Extract device from physical channel

As always I want to do something absolutely trivial and am running into all sorts of issues
I define (through a control) a physical channel that I want to take data on. I want to be able to programmatically reset the device the channel is on. i.e. i don't want someone to have to open up the code and change the device on the reset vi if necessary. Even if there is only one device physically connected, you can’t guarantee the device will be Dev1, because Labview keeps a history of devices that have been plugged in. The obvious solution – extract the device name from the physical channel control which contains the channel(s) you have selcted. Can I find a trivial way to do it, NO! There is a property node called device but it does not (despite its name) return the device you have selected along with the physical channel. There are convoluted ways of doing this, but i'm hoping there is some easy way. Suggestions
Solved!
Go to Solution.

I think this might be the "trivial" way you're looking for: some string pattern matching and a simple
regular expression to extract the device name prefix from a physical channel name.
-Kevin P

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Not able to run a program to extract news from news channel websites.

Let me start with stating the fact that I am a super greenhorn, so please be ultra elaborate with the answers .
This is my code, I copied it from Mr. Alvin Alexander (http://alvinalexander.com/java/edu/pj/pj010011?). I am trying to use it to extract news from news channel websites.
I used the following URLs:
1.http://in.reuters.com/
2.http://timesofindia.indiatimes.com/
3.http://www.hindustantimes.com/
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// A Java program that demonstrates a procedure that can be //
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// Code created by Developer's Daily //
// http://www.DevDaily.com //
import java.io.*;
import java.net.*;
public class JavaGetUrl {
public static void main (String[] args) {
// Step 1: Start creating a few objects we'll need.
URL u;
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try {
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// Note: Put your real URL here, or better yet, read it as a //
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// Step 5: //
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This is the error i am getting, every time I run it on Eclipse:
Oops- an IOException happened.
java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.URL.openStream(Unknown Source)
at JavaGetUrl.main(JavaGetUrl.java:33)
Also, when I try a local server URL, the output screen goes blank, which I guess is due to lack of Text on the local URL. So, the little research that I did, made me believe that the code not running on external server was due to firewall on the server side. Please help me run it. Also : I work on a proxy network.( if that has something to do with this).
P.S : Advanced gratitude for any assistance.

any decently secured server would reject such a blatant attempt to steal its content.

Extract Devices from Ciscoworks LMS 4.2 to Nagios database

Hello everyone,
I'm working on ciscoworks LMS 4.2 and as part of a project I need to extract all of my devices to a Nagios Database.
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I am not an expert in Nagios, so no idea on what options does it have to import devices.
In LMS, you have an option to export devices and its credentials list in .csv and xml format. Please check if you can use any one of those to get imported on Nagios.
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You should check the possible option on Nagios to import devices and than ask if that is available on LMS.
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HT201304 It would be tremendously helpful to be able to access, set restrictions, and make changes from the parents device to all devices under the same iTunes account, so that I could make changes to my kids devices without physical access.

Please help!
It would be tremendously helpful to be able to access, set restrictions, and make changes from the parents device, to all devices under the same iTunes account, so that I could make changes to my kids devices without physical access.
I understand that I can set up a different Apple ID for the kids devices, or take physical control of the device and make the changes myself. However, my teenage son is technically savvy enough to have a job in Silicon Valley, as are most young people these days. However, in order to access his devices the current way, I first have to bypass the four digit pass code. This starts a fight of why I need in the device and continues to escalate. The argument that I am the parent will gain access but the fight is simply exhausting, and quite frankly shouldn't have to happen at all. He is not yet an adult, he did not pay for his iPad or iPhone and I, as a parent, should have not only have the right to change options at will, and from anywhere, but look at history or current activity when I feel like it.
I currently have the settings where app and in-app purchases require my password to be put in, and he must come to me to type it in, but I need more control and would like, and should be able to access any of our six devices and make individual changes simply by logging in to my account, with my password.
If I can see all my devices on the "Lost My iPhone" app, this technology should be easy to make happen.
C'mon parents! I have a pretty good kid, given all things that they can get into, but I am not stupid. For everything I see has been done, there is much more I haven't seen. I want my children to be kept safe and be able to know what they are looking at or listening to. We parents are the only ones who know our beliefs and what our kids can handle and when.
Thanks for any support or information that I may be missing in order to fulfill my request.

There are mobile device management solutions that can do this, including in Apple's OS X Server system, but most parents generally find that setting this up is more work than it's worth. If you're interested, though, there are a couple that at least purport to be free (I don't know if there are any hidden "gotchas"):
http://www.unwireddevicelink.com/features/
https://meraki.cisco.com/products/systems-manager
and Apple's system:
http://www.apple.com/osx/server/features/#profile-manager
I don't think any, however, allow you to see current activity or browser history. iOS doesn't expose those to access from MDM solutions, to the best of my knowledge.
Regards.

Possible to extract documents from Apple Configurator device backup file?

We updated several student iPads via Apple Configurator. All went well except for 2 devices that came out of the refresh process with all the student data wiped from the device. I am afraid to check the device in and check it out again for fear of losing the original backup made prior to the restore. I can see the device backup files but have no idea how to work with them. Is it possible for me to extract the documents and photos the students need?

Check this out:
https://talk.sonymobile.com/t5/Xperia-S-SL-acro-S/How-can-I-extract-contacts-from-dbk-file-on-my-com...
All we have to decide is what to do with the time that is given to us - J.R.R. Tolkien

Physical channel delete from labview

Hi ,,,i have one doubt,,consider i have Two Daqmx Channel Selection list controller for only one daq in Frontpanel,suppose i select AI0 for one measurement from one controller .then how to remove the AI1 in the Second Daqmx selection list controller in the fronpanel by using programaticcaly..
is anybody tell help to me

Hi
I have not had such a requirement before, as I had mostly used combo boxes, tables or trees for channel configuration settings.
In your case, I can suggest something as in the attached image.
Hope it meets your requirement. I would like to know if there is any other simpler or better method to achieve this.
Attachments:
Physical Channel.JPG ‏116 KB

Selecting physical channel from list with DAQmx

I'm trying to write a simple VI for reading and writing digital data. However, when I have a DAQmx physical channel control, the only options it presents to me are the various analog inputs (and doesn't allow me to type in the port I actually want to use). In other examples, e.g., "Write Dig Port.vi", the apparently identical control instead shows me digital port options rather than the analog in channels. As far as I can tell, there is no real difference between the controls as there is nothing in properties that I can really modify.
How can I get this control to let me choose the channels I want? Or is there some difference in these controls that I am not aware of?

The channel lists adapts to the type of DAQmx Create Channel that you use. Do you see the text below the DAQmx Create Channel? If your channel is displaying only analog input channels, then the DAQmx Create Channel type is AI Voltage. If you want to use digital input channels, change the type to Digital Input. Click on the little arrow on the right side. This is called a polymorphic VI selector. You can do the same thing by right clicking on the VI and do a Select Type.
Mark has a good point. If you change the type of DAQmx Create Channel and you already have a physical channel wired, you will have to go to I/O Name Filtering to change the channel types displayed. If you change the DAQmx Create Channel and then create a channel control by selecting Create Control, you'll get the correct type automatically.
Message Edited by Dennis Knutson on 03-11-2008 12:12 PM

Problem with DAQmx Physical Channel control

Dear LabVIEW community!
I have installed LabVIEW, v13.0f02, 32-bit on my PC. The problem, which I face, is that DAQmx Physical Channel controls, which are used in VIs inside the LV projects, sometimes don't show me the list of DAQ devices - I can't expand the list at all. I push the button to expand the list, but nothing helps.
But when I create VIs outside the project, and put there DAQmx Physical Channel control - everything works well.
Note: devices are simulated via MAX.
Is it some kind of bug in 2013 vesrion of LabVIEW? Because while using LV 2012 I didn't have such headache.
The only thing that helps now - is to restart PC (laptop) several times; b/c restart of LV doesn't help.
Can anyone suggest, what it can be, and how to fix this problem?
Thank you very much in advance!

Thank you for your answer!
The point is, that this bug is independent from the code. DAQmx Physical Channel controls don't work even when I'm trying to use NI examples - for instance, Strain - Continuous Input.vi; Voltage - Continuous Input.vi, etc.
I have such simulated via MAX devices: NI USB-9213, NI USB-9201, NI cDAQ-9172 with NI 9217, and 4 NI PXIe-4331 modules.
Also, what I have noticed - front panel doesn't visualized fully (I send you the screenshot). When I'm moving mouse pointer over it, those part, which were under the mouse pointer, became clearly seen. And when I minimize, and then restor FP, it becomes fully clear visible.
And also, this story happens when LV project is open. If I close opened projects, and open only single VIs, everything works smooth.
Thank you very much, I hope, that this information will be useful to solve this problem.
Attachments:
Screen 1.PNG ‏87 KB
Screen 2.PNG ‏107 KB
Screen 3.PNG ‏129 KB

How to get intimation about DAQmx Physical Channel invalid value encounter

Can anybody tell me that if a DAQmx Control gets value from a configuration file( .ini file ) and the value is invalid (does not exist in the available physical channels list) than how I can be programatically intimated. I couldn't find any property node of DAQmx Physical channel Control which tells about that the current value feeded to the control is invalid.

Thanks Alan, I have got a better soloution from you in another thread launched by me with title "How to get "Browse list of any DAQmx control in array form". In which u suggested of using DAQmx 8.0, which I have downloaded and used the property node DAQmx-Device>>DO.Lines to get an array of all Physical channels(DO category) of all devices. The value taken from that configuration file is searched in Physical channels array and if no match found than the value is invalid.

Filter the pull down menu of physical channels control

Hello all,
I need help, I'm desperate!
I'm trying to create a software recording data from an accelerometer by using a NI USB-9234 device. So in order to do that, I linked a physical channels control to DAQmx create channel. The thing is, I want to display in the pull down menu, only the physical channels attached to the NI device specified above. And besides, I'd like this to be done automaticaly, meaning that no matter what is the name of the device (dev1, dev2, dev3...), the pull down menu will display the four physical channels attached to the specified device.
Am I clear ?
I know that by right-clicking on the physical channels control, I can filter it but I can't manage to figure it out how to filter by specifiying a device. Maybe by using property nodes...I don't know.
If somebody has a solution, that would be much appreciated.
Thanks a lot

You can configure IO Name Filtering by choosing the following option in the context menu:
But you cannot select a certain device type there, but only certain device names (which is a huge difference).
So the easiest way to accomplish your task is to define a name for your USB-9234 (like MyDevice) and then limit the selection to "MyDevice".
You have to make sure, that each PC using the application as aware of "MyDevice". This setting is done in MAX (Measurement and Automation Explorer) and can be distributed with your application using the Application Builder (or manual export/import within MAX).
hope this helps,
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

DAQmx physical channel constant error

Hi all,
I am trying to get the labview 10.0 working in opensuse 11.4. I installed the components and all of them seem to be working fine.
The PCI card is also detected by labview. When I tpe lsdaq on the command line. I get the following output
Detecting National Instruments DAQ Devices
Found the following DAQ Devices:
NI 6025E: "Dev1" (PXI8::15::INSTR)
But when entering "Dev1/ai1" or "Dev1/ai0:3" in the DAQmx physical channel constant I get an error saying invalid channel name. How do I get rid of this error?
Chiran
Solved!
Go to Solution.

Hey Justin,
Thanks for your reply.
I am working with labview 10.0.
I installed DAQmx 8.0.2 but it did not help. DAQmx is not ideally meant for labview 10.0 and probably that is the reason why it does not work.
The installation also does not seem to go smoothly since it looks for support files from labview 8.6 and previous version which do not exist. I have attached the messages after installation of DAQmx.
Let me know if you find some way out.
Thanks,
Chiran
Attachments:
DAQ_inst.txt ‏5 KB

"Up Mix" from 2-channel "Stereo" audio content to 5.1/7.1 Surround

Hello,
This is a feature that I had strongly hoped would make it to Media Center in Windows 8, but didn't. Please consider this for a future update and/or the next version of Windows...
Feature Request: "Ability to Configure Stereo Up-Mix Capability in Windows Media Center and/or Windows Media Player from 2-channel Stereo to 5.1/7.1 Surround so Stereo MP3/WMA audio files output to *all* speakers in my system, not just the left and
right main speakers."
More information:
My audio content (MP3s, WMAs, etc.) are of course all 2-channel stereo format (left channel, right channel). My home theater PC outputs to my home theater receiver (which is a 2012-model Sony 5.1/7.1 receiver) via HDMI. When I play
2-channel music (MP3s, WMAs, etc.) from Windows Media Player (WMP) and Windows Media Center (WMC) both in Windows 7 and Windows 8, I only hear music from the left and right main speakers, *not* the subwoofer not the rear surround speakers.
In order for this to happen, WMP/WMC would need to "up mix" the stereo signal to take full advantage of my physical speaker configuration (as specified in my Windows' Playback Devices configuration, which Windows is able to discern from the capabilities of
my receiver). Media Center even has an Audio setup in which the end user configures the audio configuration to either Stereo, 5.1, or 7.1 yet music is still output over only two channels!
I would like to see WMC/WMP either "automagically" perform the "up mix" or provide the user with an option to enable/disable it when 2-channel Stereo audio content is played.
Too difficult? Rhapsody.com already accomplishes this with its online audio player! Note that my audio equipment has the capability of forcing output to two channels between the PC and the receiver, which my receiver will then up-mix, but this
requires physically maintaining a dip switch and also several button presses on my receiver's remote... and this physical configuration must be updated each and every time I switch between audio and movies. Too much work when it could be accomplished
automatically by WMP/WMC!
Thank you for your consideration of this feature request!
-Tretchie

The ability of windows to better control audio channel output is definitely an issue that needs to be fixed. It's really basic in this day and age where everyone and there mother has more than two speakers (i.e. 5.1 or 7.1). I understand that certain media
players, or certain decoders/channel mixers can be a workaround for this problem. But that's not enough. Today, we have many different sources for audio that are not just files on a computers:
1) Video/Movie files on computers (played through media center, MPC-HD or other)
2) MP3s/audio (played through same)
But there is also:
HTML5, webpages, Netflix, Amazon TV, Flash players, silverlight, etc. etc.
Hence why windows needs an option at the level of windows audio decoder to better control channel outputs over LPCM-HDMI! Either Mirroring L/R outputs to rear/side speakers, or, formal upmixing algorithms like Dolby Pro Logic etc., applied before
outputting over HDMI (Note I am NOT talking about bitstreaming!)
This is a trivial problem using WASAPI or ASIO. Why has windows audio not been properly updated since Windows XP!!
Recently, HTPCs and Media Centers are becoming many households primary source of entertainment.
Examples of some issues:
1) With no bitstreaming at all:
- Configuring HDMI audio "Playback device" to 5.1/7.1, and,
- Using a software decoder/media player to decode Dolby Digital, DTS, DTS-True HD, or Dolby True HD, and sending the data in LPCM over HDMI to the receiver/soundbar
-> works totally fine for outputting 5.1/7.1 surround from those sources
-> windows (i.e. software) completely fails in any ability to upmix 2.0 stereo sources to 5.1 or 7.1, or even mirror L/R channels to rear/side L/R channel for more room filling sound. Both these options should be available - upmixing with Dolby or other
for videos and mirroring/doubling the channels for music/MP3s.
Instead, windows audio sends silent channels over LPCM/HDMI when playing a stereo source. This has the added awful effect of not even letting my receiver upmix/mirror the outputs.
Hence, we need the ability to duplicate (for audio) and upmix (for videos) the L/R channels in a stereo source to the Rear L/R and or Side L/R channels through windows audio "playback devices" configuration before outputting over HDMI-LPCM!
In the day and age of 5.1 and 7.1 speakers this seems like such a BASIC feature that is missing.Otherwise, so many of us with an HTPC in our living room as our main source of media can't play music mirrored
through all our speakers, or watch videos with upmixed audio.
HDMI is the new standard, so this should really become an option.
I've done a fair amount of research on this problem, and do not believe there is any solution short of switching to optical (which I do not want to do because it can only carry 5.1) or, buying a fancy receiver instead of a soundbar with discrete rears and
a subwoofer (which I have) to do the mirroring/upmixing for me.

Physical channel constant and indexing

Hi people,
I need to associate an input channel to a certain output channel. Of course, that led me to the idea of a hash table and as Labview doesn;t have such a structure defined, I thought of using a case structure.
Now a bit of discussion about the Physical Channel constant- I am to add some of them there from which DAQ reads their values. You know the sintax ev1/ai0, Dev1/ai1...
Labview seems to index them according to the order they are introduced in the Physical channel, so one can manipulate them by extracting from the complex signal the array indexed 0, indexed 1, ...respectively.
My purpose in the end , though, is to associate Dev1/ai0, Dev1/ai1(and not the channel's index)... with some certain numbers into a somewhat hastable.
So the question is whether I can extract the string or symbol information of individual Dev1/ai0, Dev1/ai1,... out of their associated index or from somewhere else...
Can one of you envisage some solution?
Thanks a lot,
Dana

Hi Mike,
Thank you very much for the solution. Yes, this is the right way.
I'd come up with another complication.
What if the name of the channel is not available-can I first extract it from the index of the individual signal that I extracted from the complex one?
I made some comments in the picture , it's part of my actual application. Could I have your opinion on that? I placed an icon if the DAQmx channel propery - is this an answer to the question I posed? I cannot link some things in my reasoning, maybe you can help.
Kind regards,
Dana
Attachments:
channel name.JPG ‏153 KB

PCI 6281 board does not show up in Labview as having available physical channels

Hi, I have recently changed computers from a Windows XP machine to a Windows 7 machine. I am running Labview 8.6 (I realize LabView is not officially supported for Windows 7, but most features seem to work fine). I also have a PCI - 6281 M series DAQ board. Although the drivers seem to have installed properly for this card, Labview does not see any available physical channels. The board shows up in MAX under the PXI heading, and seems to have no conflicts with VISA addressing. I am not sure if the board should be there, as is there no PXI bus in this setup. I can't see the physical channels with any NI software including DAQ assistant in the main program, or Signals Express. Any advice would be appreciated.

DAQmx is version 8.7.2. Also, I installed the card prior to the drivers, I will try removing the card and replacing it. I seem to have isolated the problem - my old computer had the card showing up under the heading NI-DAQmx devices, where on the new computer it shows up under in the PXI heading in the measurement and automation explorer. I'm still not sure how to fix it though.

How to create multiple physical channels using DAQmx?

Hi, I am new to Labview.
Can anyone please help me on how to create multiple physical channels? I am following the LabVIEW examples in the NI example finder but they are only for acquiring signals from one channel.
Actually, I am using the channels of an SCXI 1520 to measure voltage signals. And one more thing, in the NI Example Finder, they are sample codes there for setting the filter in SCXI 114x.
Will this example work with an SCXI 1520, too?
Thanks!

There are many ways to read multiple channels in LabVIEW. First, if you look at that example that lets you set the filter setting on the 114x and you click on the 'Physical Channel Listbox' then click 'Browse' you can see that you can select multiple channels. After you select the channels and hit 'Ok' it will build a multiple channel string. This is one way to read multiple channels.
Next, you can create a 'Task' in Measurement and Automation Explorer(MAX). When you create this task select all the channels that you need to read then back in LabVIEW simply select a 'DAQmx Task Name Constant' Select the task you just created and wire that to an Input of your first DAQ VI. If you do this you do not need to have a 'DAQmx Create Physical Channel' VI or create
Task because it is already created in MAX.
When looking at example VIs you can tell if a multi-channel read is acceptable by looking at the 'DAQmx Read' and if it says NChan that means it will do a multichannel read. There are tons of example programs that will display the multichannel read capabilities.
This example may not work for the 1520 because the properties that are set could possibly be specific to the 142x. When using the 1520 though it is very likely that the properties will be very similar if not exact. You will simply put a DAQmx Channel property node on your block diagram and then look for the Lowpass filter settings properties that will most likely be in the same location. Now another way todo this without using a property node would be in MAX when you create a task set the filter settings from the Device tab in the task configure window.
Let me know if you need anymore help with reguards to this issue! Have a great day!
Allan S.
National Instrument
s
Applications Engineering

Extract device from physical channel

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