Extending LabVIEW to the Web Using the LabSocket System (Bay Area LV UGM Nov 19 2013)

Extending LabVIEW to the Web Using the LabSocket System

John Bergmans, CLD

Bergmans Mechatronics LLC

Bay Area LabVIEW User Group MeeDng

Santa Clara, CA Nov 19, 2013

B e r g m a n s M e c h a t r o n i c s L L C

1616 Bedford Lane, Unit A bergmans.com Newport Beach, CA 92660 @jbergmans


Current Approaches to Remote LabVIEW Access 1.  Na%ve Client App

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

•  Requires custom client development and modificaDons to LabVIEW app

2.  LabVIEW Remote Panels •  Requires LabVIEW Run-‐Time Engine (RTE) and browser plug-‐in on client pla]orm

3.  LabVIEW Web Services •  Data transferred between applicaDon and client using the HTTP request-‐response model (REpresentaDve State Transfer (REST) architecture)

•  Requires development of client so_ware using Web languages eg. HTML/JavaScript

4.  LabVIEW Web UI Builder (hGp://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)

5.  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


LabSocket System

Browser

LabSocket Server Platform

HTTP Server

Message Broker

“Target VI”

LabSocket Support VIs

LabVIEW Host Platform

Browser

Browser

WebSocket Interface

(Over TCP-IP)

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


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

Con+nous Opera+on -‐ Transmit updates of LabVIEW front panel to browser -‐ Update LabVIEW front panel when user generates events in browser

TCP-IP Socket

Interface


Other ConfiguraDons

Browser

LabSocket Server Platform (VM)

HTTP Server

Message Broker

“Target VI”



Browser

Browser

WebSocket Interface

(Over TCP-IP)

TCP-IP Socket

Interface

Browser

LabSocket Server Platform (VM)

HTTP Server

Message Broker

“Target VI”



Browser

Browser

WebSocket Interface

(Over TCP-IP)

TCP-IP Socket

Interface

PC on LAN


Demo ConfiguraDon

Browser

LabSocket Server Platform

HTTP Server

Message Broker

“Target VI”


MacBook Pro

Browser

Browser

WebSocket Interface

(Over TCP-IP)

TCP-IP Socket

Interface

Server in San Jose, CA

Amazon EC2 Instance in Northern VA


Graphing

LabVIEW Front Panel Browser RepresentaDon


MulDColumn ListBoxes



LabSocket Start VI Tools Palede Context Help


AuthenDcaDon •  Authen'ca'on=T forces users to enter credenDals •  User authenDcaDon managed by AcDveMQ message broker


Moodle IntegraDon

LabVIEW Front Panel LabSocket iframe in Moodle Lesson

•  OpDon for integraDon with MOODLE Course Management System -‐ hdps://moodle.org/

•  applica'on_type = moodle_integra'on places web page in moodle file structure


Remote Cascade Lab -‐ KTH Royal InsDtute of Technology (Sweden)

GUI Main View Live Traverse Results

•  ObjecDve: to perform tests on turbine airfoils •  LabVIEW so_ware used to control test rig •  LabSocket system enables lab tesDng 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

AddiDonal informaDon at: hdp://www.energy.kth.se/proj/projects/Remote_labs/RL/RL_website/RCL/RCL.html


SportJury – First Commercial LabSocket ApplicaDon

!iPod touch browser screenshots

Swiss Snow Happening judges entering score data on iPod touch devices

Data aggregated on central PC

•  Distributed, mulD-‐user applicaDon for judging ski compeDDons •  Used successfully at 2011 Swiss Snow Happening in Saas-‐Fee, Switzerland •  Developed by Dynasys, D. Kölliker (Neuenegg, Switzerland) www.dynasys.ch


browser

HTTP Server and Message

Broker

One or More Desktop or Mobile Devices on public

Internet (Lab 1)

LabVIEW Host PC (192.168.1.101)

LabVIEW

Target VI 1 LabSocket Support VIs

ELVIS

LabSocket Server PC (XX.XX.XX.02)

Lab 1

browser


Internet (Lab 2)

browser


Internet (Lab 5)


LabVIEW

Target VI 2 LabSocket Support VIs

ELVIS

Lab 2


LabVIEW

Target VI n LabSocket Support VIs

ELVIS

Lab 5 ! !

Lab 1 Data

Lab 2 Data

Lab 5 Data

HTTP Server

MOODLE Server PC (XX.XX.XX.01)

“MulD-‐Pack” Systems for TEMPUS Program •  TEMPUS: EU Program for modernizaDon of higher educaDon programs in Eastern Europe, Central Asia, Western Balkans and Mediterranean -‐ hdp://eacea.ec.europa.eu/tempus/

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

•  IntegraDon with MOODLE Course Management System -‐ hdps://moodle.org/


LabSocket-‐RT LabSocket for LabVIEW Real-‐Time


LabSocket-‐RT

HTTP Server

Message Broker

“Target VI” Copy


LabVIEW RT Host Platform

Browser

WebSocket Interface

(Over TCP-IP)

TCP-IP Socket

Interface

Block Diagram Interface VIs

“Target VI”

LabSocket-RT Converter

LabVIEW Development PC

“Target VI” Copy


Step 1 LabSocket-RT Converter copies HTML and JS to HTTP Server

Step 3 “Target VI” Copy manually deployed to RT Host

VM or Physical Server

Step 2 LabSocket-RT Converter inserts Block Diagram Interface

VIs into “Target VI” copy

•  Special version for access to applicaDons on LabVIEW Real-‐Time pla]orms

•  Support for reduced set of Front Panel elements •  Possible use case: RT applicaDon monitoring /

debugging


LabSocket-‐RT •  Converter replaces front panel elements in block diagram with “Block

Diagram Interface VIs”

Demo1.vi Demo1_RT.vi



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

LabSocket RT Converter

LabVIEW RT Project


LabSocket-‐RT

Chrome Browser on Mac

Chrome Browser on iPhone

Demo1.vi Front Panel (Idle)

Screenshots


Closing Notes

•  Coming soon: LabSocket on LabVIEW Tools Network

•  Possible framework for custom or more complex applicaDons •  Consider: LabVIEW / LabSocket as dynamic web authoring system (NoFlo alternaDve) •  What other applicaDons can be enabled by WebSockets?


Contact John Bergmans Bergmans Mechatronics LLC phone: 714-‐474-‐8956 e-‐mail: [email protected] web: bergmans.com twider: @jbergmans

More InformaDon and Downloadable Demos labsocket.com


Extra Slides


LabSocket Details

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

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

•  Two possible architectures

•  Basic – one LabVIEW front panel replicated in one or more browsers •  MulD-‐Client – mulDple unique copies of a LabVIEW VI each connect to one or

more browsers

•  Two pla]orms for LabSocket Server •  Customer Server (LAN or cloud) •  LabSocket Cloud

•  AddiDonal informaDon and downloadable evaluaDon system at www.labsocket.com


Element Test VI



Waveform Charts



Waveform Graphs


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Extending LabVIEW to the Web Using the LabSocket System (Bay Area LV UGM Nov 19 2013)

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