Appetizers, Windows Embedded Compact and the Internet of Things

IoT

Paolo Patierno

Microsoft MVP Windows Embedded / IoT

[email protected]

@ppatierno

12/3/2014 1

mailto:[email protected]

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Who am I ? Contacts

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• Senior Software Engineer

• Microsoft MVP Windows Embedded / IoT

• «Embedded101» board of director member

– http://www.embedded101.com/Blogs/PaoloPatierno.aspx

• «DotNetCampania» member

– http://dotnetcampania.org/blogs/paolopat/default.aspx

• «TinyCLR.it» member

– http://www.tinyclr.it

• Linkedin

– http://it.linkedin.com/in/paolopatierno

• AllSeen Alliance «sponsored» member for AllJoin project

• Eclipse «committer» for Paho project

http://www.embedded101.com/Blogs/PaoloPatierno.aspx

http://dotnetcampania.org/blogs/paolopat/default.aspx

http://www.tinyclr.it/

http://it.linkedin.com/in/paolopatierno


T I

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CLOUD ?


IoT Communication Patterns

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Telemetry

Information flowing

from a device to other

systems for conveying

status of device and

environment

Inquiries

Requests from devices

looking to gather

required information or

asking to initiate

activities

Commands

Commands from

other systems to a

device or a group of

devices to perform

specific activities

Notifications

Information flowing

from other systems

to a device/group for

conveying status

changes in the world

1:N 1:N


Challenges

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• Connectivity

– Addressability

– Heterogeneity

– Security

– Efficient Scale

• Messaging

– Telemetry

– Notifications

– Command/Query and Inquiries


Why messaging ?

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• Asynchronous – decouple sender and receiver

• Patterns – Publish/Subscribe

– Request/Reply (with correlation)

• Message durability and devices availability – Temporal decoupling

• High rate traffic and high data throughput

• Big Data analysis and backend with its own pace – Load leveling

– Load balancing

• Reliability and QoS

• Scalability


Service-Assisted Communications

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Device Gateway – Reykjavik project

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• IoT Gateway in the Cloud

• Based on Azure services : Service Bus

– Queues

– Topics/Subscriptions

– Event Hubs

• Will be released as open source on

GitHub


Device Gateway – Reference Architecture

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How it works

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• Devices connect via open standard protocols

– AMQP 1.0 and HTTP supported natively by the Service Bus

– MQTT, CoAP and others can be implemented via custom

gateway/adapter model

– Sockets secured via TLS (or a lightweight variant)

• Devices connect via proprietary protocols

– Custom protocol gateway needed for it

• Devices not IP capable connected by a field gateway


How it works

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• Each device has a dedicated Inbox/Outbox on the Gateway

– Device sends telemetry/alerts and routes service invocations via its Inbox

– Device receives commands and queries from its Outbox

– Correlated request/reply patterns can be implemented on top of these two messaging channels

– The device knows, and has access to, only its own specific Inbox/Outbox endpoints (URI’s)

Backend

Components

Device Gateway

Outbox

Inbox

Co

mm

an

d A

PI

Pro

toco

l H

ead


Telemetry with Azure Service Bus

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• Parallel processing

• Different QoS levels

• Load balancing


Commands with Azure Service Bus

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• Delivery timeout

• Spotty connectivity

• Traverse NAT/firewall


Azure Intelligent System Services

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• http://www.microsoft.com/windowsembedded/en-us/intelligent-systems-service.aspx

• Connection for heterogeneous devices

• Telemetry, alarms and commands

• Monitoring, control and analysis

• Currently in limited public preview

https://www.youtube.com/watch?v=NYpdNGl1hco

http://www.microsoft.com/windowsembedded/en-us/intelligent-systems-service.aspx









Appetizers, Windows Embedded Compact and the Internet of Things

Technology

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