Can't see eDVS in USB interface list - librxtx problem?

Question

Can't see eDVS in USB interface list - librxtx problem?

Closed this issue 7 years ago · 13 comments

Hi,
my eDVS camera which I've connected via USB doesn't show up in the eDVS hardware Interface chooser. When I hit refresh, the following is logged to the console:

java.lang.NoClassDefFoundError: com/sun/jna/platform/win32/Win32Exception thrown while loading gnu.io.RXTXCommDriver

System details:
java version "1.8.0_131" (64 bit)
Ubuntu 16.04 LTS

Compiled jAER 1.5 and set up the udev rule as recommended in the docs. Setting chmod 0666 on /dev/ttyUSB0 didn't help. Tried it with eclipse as well - no luck.

I installed librxtx and added the .so files to the classpath in the startup script - no change.

Any ideas?

Best regards,
Michael

Answer 1 · 2017-07-06T13:36:28.000Z

Hi,

have you tried to manually connect to the edvs as described here?

https://inilabs.com/support/hardware/edvs/ see section "Accessing the device manually"

Can you actually see the device if you use a terminal connection?

Answer 2 · 2017-07-06T14:26:35.000Z

Hi Frederico!

I had to sudo minicom although the permissions of /dev/ttyUSB0 are 0666. Does this mean there might be an issue with the udev rules?

Once minicom was running I tried entering ?? to see the help screen but to no avail. Does this mean I don't see the board?

I had to set the baud rate to 12000000 via a config file, because minicom itself would only let me choose 4500000 at max.

Answer 3 · 2017-07-07T02:15:36.000Z

Hi Michael, did you by any chance try a windows machine? That seems to work more predictably with serial port for some users. Did you have a look at past posts? I know there was another thread about this recently. Best, Tobi

Answer 4 · 2017-07-07T09:36:38.000Z

Hi Tobi,

it works under windows.

I had a look around the old forum. One thread suggested that using the latest git/svn snapshot under eclipse solved a somewhat related problem - will try this next and update the thread.

Answer 5 · 2017-07-07T09:55:46.000Z

Hi Michael,

Please also that now the edvs is now supported in libcaer and caer. These are c/c++ based softwares that can be used in linux and that targets embedded systems.

Both these softwares are open source and available here: https://github.com/inilabs/

Note that you will need to download them from the github and compile them from source. They require libserialport >= 1.1.1 to work with the eDVS.

Answer 6 · 2017-07-07T10:01:54.000Z

Thanks Frederico, I'll give caer a try!

Answer 7 · 2017-07-12T17:06:28.000Z

I managed to get caer working on ubuntu 16.04 and I can see the eDVS output in all its glory! ;)
Still no idea why jAER fails on me though - any ideas how I could start to debug the serial port issue in Java?

Answer 8 · 2017-07-12T18:54:18.000Z

Hi Michael. We're going to try to get caer to work on Ubuntu 16.04 too in September. Was there any particular trick? Any libraries or undocumented packages that need to be installed? Ciao, g.

…

On July 12, 2017 19:06:41 Michael Schmuker ***@***.***> wrote: I managed to get caer working on ubuntu 16.04 and I can see the eDVS output in all its glory! ;) Still no idea why jAER fails on me though - any ideas how I could start to debug the serial port issue in Java? -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: #2 (comment)

Answer 9 · 2017-07-14T10:02:29.000Z

Hi Giacomo!

I built a fairly minimal version of caerlib/caer, only with the visualiser and eDVS modules. The only hoop I had to jump through was that I had to install libserialport from source, as there is no .deb for 16.04 xenial with the required version.
I should say the caer/libcaer cmake process seemed very well organised and made it a breeze resolving all dependencies. 👍

Answer 10 · 2017-07-14T10:18:09.000Z

Hi Michael,

thanks for the feedback.
@giacomoi : note that libserialport is only needed for the eDVS module.

best,
Federico

Answer 11 · 2017-07-24T08:54:30.000Z

Hi Everyone

I ran into this problem at the Telluride workshop, where I couldn't get the com port of the eDVS to show up in the Interface Chooser in jAER. This was the case on both Linux (Arch) as well as Windows. Eventually I decided to try rolling back to an earlier commit of jAER (on from the end of May) and this worked.

So some change in the jAER code base is the issue. git bisect should point you to the problematic changes that were made.

Answer 12 · 2017-07-24T09:04:46.000Z

Hi Greg,
thanks for the hint, this probably means this is not just a problem on the ubuntu side.
Do you by any chance remember the exact commit that still worked for you?

Answer 13 · 2017-08-03T15:20:43.000Z

I have now reverted the nrjavaserial library to version 3.12.0. There seem to be issues on some systems with 3.13.0 (latest release). This should bring back at the least the status as it was in May 2017.