Read and write to an USB device without any products from NI

Hi!
Is there any possibility to read an USB device and write to it without any NI products?
I want to measure temperature with several sensors from Dallas (DS18S20).
I'm using Labview 8.2.
Thanks for your help.

Hey, I have never used Dallas sensors but I just used Google and found this which might help you.
Also here you can find some basics of using USB in LabVIEW. But USB communication is always a bit tricky. Have fun
LV 2011, Win7

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I'm using a Logitech Webcam Pro 9000 (which has a microphone on the side). I have several other devices plugged into separate USB slots: a keyboard, a mouse, my iPhone, and a Roland keyboard midi controller.
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Maybe I should try to use line-in and forgo USB altogether then. I think I'd need a preamp and some sort of converter for that since the Mac Mini lacks a powered mic jack. I'm only a newbie musician so I've never set up such a system but it might be a better solution in the long run.
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Hi Ralphael,
I was thinking of buying the WD MyCloud box and your words of wisedom inspired me to take a risk, getting one of these for myself. It's always a gamble buying new technology bits and hoping it will do, what you expect it to do.
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I have an Iphone 5S and used to sync it to my computer in the past without any problem, but now I can't, and appears the message "usb device not recognized", and the cable is good and so the USB port. Do you have any idea what's the problem?

Try leaving it plugged in and then restart the computer.
If you are on Windows this link may help but it is a bit old.
http://www.technologynext.org/error-usb-device-not-recognized-how-to-fix/

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Hi,
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Hi,
Everything is Windows 2012 R2.
SCOM does not gather any data for the following performance counters:
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Hyper-V Virtual Storage Device - Read Operations/Sec
Hyper-V Management Pack Extensions 2012 / 2012 R2 are imported.
If I add the counters in PerfMon, it works.
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Thanks!

To monitor Hyper-V Virtual Storage Device - Read and Write Operations/Sec, you can refer below link
http://www.aidanfinn.com/?p=15386
Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question, please click "Mark As Answer"

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You will most likely need to rework your fstab. The one from my desktop is shown below. If you want regular users to be able to access the partition, then you will need to change the gid option as I have done. Although you could create a group just for people you want to have access.
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none /dev/pts devpts defaults 0 0
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/dev/cdrom /media/cdrom auto ro,user,noauto,unhide 0 0
/dev/dvd /media/dvd auto ro,user,noauto,unhide 0 0
/dev/mapper/nvidia_fbgfhehd1 /boot ext2 defaults 0 1
/dev/mapper/nvidia_fbgfhehd2 / reiserfs defaults 0 1
/dev/mapper/nvidia_fbgfhehd3 /var reiserfs defaults 0 1
/dev/mapper/nvidia_fbgfhehd5 /opt reiserfs defaults 0 1
/dev/mapper/nvidia_fbgfhehd6 swap swap defaults 0 0
/dev/mapper/nvidia_fbgfhehd7 /home reiserfs defaults 0 1
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Libusb requires write access to USB device nodes [SOLVED]

Hi,
I have used gtkam to upload photos from my camera for some time now - though on an occasional basis because I don't take very many photographs. On attempting to use it today for the first time in a while I find that I can't do so as a user.
"libusb couldn't open USB device /dev/bus/usb/003/002: Permission denied.
libusb requires write access to USB device nodes."
Can anyone tell me how to fix this please?
Last edited by perseus (2011-01-03 22:46:46)

I did some additional research and found the udev file for libgphoto2: /lib/udev/rules.d/40-gphoto.rules
I also realized that my camera is not listed in that file:
Bus 001 Device 011: ID 04a9:31f6 Canon, Inc.
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Unfortunately this didn't work out.
I also tried to add the following line to that gphoto udev file as suggested by Digital Cameras wiki
PROGRAM="/lib/udev/check-ptp-camera", MODE="0660", GROUP="camera"
Still nothing after restarting udev...
My next try was adding the camera to the HAL fdi file /usr/share/hal/fdi/information/20thirdparty/10-camera-libgphoto2.fdi and restarting HAL.
This didn't help either.
I'm getting short on clues...
For sure I can access the camera as root but that's not what I want to do.
!! UPDATE !!
I was dumb. PTP cameras are handled separately so I don't need to have the USB IDs in the udev or fdi files.
So the question is why PTP cameras are not handled correctly, why the group for these devices is not "camera"?
Last edited by KoS (2011-01-03 22:19:57)

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I know how to retrieve list of USB devices (with storage via PowerShell) that connected to my Notebook.
Am not sure how to retrieve a list of connected USB devices (without storage) such as wireless mouse, keyboard etc. I need their information such as brand, model and serial number.
Regards
Tiong

Start with this:
gwmi win32_pnpentity |?{$_.deviceid -match 'usb'}|select name
¯\_(ツ)_/¯

Can I save to memory sticks for read and write access?

I use M.S. Office for Mac to do my admin. I would be very grateful if anyone can help with my queries.
I want to save work to media that allows me read and write access. Saving to discs (of any type) does not allow any editing.
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Also;
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5. I have heard that passwords can be created by Mac; what is the method for doing this please?
Many thanks for in advance.

There is terminology here I am unfamiliar with. I feel I have embarked upon a complex path.
I do not know what HFS+ is.
HFS+ is the Mac OS X file system. Hierarchical File System Plus (Plus as it used to be HFS, but then they improved it and said +)
By default a USB flash drive generally comes formatted with FAT (from the Microsoft MS-DOS days, but is a universal format - it might come with FAT32 or exFAT as well - still from Microsoft). Mac OS X can read/write these, HOWEVER, its FileVault whole disk encryption is only designed to work with HFS+, which is why I mentioned it.
Applications -> Utilities -> Disk Utility can be used to reformat a disk, USB Flash drive, etc... NOTE: reformatting does erase everything on a disk, so keep that in mind.
What is the difference between File Vault and .dmg in disk utilities?
FileVault is whole disk encryption. Everything on the disk is encrypted. and you need to enter the password just to mount the device.
A .dmg file is a regular file that happens to contain a file system inside of it. When you double click on the .dmg file, Mac OS X will mount the file system inside as if it was a disk. If the .dmg file is encrypted, then you will be prompted for the password before Mac OS X will mount it. A .dmg is just a container for a file system. Inside that contain is a full file system with files and directories just like any other file system.
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If the device you put it can be mounted by Mac OS X, then you can double-click on the .dmg and it will mount the file system inside the .dmg and you will be able to access the files in the .dmg
This even includes USB Flash drives that use the FAT format family. But you existing external disks can be used for that as well.
If I used an external hard drive for the purpose I have in mind, would the disk .dmg utility allow me to access folders and files for editing or should I approach the task in a different way? I would still wish to encrypt.
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I have read many threads on related topics but none directly apply to this situation. I have created a library containing a Modbus I/O server and shared variables bound to read and write holding registers. I have followed all recommended tips for creating such variables but I can neither read or write data. All data types are U16 due to Modbus protocol limitations. I have also applied the LV x10 factor in the most significant digit in the register offset (6 digits instead of 5).
I have a cFP-1804 on the same network which reads into the datalogger OK. The registers I use are 31000 (for CH0 on module 0, 31002 for CH1, etc) and the data can be read as FLOAT32. I have updated the firmwate on the 1804 to the latest level. I cannot even get shared variables to read SGL values. Using registers 301001 for CH0 and 301002 for CH1 I can only read U16 values, and not a 2-word SGL.
Third party Modbus simulation software is able to write to and read from registers very easily, but not LabVIEW.
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- is there some other wierd translation in register offsets between LabVIEW and traditional Modbus?
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Sending the whole 60-character string using a string or array would be the most efficient. I have tried both methods, and these only cause the datalogger to flag a message log but no text is displayed.
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Can anyone confirm whether this method should work in 8.2?
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Hello All,
I am a new one here,
I am sorry for any mistakes and also my english is so poor.
M Brother company runing Windows 2008 R2 as Active Directory...
We have folder Name: Admin
and in this folder, there are alot documents files as : *.doc, *.dwg, *.txt etc.....
All user accesing to these files and they can open to edit and save...
One day my brother want me to set Admin folder for all users just"Read and Write.." mean they still can open files to edit and save... but can't delete..
I did success with this..
But only one thing happen.. when they open *.doc file to edit and attempting to save, the message alert" access denide " and they can only "SAVE AS"...We don't want "Save as"
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Could expert here ever face this issues and fix by yourself, please share me with this..
Please help me..
Best regards,

Hi,
Office programs are specific. They will create a temp file when edit, then the temp file will be deleted when close. So Delete permission is needed for users to saving Office files like Excel/Word.
For more detaile information, please refer to the thread below:
Special Permissions - User cannot save files
http://social.technet.microsoft.com/Forums/windowsserver/en-US/721fb2f1-205b-46e5-a3dc-3029e5df9b5b/special-permissions-user-cannot-save-files
Best Regards,
Mandy
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Read and Write data in iphone app

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Do a search for 'HTML 5 Storage' and you'll find a bunch of resources that will help. Here's a few
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http://diveintohtml5.info/storage.html
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Read and write to an USB device without any products from NI

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