CON5260 Creating a Java Internet of Things Gateway

8/18/2019 CON5260 Creating a Java Internet of Things Gateway

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Creating a Java Internet of

Things Gateway

David Woodard, Eurotech


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Internet /TCP/IP

EthernetWiFi

3G /LTE Satellite

WiMAXOther

... But it gets complex

Business

Application

Sensors,

Actuators,

Displays,!

•

Multiple services on the

gateway / edge node

• Different connectivity options

• More than one kind of vertical

market value proposition

• Customer specific

business logic

2G /2.5G

xDSL

Cable


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... More complexity with multiple

consumers

@Business

Applications

Sensors,

Actuators,

Displays,!

?


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IoT Architectures

BusinessApplications

Sensors,

Actuators,

Displays,!

@

Application

Framework

+

Multi-Service

Gateway

M2M/IoT Integration Platform on Cloud

M2M

IntegrationPlatform


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IoT Gateway StackIncrease productivity and lower time to market

OSGi

on

Linux

Hardware

Java SE Embedded

CodeCode

Code

D e v e l o p e r ’ s P

r o d uc t i v i t y


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Birth of

• June 16,2013

• December16, 2013

v0.7.0• August14,

2014

• September25, 2014


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Linux OS

Embedded App

Simplify the design, deployment and remote

management of embedded applications.

• Modular software components

• Manage cloud connectivity

• Configure the network, such as Wi-Fi and

cellular bearers, firewalling and routing, etc.• Support different protocols to connect to

different servers or devices (ex. MQTT, Serial,

Modbus, CANBus).

• Allow for remote application and device

management and configuration.

• Cohesive and integrated ensuring application

portability

Java / OSGi

Open HWIndustrial

HW

Eclipsewww.eclipse.org/kura


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Services

Java SE 7 (Oracle Java SE Embedded, OpenJDK)

OSGi Application Container (Eclipse Equinox, Concierge)

Device Abstraction

javax.comm

Basic Gateway Services

DB Service

Clock Service

Device Profile

Watchdog

Network Configuration Network Configuration

Field ProtocolsConnectivity and Delivery

Data Services MQTT Paho

A d m i n i s t r a t i o n G

U I

Applications

Your Application

R e m o t e M a n a g e m

e n t

C o n f i g u r a t i o n

M a n a g e m e n t

javax.usb / udev

Cloud Services

Your Application

Firewall,Port Forwarding

Link MonitorsCellular, Wi-Fi,

Ethernet

GPS Position GPIO / SPI / PWM / I2C

Modbus

CANBus

Custom Protocols

U p d a t e s

M a n a g e m e n t

R e m o t e A c c e s s

( V P N )


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Developer’s Experience

Emulate on PC Deploy on Target Cloud Managed

Start developing your IoT /

M2M application in thecomfort of your PC.

• Full Eclipse Integration

• Target Platform Definition

• Emulated Services

•

Run/Debug from Eclipse• Support Mac/Linux Hosts

When you are ready, deploy

your application on thegateway.

• One-click Deployment

• Eclipse Plugin

• Remote Debugging

Provision and manage your

applications in field devicesfrom the Cloud.

• Remote OSGi

Management via MQTT

• Web-based Console


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Kura Data Transport Optioins

•

DataTransportService

–

Available for standard MQTT messaging. Allows consumers of theservice to connect to brokers, publish messages, and receive

messages on subscribed topics

•

DataService

–

Delegates data transport to the DataTransportService

–

Provides extended features for managing broker connections,buffering of published messages, and priority based delivery of

messages

•

CloudService

–

Further extends the functionality of DataService.

–

Provides means for more complex flows (i.e. request/response)

–

Manages single broker connection across multiple applications

–

Provides payload data model with encoding/decoding serializers

–

Publishes life cycle manages for devices and applications


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Kura Configurable Component


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Kura Configurable Component

Applications implementing

ConfigurableComponent will be available

in Kura UI

Atributes configured in XML appear in

form panel


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Network Services


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Greenhouse Demo Architecture

Temperature Sensor

Humidity Sensor

Light Sensor

I 2 C

GPIO


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OSGi Services

•

CloudClientListener (From Kura)

–

Provided service for handling messaging events (connectionestablished, message arrived, message sent, etc.)

•

CloudService (From Kura)

–

Consumed service to manage connection to cloud across multiple

applications, publish life cycle messages, serialize/deserialize

compressed data payload, and more.

•

SensorChangedListener (From Application)

–

Provided service to send MQTT message once a sensor has

detected a change

•

GreenhouseSensorService (From Application) –

Provided service for getting values from sensors and setting

actuator values (i.e. – LED)


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Greenhouse Application

public class GreenhousePublisher implements ConfigurableComponent,

CloudClientListener, SensorChangedListener {

private static final String APP_ID = "greenhouse-demo";

_cloudClient = _cloudService.newCloudClient( APP_ID);

_cloudClient.addCloudClientListener(this);

@Override public void onConnectionEstablished() {

_cloudClient.subscribe("#", 0);

}

@Override

public void sensorChanged(String sensorName,Object newValue) {

KuraPayload payload = new KuraPayload;

payload.setTimestamp(new Date());

payload.addMetric("value", newValue);

int messageId = cloudClient.publish(topic, payload,

qos, retain, 2);

}

}


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GreenhouseSensorService

public class Pi4JGreenhouseSensorService implements

GreenhouseSensorService {

_gpioController = GpioFactory.getInstance ;

_i2cbus = I2CFactory.getInstance (I2CBus.BUS_1;

_temperatureSensor = _i2cbus.getDevice(0x40);

_lightActuator = _gpioController.provisionDigitalMultipurposePin( RaspiPin.GPIO_00, "led”, PinMode.DIGITAL_OUTPUT);

@Override

public void setActuatorValue(String actuatorName, Object value){

_lightActuator.setState("on".equals(value));

notifyListeners("light", value);

}

}


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Eurotech Everyware Cloud


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Business Logic


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MQTT Topics and Payloads

javaonedemo

sensors actuator

•

Timestamp•

Metrics:

• value

• warn

•

Timestamp• Metrics:

• value

Kura Payload Kura Payload

temperature humidity lux light


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on

Everyware Software Framework (ESF) Kura & ESF

Linux OS

Java/OSGi

on

Elements outside

the scope of Kura

Linux OS

Java/OSGi

on

on

ESF now builds on Kura,

with the addition of

commercial support and

extra features:

• Everyware Cloud remote

management and logging

•

Diagnostic• Everyware VPN

• Field Protocols

• Bundles for specific

vertical applications

• Device provisioning

Core Elements of ESF, a provenapplication framework for embedded

devices form the basis for Kura


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You are important!

•

Learn More - come visit us on the Exhibition Floor: –

Eurotech Booth

–

Eclipse Booth

•

Contribute!www.eclipse.org/kura


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www.eurotech.com

Thank You!

Documents

CON5260 Creating a Java Internet of Things Gateway