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Extending LabVIEW to the Web Using the LabSocket System John Bergmans Bergmans Mechatronics LLC National Instruments LabVIEW User Group Meeting Huntsville, AL Nov 13, 2013. 1616 Bedford Lane, Unit Aphone: 714-474-8956 Newport Beach, CA 92660web: bergmans.com. Bergmans Mechatronics LLC.

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Extending LabVIEW to the Web Using the LabSocket System John Bergmans Bergmans Mechatronics LLC

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Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Extending LabVIEW

to the Web Using the

LabSocket System

John Bergmans

Bergmans Mechatronics LLC

National Instruments LabVIEW User Group Meeting

Huntsville, AL

Nov 13, 2013

1616 Bedford Lane, Unit Aphone: 714-474-8956

Newport Beach, CA 92660web: bergmans.com


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

Current Approaches to Remote LabVIEW Access

  • Native Client App

    • Use TCP/IP sockets, LabVIEW shared variables, or .NET, to transmit data between client and LabVIEW

    • Requires custom client development and modifications to LabVIEW app

  • LabVIEW Remote Panels

    • Requires LabVIEW Run-Time Engine (RTE) and browser plug-in on client platform

  • LabVIEW Web Services

    • Data transferred between application and client using the HTTP request-response model (REpresentative State Transfer (REST) architecture)

    • Requires development of client software using Web languageseg. HTML/JavaScript

  • LabVIEW Web UI Builder (http://www.ni.com/uibuilder/)

    • Build and run apps in browser using reduced-capabiliy LabVIEW

    • Requires Silverlight plug-in (runs on Windows and Mac OS X)

  • Data Dashboard for LabVIEW

    • Requires development of user interface and linking UI to block diagram

    • Limited to iOS, Android, Windows 8 and Windows Phone devices


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

LabSocket System

WebSocket

Interface

(Over TCP-IP)

HTTP Server

“Target VI”

Browser

TCP-IP

Socket

Interface

Message Broker

LabSocket Support VIs

Browser

LabVIEW Host Platform

LabSocket Server

Platform

Browser

  • LabSocket Support VIs

  • Startup

    • - LabVIEW Front Panel screenscrape, send HTML and JavaScript code to HTTP server

  • Continous Operation

    • - Transmit updates of LabVIEW front panel to browser

    • - Update LabVIEW front panel when user generates events in browser

HTML5 WebSockets enable automatic replication of LabVIEW front panel in a browser without plug-ins


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

Other Configurations

WebSocket

Interface

(Over TCP-IP)

HTTP Server

“Target VI”

Browser

TCP-IP

Socket

Interface

Message Broker

LabSocket Support VIs

Browser

LabVIEW Host Platform

LabSocket Server

Platform (VM)

Browser

PC on LAN

WebSocket

Interface

(Over TCP-IP)

HTTP Server

“Target VI”

Browser

TCP-IP

Socket

Interface

Message Broker

LabSocket Support VIs

Browser

LabSocket Server

Platform (VM)

Browser

LabVIEW Host Platform


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

XY Graphs

LabVIEW Front Panel

Browser Representation


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

Waveform Charts

LabVIEW Front Panel

Browser Representation


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

Waveform Graphs

LabVIEW Front Panel

Browser Representation


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

MultiColumn ListBoxes

LabVIEW Front Panel

Browser Representation


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

LabSocket Start VI

Context Help

Tools Palette


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

Authentication

  • Authentication=T forces users to enter credentials

  • User authentication managed by ActiveMQ message broker


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

Moodle Integration

  • Option for integration with MOODLE Course Management System - https://moodle.org/

  • application_type = moodle_integration places web page in moodle file structure

LabVIEW Front Panel

LabSocket iframe in Moodle Lesson


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

Remote Cascade Lab - KTH Royal Institute of Technology (Sweden)

  • Objective: to perform tests on turbine airfoils

  • LabVIEW software used to control test rig

  • LabSocket system enables lab testing to be performed remotely using browser

  • Remote control of rig aided by use of web cam

  • 70 students have operated rig remotely with LabSocket system to date (60 in groups of 3-6 and 10 individually)

  • Lab part of EU funded Virtual Campus Hub project

Live Traverse Results

GUI Main View

Additional information at: http://www.energy.kth.se/proj/projects/Remote_labs/RL/RL_website/RCL/RCL.html


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

“Multi-Pack” Systems for TEMPUS Program

  • TEMPUS: EU Program for modernization of higher education programs in Eastern Europe, Central Asia, Western Balkans and Mediterranean - http://eacea.ec.europa.eu/tempus/

  • “Multi-Pack” systems (eg. “Twin-Pack”, “Five-Pack”, etc) to be delivered as complete sets to TEMPUS partner university labs

  • Integration with MOODLE Course Management System - https://moodle.org/


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

SportJury – First Commercial LabSocket Application

  • Distributed, multi-user application for judging ski competitions

  • Used successfully at 2011 Swiss Snow Happening in Saas-Fee, Switzerland

  • Developed by Dynasys, D. Kölliker (Neuenegg, Switzerland) www.dynasys.ch

iPod touch browser screenshots

Swiss Snow Happening judges entering score data on iPod touch devices

Data aggregated on central PC


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

LabSocket-RT

  • Special version for access to applications on LabVIEW Real-Time platforms

  • Support for reduced set of Front Panel elements

  • Possible use case: RT application monitoring / debugging

“Target VI”

LabSocket-RT Converter

Step 2 LabSocket-RT Converter inserts Block Diagram Interface VIs into “Target VI” copy

Step 3 “Target VI” Copy

manually deployed to RT Host

“Target VI” Copy

Block Diagram Interface VIs

LabVIEW Development PC

Step 1 LabSocket-RT Converter copies

HTML and JS to HTTP Server

“Target VI” Copy

Block Diagram Interface VIs

HTTP Server

WebSocket

Interface

(Over TCP-IP)

TCP-IP

Socket

Interface

Message Broker

LabSocket Support VIs

Browser

LabVIEW RT Host Platform

VM or Physical Server


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

LabSocket-RT

  • LabSocket RT Converter modifies copy of Target VI block diagram

  • Start Converter from Tools > LabSocket RT > LabSocket RT Converter …

  • Target copy manually added to project, included in build, and deloyed to RT plaform

LabVIEW RT Project

LabSocket RT Converter


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

LabSocket-RT

  • Converter replaces front panel elements in block diagram with “Block Diagram Interface VIs”

Block Diagram Interface VIs

Demo1_RT.vi

Demo1.vi


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

LabSocket-RT

Screenshots

Demo1.vi Front Panel (Idle)

Chrome Browser on Mac

Chrome Browser on iPhone


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

More Information and Downloadable Demos

labsocket.com

Contact

  • John Bergmans

  • Bergmans Mechatronics LLC

  • phone: 714-474-8956

  • e-mail: [email protected]

  • web: bergmans.com

  • twitter: @jbergmans


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

Extra Slides


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

LabSocket Details

  • Dynamically replicates LabVIEW front panel element values and properties such as color, visibility, disabled state, etc.

  • Compatible with desktop and mobile browsers that have native WebSocket support (including Safari browser in iPhone, iPod touch and iPad). Option available for browsers without WebSocket support.

  • Two possible architectures

    • Basic – one LabVIEW front panel replicated in one or more browsers

    • Multi-Client – multiple unique copies of a LabVIEW VI each connect to one or more browsers

  • Two platforms for LabSocket Server

    • Customer Server (LAN or cloud)

    • LabSocket Cloud

  • Additional information and downloadable evaluation system at www.labsocket.com


Extending labview to the web using the labsocket system john bergmans bergmans mechatronics llc

Bergmans Mechatronics LLC

Element Test VI

LabVIEW Front Panel

Browser Representation


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