This presentation throws some light on MQTT as an Internet of Things protocol, its significant features and shifts the paradigm with the reality check. Featured use-cases magnify its simplicity of implementation. Loop by Litmus Automation is an end-to-end cloud platform for IoT, www.litmusautomation.com.

1. MQTT in the Internet of Things
Vatsal Shah | Founder & CEO, Litmus Automation
Internet of Things World
June 16th-18th, 2014 | Palo Alto, USA
@vatsal1212
@LAutomation

2. Founder | CEO of Litmus Automation
Vatsal Shah
Loves IoT
Industrial Automation guy
@vatsal1212
vatsal@litmusautomation.com
OSS supporter

3. MQTT as an IoT Protocol.
Features of MQTT.
MQTT: Myths vs. Reality.
MQTT: Practical Implementations.
Agenda

4. What is the talk of the town?

5. 3,000,000,000 User Interfaces
by 2022.
14,000,000,000 Connected
Devices.Billion
Fourth Industrial Revolution
Sources: Bosch Blog 2014, Machina Research, 2014 and Cisco VNI Mobile Forecast Highlights 2012-2017

6. Lets look at how things TALK.
Their Language = Protocol
Speak/listen only when needed
Able to communicate with all
Avoid getting drained by talking
Ideal Communication
Able to talk in all situations

7. The Battlefield
of Protocols.
Cluttered & No Single Direction
HTTP | AMQP | MQTT | XMPP | Others

8. Foundation and
Community.
Late 1990s
Aug 2010
Nov 2011
Feb 2013
Invented by IBM and Eurotech
Protocol spec published royalty-free
Joined hands with Eclipse M2M group
Proposed as an OASIS standard

9. MQTT
Message Queuing Telemetry Transport
Publish Subscribe
MQTT
Broker
Simple, Asynchronous (“push”) delivery of messages through Pub/Sub Architecture
Mob Apps
Dashboard System
Other devices
Data Storage
Enterprise
Applications
Different
Devices
and
Applications
1-1 , 1 - N or N – 1 flexible Pub/Sub structure

10. Lightweight (network)
Binary Protocol | Minimum Overhead | 2 bytes

11. Low bandwidth | Copes with Slow N/W
Made for Unreliable Networks

12. Lightweight (CPU)
Large & Small devices | Many languages

13. Quality of Service Levels
Publisher Subscriber
Publish Publish
Delete Message
QoS 0: At most once
Fire and Forget
Loop Broker
Publish

14. Quality of Service Levels
Publisher Subscriber
Publish Publish
Delete Message
QoS 1: At least once
Reliable mode
Loop Broker
Publish + PubAck
Store Message
Store
Delete

15. Quality of Service Levels
Publisher Subscriber
Publish Publish
Delete Message
QoS 2: Exactly once
Safest but slowest
Loop Broker
Publish + PubRec + PubRel + PubComp
Store Message
Store
Delete
Pub Complete

16. 1 {
2 mqtt.connect();
3 mqtt.publish();
4 mqtt.subscribe();
5 mqtt.unsubscribe();
6 mqtt.disconnect();
7 }
8
9 Simple
Simple to implement | No SDK nightmares

17. Wildcard Subscription
Plant 1
Machine 1 Machine 2
Plant 1
Machine 1 Machine 2
Plant 1 / # Plant 1 / Machine 1 / +Plant 1 / + / Database
Plant 1
Machine 1 Machine 2
Multiple subscriptions | Easy client design

18. Last Will and Testament
Broker caches & publishes on death

19. MQTT: Myths vs. Reality

20. Broker is the Single Point of Failure
Broker Cluster | Replication of states | Failover
Myth1

21. Security in MQTT is difficult
SSL / TLS | Application layer | Privacy policies
Made for devices
Myth2

22. MQTT Payload Agnostic is an issue
Big advantage for devices | Adaptability
Myth3

23. MQTT is not Scalable
`
Myth4
Horizontal | Vertical | Across Datacenters

24. Getting off the ground: MQTT Use Cases
Immobile: Factory Floor | Mobile: Container

25. Challenges
Immobile: Factory Floor
• Robust communication
• Existing standards / Retrofitting
• Large data chunk
• Security is the primary concern
Mobile: Container
• Bandwidth , bandwidth , bandwidth
• Small session length
• Inaccuracy in sensor readings
• Power

26. Factory Floor
MQTT
Broker
Machine 1
Machine 2
Machine 3
Weather
Station
ERP System
Inventory
Mgt System
LED Boards
SCADA
HMI
MongoDB
Database
WiFi
Ethernet
2G
WiFi

27. Factory Floor
MQTT
Broker
Machine 1
Machine 2
Modbus /RS485
CPU
Modbus /RS485
CPU
PubSub
PubSub
Protocol
Mapping
Protocol
Mapping

28. Factory Floor: Machine 1
Temperature Plant / Machine 1 / Temp_serial#
Counter Plant / Machine 1 / Counter_serial#
Counter Set Plant / Machine 1 / Counter_control_Serial#
Stop Plant / Machine 1 / Stop_serial#
Logs Plant / Machine 1 / Logs_serial#
Consumption Plant / Machine 1 / Consumption_serial#
Power Plant / Machine 1 / Power_serial#
QoS 1
QoS 2
QoS 2
Sensor to Topic mapping (Existing Modbus)
QoS 0
QoS 1
QoS 1
QoS 2

29. Perishable goods tracking
MQTT
Broker
SCM System
Goods
health logic
Android
application
Real-time
dashboard
(LoopBoards)
Cassandra
Database
2G / 3G

30. Perishable goods tracking
MQTT
Broker
Truck 1
CANBus
mapping
CPU
2G / 3GTemperature
Humidity
Precise Location
Data Storage

31. Let’s choose the best for them.
Things
We didn’t have a choice to
customize our language.

32. Lets get Looped!
litmusautomation.com
@litmusautomation
@LAutomation
@Litmus Automation
Thank You
(It’s Free!)