Azure IoT Workshop

Azure IoT Workshop– 13.10.2017
Azure IoT Workshop
@marco_parenzan

@marco_parenzan
◇.NET, JavaScript,Azure ad IoT Developer, Trainer
and Consultant
◇Microsoft MVP 2017 for Azure
◇Book Author @ Packt, LSWR
◇Community Lead per 1nn0va

Things
IoT Solutions Have a Common Pattern
Insights Actions
Cloud
Gateway
Azure IoT Hub

IoT Scenario
IoT Hub
(Events and Devices)
Function
(Process)
Function
(Alerts)
Storage
(Storage)

Disclaimer
◇This is not an electronic course!
◇You are not an electronic geek!
◇I’m not an electronic geek!
◇You cannot avoid these skills in your team

Warning! We cannot avoid…
Electronic
engineers
Process
engineers
Industrialization
process

Warning! We are not saying…
Software engineers
can create devices

We are just saying…
Embedded
world is no
more a niche
Software
engineers can
contribute

It is no more a niche
Proprietary
Hardware and
tools
Obsolete tools
No software
rules and
quality

Software engineers can contribute
Methodologies Patterns
(Cloud)
Infrastructure
“Openness” Tools Languages

Tools
Up to date
compilers
Modern IDEs
SDK (Libraries
and Drivers)
Debuggers Simulators

Languages
C
Processin
g
Node.js
Python Java C#

Software Developer Role
Develop and test
the process and
the cloud
infrastructure
Develop and test
the device
software design
Cannot test
sensors and
actuators
Work with
fake/random data

Contesto
◇Azienda di Produzione Industriale
￭10-50M EURO
◇Presenza world-wide
◇Mercato Pro
￭Più sensibili al servizi
￭E poi discutiamo del privato
◇Su commessa
￭Assorbe I costi iniziali
￭E poi discutiamo della serie
10M€

Industial Stainless Steel Kitchen Applications

Scenario: resistor performance loss
◇Reference temperature is no more reachable
◇Example
￭fry-top: 400°C 300°C
￭human cannot verify the temperature
￭Mechanical thermostat shows only reference temperature, not current temperature
◇Effects
￭Longer cooking
￭“Bad” cooking
￭Customer impact
￭Prelude to break

Scenario: resistor break
◇Typically after a loose of performances, resistor elements
break (days/weeks)
◇Effects
￭Appliance break
￭Kitchen mainly slow down (few cooking appliances)
￮Kitched typically don’t stop | Many elements in cooking blocks can supply loss
of other elements
￭Long time in assistance (no SLA discussed)
￭Stop can vary from hours to days
￭Final customer impact/reputation

Required solution
◇Telemetry in industrial cooking plants
◇Intelligent appliances that sends status/operational data
◇Collect data world wide
◇Group by
￭Appliances
￭Temperature range
￭Daily/Seasonal data
￭Kitchen/Plant
◇Apply data analysis algorithms
￭Final analysis (analyze costs)
￭Forecast analysis (prevent uncontrolled failures, manage “planned” failures)

Proposizione
◇Assolvere ad una esigenza «immediata»
￭Manutenzione predittiva
￭Manutenzione preventiva
￭Abbattere i costi della manutenzione
◇Assolvere ad una esigenza «a lungo termine»
￭Offrire nuovi servizi alle aziende
￭Permettettere alle aziende di offrire nuovi servizi
￭Nuovo modello di business (CAPEXOPEX)

Industria 4.0
http://www.slideshare.net/alexcurti/piano-industria-40-68702177

Benefici attesi dall’ Industria 4.0

Tecnologie abilitanti Industria 4.0

Embedded
◇È la tecnologia che rende intelligente un elemento prodotto
◇Permette di creare azione ed interazione LOCALE
◇Usa microprocessori o microcontrollori
◇Microcrontrollori: I/O oriented, Atmel ATmeg328, ESP8266
￭I/O, realtime
￭GPIO (5V, 3,3V)
◇Microprocessori: ARM Cortex, Intel Quark, Intel Atom
￭Gateway
◇Elementi tecnologici di riferimento
￭Consumo energetico
◇Si parla spesso di SOC: System On Chip
￭Integrazione cost effective
◇Può essere realtime

I progetti Embedded IoT sono complessi
•conoscenze
Incompatibile con
la infrastruttura
corrente
•conoscenzeTime consuming da
avviare
•Infrastruttura complessa
•Procedure
Difficile da
mantenere
•Costi
•Infrastruttura complessa
Difficile da
scalare

Makers
◇Board con microcontrolloreArduino
◇Board con microprocessoreRaspberry
◇Prototipazione
￭Verifichiamo che l’idea funzioni
◇Focus on:
￭Programming, Connecting
￭…non sull’elettronica…
◇Non industrial-grade
◇Hanno cambiato il modo di interagire con il mondo embedded
◇Queste schede sono «naturalmente» connesse a Internet
￭Implementano sempre uno stack TCP/IP o almeno una connessione esterna evoluta
(USB)

Boards for makers
Arduino

Industrial-grade Makers
Arduino
Raspberry
Olimex
Toradex

Embedded Device
GPIO
Sensors
Actuators
Board
Edge/Local
Processing
State

IoT Device=Embedded Device + Communication
GPIO Communication
Sensors
Actuators
Board
Edge/Local
Processing
State

Non solo Raspberry…Industruino

Energy ManagementVertical Cloud
MA DI CHI SONO I DATI?

Alternatives
Costs
Performances

Performance of Arduino class devices
◇- The absolute performance power of Arduino device is low
￭Arduino is a microcontroller-based architecture
￭Raspberry Pi is a microprocessor-based architecture
◇+ Pro: Arduino has a light set of running services, light OS

Cost of Arduino class devices
• +Pro: Arduino cost LESS that Raspberry Pi devices
• - You have less resources and services

Arduino language
◇Processing (the IDE - https://processing.org/)
◇JavaScript (inspiration of the language and for Processing)
◇C++ (object syntax, usage, not creation)
◇C (raw performance and binary)

Arduino and Azure IoT Hub
◇Arduino can speak Http, MQTT and AMQP protocols
◇Porting of Azure IoTHub SDK for C

Starting with Arduino
◇https://github.com/arduino/Arduino/
◇https://www.arduino.cc/en/main/software
◇https://azure.microsoft.com/en-us/develop/iot/starter-kits/
◇https://www.adafruit.com/azure
◇https://www.adafruit.com/product/3032

Connecting the sensor
10K Ω
P2
+
-
+
-

+
-
+
-
Connecting the leds
15
Anode(+,longer)
560Ω
560Ω 13
Anode(+,longer)

The result

Setup software per lo sviluppo in Azure
◇Git
◇Visual Studio Code
◇Python
◇Node.js
◇nom

Setup software per Azure
◇Azure CLI 2.0[.19] (https://aka.ms/InstallAzureCliWindows)
◇npm install -g iothub-explorer [1.1.16]

Setup software per Arduino
◇Arduino 1.8.x (1.8.5) da arduino.cc
◇CP210x USB to UART Bridge (COMx)
https://www.silabs.com/products/development-tools/software/usb-
to-uart-bridge-vcp-drivers

Setup Azure
◇Dashboard (Azure IoT Workshop)
◇Resource Group (AzureIoTWorkshop)
◇IoT Hub (AzureIoTWorkshop0000xy)
◇Azure Storage (azureiotworkshop00xy) in minuscolo!!!!
◇Function (azureiotworkshop00xy)

Set current subscription
◇az login
￭https://aka.ms/devicelogin
￭E incolla il codice
◇az account set --subscription “<subscription name>“
◇az show

Create device from command line
◇Az iot hub list
◇az iot device create --hub-name azureiotworkshop00xy --device-
id dev1
◇az iot device show-connection-string --hub-name
azureiotworkshopproto --device-id dev1

Una MCU programmabile Arduino con ESP8266
http://www.instructables.com/id/Programming-ESP8266-ESP-12E-NodeMCU-Using-Arduino-/
https://github.com/esp8266/Arduino/issues/584

Resistenze, tanto per ricordarsi

Rilevare la temperatura con un DHT 11
◇https://learn.adafruit.com/dht

Configuring Azure Services
◇Three functional services
￭Azure Blob Storage
￭Azure Function App
￭Azure IoT Hub
◇One non functional service
￭Azure Resource Group

Why IoT Hub?
◇Devices registration
◇Notification abstraction from implementation (web
sockets/polling)
◇Eterogeneus devices implementation simplified by SDK support
◇Cons
￭External tool to manage device registration

Alternatives to IoT Hub
◇API Apps (App Services)
◇Why not
￭Manual registry implementation
￭Manual two way communication implementation (with web sockets)
￭Manual scaling (at large)

Why Azure Storage?
◇Persisted data handled as a blob in the storage
￭No query requirement
◇Native integration with Functions
￭Trigger

Alternatives to Azure Storage
◇DocumentDb for Json support
◇Why yes
￭Native querying support
◇Why not
￭Blob support

Why Azure Function?
◇Unfrequent access to the function
￭Subsecond billing
◇Event based solution
￭Http Request
￭Blob storage
◇Better code organization
￭Simple Responsibility Principle: 1 function, 1 responsibility

Alternatives to Azure Function
◇API Apps (App Services)
◇Why yes
￭Mature patterns on class-based development
￭Mature ALM with API Apps (Visual Studio experience)
◇Why not
￭Classic hosting plan only
￭Risk on responsibility coupling (too many responsibilities)

Azure Resource Group
◇Mandatory service organization
◇Deployment opportunities
￭Agile deployment
￭Transactional deployment
◇Cons
￭Not simple to learn (but full of advantages)

IP capable devices
Devices Data processing and analytics
Monitoring
Control
IT solution backend
Presentationandbusiness
connectivity
Existing IoT
devices
Low power devices
Generic IoT RequirementsIp
Capable
Devices
Legacy,NonIpCapable
Devices
???
???
???
???
???
???

IoTHub messaging protocols
Legacy
Protocol
Low resource
devices
Intermittent
connection
Device
location

IP capable devices
Field
Gatewa
y
Device connectivity Data processing and analytics
IT solution backend
Cloudgateway
Presentationandbusiness
connectivity
Existing IoT
devices
Low power devices
Generic IoT Solution
Devices
Monitoring
Control

IoT Hub
Device id
What is Azure IoTHub
Device
C2D queue
endpoint
D2C send
endpoint
Device …
Device …
Device…
IoT Hub
management
Device identity
management
D2C receive
endpoint
Methods
endpoint
Twin
endpoint
Twins endpoint
Devices Methods
endpoint
Custom
endpoints
C2D send and
feedback
endpoints
Event processing
(hot and cold path)
Event processing
(hot path)
Device management, device
business logic,
Connectivity monitoring
Device provisioning
and authorization
Field GW /
Cloud GW

IoT Hub features

Telemetry
sending,
acquiring and
measuring
data
Event
State (or
state event)
Message

IoT Hub
Device id
Send/receive data
C2D queue
endpoint
D2C send
endpoint D2C receive
endpoint
C2D send and
feedback
endpoints
Event processing
(hot path)
Device
Client SDKs
• C
• Java
• C# (.Net
Standard
1.3)
• Python
business logic,
Client SDKs
• .Net
• Node
• Java
• Python

Message
Opaque body
Application
Properties
System
Properties

IoT Hub Device Management
Device
Twin
Queries
Methods Jobs

Structured data
◇Device Twins
￭Last known state of device
￭Desired state configuration
￭Group devices
◇Device Direct Methods
￭Invoke method on device from Cloud
￭“Immediate” response

Querying Device Twins
FROM WHERE
SELECT
GROUP
BY

Sample queries
◇Devices located in the US configured to send telemetry less
often that every minute
◇Devices which have wifi o wired connectivity
◇Devices where reported and desired properties do not match

IoT Hub
Structured data
Device
business logic,
Device Twin
Properties
Tags
Desired
Reported
Properties
Desired
Reported
Method

Where does IoT Hub fit in?

Functions «lifestyle»
◇Per event handling
◇Stateless processing
◇Binding approach

IoTHub’s EventHub compatible endpoint
Namespace

IoTHub’s Security Policies
Security Info
SharedAccessKeyNam
e SharedAccessKey

EventHub-like connection string
◇Endpoint=<EventHubNamespace>;SharedAccessKeyName=<
SharedAccessKeyName>;SharedAccessKey=< SharedAccessKey>
￭Add EntityPath=<EventHub name> in case of EventHub Security Policy

EventHub binding
ConnectionStringEventHub name

Where storing a message
Azure
Storage
Azure
DocumentDb
Azure
EventHub
Azure
Queue
Azure
Service
Bus
Azure SQL
Database

Then?
◇The message is stored
◇Storage can be the end of the process
◇Or the beginning of the next step
￭Intermediate processing (a microservices approach)
￭Control/Feedback
◇And you process again in the same way:
￭EventProcessor
￭Azure Stream Analytics
￭Azure Function

Control the devices
◇Cloud-to-device messaging
￭As needed (twin, message, device method)
◇You need to invoke IoT Hub API
￭REST API
C# API
￭Node.js API
◇Low frequency
◇Function is well suited for this

What I choose for my devices?

Generate the symmetric key
DEVICE IOT HUB
C:>az iot device create –hub-name <hubname> --device-id <deviceId>

All devices have different keys
Device Registry

Authorization with encryption
Encrypt( , , )=

Authenticated communication
◇Token based authentication
DEVICE IOT HUB
(TCP endpoint)
TCP Connection

Key invalidation
DEVICE IOT HUB

Wrap Up

Azure IoT Workshop

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