Running UK railway with Eclipse Paho and Eclipse Mosquitto – Eclipse IoT Day ThingMonk 2016

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Video recording: https://www.youtube.com/watch?v=OTbpUbTO5_I A success story of using MQTT and Eclipse IoT components in DeltaRail's state-of-the-art signalling control system. Overview of the architecture, lessons learnt and best practises in using MQTT for highly reliable, high-throughput, low-latency messaging in a safety-related environment.

Technology

Running UK railway with
Eclipse Paho & Mosquitto
Presented by: Kamil Baczkowicz, September 2016

Agenda
Running UK railway with Eclipse Paho & Mosquitto 2
• Signalling in 60 seconds
• IECC Scalable
 Overview
 Architecture
• Eclipse IoT components
 Eclipse Paho (Java Client & mqtt-spy)
 Eclipse Mosquitto
• Lessons learnt & best practices

Running UK railway with Eclipse Paho & Mosquitto 3
• Tracks
• Signals
• Points (switches)
• Routes
• Interlockings
Signalling concepts

Running UK railway with Eclipse Paho & Mosquitto 4
Evolution of interlockings

IECC Scalable
Running UK railway with Eclipse Paho & Mosquitto 5

IECC Scalable architecture
Running UK railway with Eclipse Paho & Mosquitto 6
 High availability (99.9995%)
 Hardware & software
redundancy
 Low maintenance
 High-throughput &
low-latency messaging

Running UK railway with Eclipse Paho & Mosquitto 7
• Java Client
– Synchronous and asynchronous APIs
– Highly resilient
• mqtt-spy
– Simple pub/sub
– Advanced filtering & scripting
– Decoding custom message formats
• mqtt-spy-daemon
– Command line (no GUI)
– Aimed at automated testing
– XML configuration & Java API

Running UK railway with Eclipse Paho & Mosquitto 8
• Lightweight, production-grade MQTT
broker (server implementation of the
MQTT protocol)
• High throughput & low latency
messaging
• Since first deployment, over 20 000
hours of service without interruption

Lessons learnt & best practices
Running UK railway with Eclipse Paho & Mosquitto 9
• Pub/sub vs point-to-point
• QoS 0 (fire & forget) vs QoS 1&2 (persistent)
 Performance
 Maintenance
 Data loss & retry
• Payload compression (XML / JSON)
• Testability (intercepting & injecting)
• Test automation (functional & performance)

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M2M is rapidly growing and since its early days different "standard" protocols have emerged (e.g. OMA-DM, TR-069, MQTT, ...) or are emerging (e.g. CoAP or Lightweight M2M). Understanding which protocol to use for which application can be intimidating, therefore we propose to give an overview of these protocols to help you understand their goals and characteristics. We will give a status of the availaible open source implementations in the Eclipse M2M ecosystem, with projects such as Paho, Mihini and Ponte. We'll present common M2M use cases and why they usually require more than just one protocol, and discuss whether the current portfolio of available M2M protocols possibly allows to forge "one protocol to rule them all".

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1. Running UK railway with Eclipse Paho & Mosquitto Presented by: Kamil Baczkowicz, September 2016

2. Agenda Running UK railway with Eclipse Paho & Mosquitto 2 • Signalling in 60 seconds • IECC Scalable  Overview  Architecture • Eclipse IoT components  Eclipse Paho (Java Client & mqtt-spy)  Eclipse Mosquitto • Lessons learnt & best practices

3. Running UK railway with Eclipse Paho & Mosquitto 3 • Tracks • Signals • Points (switches) • Routes • Interlockings Signalling concepts

4. Running UK railway with Eclipse Paho & Mosquitto 4 Evolution of interlockings

5. IECC Scalable Running UK railway with Eclipse Paho & Mosquitto 5

6. IECC Scalable architecture Running UK railway with Eclipse Paho & Mosquitto 6  High availability (99.9995%)  Hardware & software redundancy  Low maintenance  High-throughput & low-latency messaging

7. Running UK railway with Eclipse Paho & Mosquitto 7 • Java Client – Synchronous and asynchronous APIs – Highly resilient • mqtt-spy – Simple pub/sub – Advanced filtering & scripting – Decoding custom message formats • mqtt-spy-daemon – Command line (no GUI) – Aimed at automated testing – XML configuration & Java API

8. Running UK railway with Eclipse Paho & Mosquitto 8 • Lightweight, production-grade MQTT broker (server implementation of the MQTT protocol) • High throughput & low latency messaging • Since first deployment, over 20 000 hours of service without interruption

9. Lessons learnt & best practices Running UK railway with Eclipse Paho & Mosquitto 9 • Pub/sub vs point-to-point • QoS 0 (fire & forget) vs QoS 1&2 (persistent)  Performance  Maintenance  Data loss & retry • Payload compression (XML / JSON) • Testability (intercepting & injecting) • Test automation (functional & performance)

Running UK railway with Eclipse Paho and Eclipse Mosquitto – Eclipse IoT Day ThingMonk 2016

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