pfroud / jvisa Goto Github PK

Hello,
I tried to use JVisa to connect to a device, when I use

jVisaInstrument.sendAndReceiveString("*IDN?\\n");

something is wrong, the trace is:

/project_code/jj/jvisa/target/classes:/root/.m2/repository/net/java/dev/jna/jna/5.11.0/jna-5.11.0.jar:/data/app/idea-IU-211.6693.111/lib/idea_rt.jar xyz.froud.jvisa_example.lowlevel.FindResourcesExample
Connected to the target VM, address: '127.0.0.1:38753', transport: 'socket'
Exception in thread "main" xyz.froud.jvisa.JVisaException: in viRead(): Timeout expired before operation completed. (0xBFFF0015)
	at xyz.froud.jvisa.JVisaResourceManager.checkError(JVisaResourceManager.java:291)
	at xyz.froud.jvisa.JVisaInstrument.readBytes(JVisaInstrument.java:152)
	at xyz.froud.jvisa.JVisaInstrument.readString(JVisaInstrument.java:168)
	at xyz.froud.jvisa.JVisaInstrument.sendAndReceiveString(JVisaInstrument.java:74)
	at xyz.froud.jvisa_example.lowlevel.FindResourcesExample.main(FindResourcesExample.java:37)
Disconnected from the target VM, address: '127.0.0.1:38753', transport: 'socket'

Thanks for sharing this fantastic library!!! I am trying out the SimpleExample you have here but I get run-time errors (see below). I am using this on MacOSX but I did not do any changes to the code (it seems to point to a VISA .dll). Any help is appreciated! Thank you again!
Details: MacOS Catalina version 10.15.7
The computer has LabVIEW 2021 installed and I can control instruments just fine with VISA from within LabVIEW.

At present, I use resourceManager.openInstrument("TCPIP0::192.168.1.11::1799::SOCKET"); to implement. In fact, I want to get resources from another IP first.

I am using Centos7.X and NI-VISA.

Can you add a constructor like resourceManager.findResources("xxx.xxx.xxx.xxx"); to implement it?

Hi, how are you?

I need to develop an Android app capable of communicate with an oscilloscope which support SCPI commands (I have it currently working in a Windows environment with Py VISA).

I see the supported OSs in the description, but I wonder if this library would work in an Android OS. In case it doesn't, or it is uncertain, would you help me giving me a hint of what kind of solution would be a better approach? If mixing Java with C (which I understand work well with VISA) or better go with C# (having .NET working with NI-VISA) and Xamarin (for Android, because C# is not officially supported by Android, when Java and/or Kotlin yes).

(If you need context and my question is not out of place in the first place, I'm aiming to develop an app for Android which retrieves data from an Owon VDS6102 oscilloscope and show it in charts and graphs.)

Thank you in advance.

I'm looking to use this on M1 mac. I have NI-VISA installed but I get the following trace.

Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'visa':

Thanks

PyVisa uses query_binary_values method to parse blocks of binary data，does JVisa support parsing binary block data?

Hello,

Thank you for your efforts in sharing this library. I am trying to use visa on linux. Have you ever tested whether this library works well on Linux? Does this library work on Linux?

hi,The return value of the instrument query error command is "+0, No error", I see that the source code does not filter this situation.

JVisa whether you can read and write 16-base data?
can you give an example?

hi,The return value of the instrument query error command is "+0, No error", I see that the source code does not filter this situation.

This is not a bug report, but I was wondering why the visibility of the readBytes(int bufferSize) method on JVisaInstrument is protected. Is there any reason for this?

Other methods for reading responses (readString(), readString(int bufferSize)) are public.
Therefore, I feel that we may as well make it public in the same way.

Please consider this if you would like.

Hello,

Thank you for this library, I just want to ask if it is stable using Keysight visa as I'm integrating with Keysight product, I've read that it is not the recommended way, but I'm asking if it worked with Keysight visa does this mean it is stable?

Hello, does the JVisa library support the communication of converting the serial port address to ASRL?::INSTR?