI Services

• Amazon Lex - Chatbots

• Amazon Polly - Text to Speech

• Amazon Rekognition - Images 

For developers who want access to AI technologies without having to train or develop their own ML models.

Amazon Rekognition

[ 
    { Name: 'Animal', Confidence: 98.29473114013672 },
    { Name: 'Cat', Confidence: 97.9908218383789 },
    { Name: 'Adorable', Confidence: 97.9908218383789 },
    { Name: 'Plant', Confidence: 78.9802474975586 },
    { Name: 'Potted Plant', Confidence: 64.9802474975586 },
    { Name: 'Mammal', Confidence: 64.9908218383789 },
    { Name: 'Manx', Confidence: 64.9908218383789 },
    { Name: 'Pet', Confidence: 64.9908218383789 } 
]

AWS Lambda

• Part of the "serverless" architecture

• Users run code without provisioning or managing servers 

• You're only charged when your code is executed

• Supports several languages

• Functions are executed by events

AWS Lambda

AWS Lambda

'use strict';

const fetch = require('node-fetch');
const AWS = require('aws-sdk');

const s3 = new AWS.S3();

module.exports.save = (event, context, callback) => {
  fetch(event.image_url)
    .then(response => response.buffer())
    .then(buffer => (
      s3.putObject({
        Bucket: process.env.BUCKET,
        Key: event.key,
        Body: buffer,
      }).promise()
    ))
    .then(() => {
      callback(null, 'Saved');
    })
    .catch((error) => {
      callback(error, null);
    });
};

Back to the Project:

A motion detector that texts a user when a cat (and only a cat) is detected.

Kitty Detector Parts List

• Raspberry Pi 3

• PIR Sensor

• External Power Source

• Lead Wires

• Detector case (optional)

• 1 moving kitty (optional)

The Code

• Raspberry Pi Hardware/Amazon IoT Code:
  https://github.com/lynnaloo/kitty-detector

• Serverless Framework/Lambdas:
  https://github.com/lynnaloo/go-away-kitty

Demo Time!