Hi Romain,
the port changes while SerialForwarder is running. It takes a few hours to
change port generally, i'll have a look at dmesg when the port changes
again.
SerialForwarder may cut out again, but shouldn't fail completely after
adding the following file to /etc/udev:
#tinyos rules
ENV{ID_SERIAL_SHORT}=="M4AP419H", SYMLINK+="BaseMote"
and pointing SerialForwarder to BaseMote:
java net.tinyos.sf.SerialForwarder -comm serial@/dev/BaseMote:telosb
Thanks for the help,
Colum
On Thu, Jun 16, 2011 at 12:31 PM, Romain Bornet <[email protected]>wrote:
> Hi,
>
> I don't think that your problem is related to your packet size but
> most probably to linux drivers.
>
> >> I have one mote acting as a BaseStation, which randomly changes port
> (/dev/ttyUSB0->/dev/ttyUSB1)
> Do you mean that the port changes at runtime or between 2 executions
> of SerialForwarder ?
>
> If the port changes at runtime, I would assume that the USB link gets
> shortly broken and up again and thus the driver mounts the USB-serial
> converter on another ttyUSB.
>
> There are ways to configure Linux/udev to always mount the same
> hardware on the same ttyUSB port. I only have a link to a french blog
> entry I could remember.
>
> http://www.lefinnois.net/wp/index.php/2009/04/15/ttyusb0-ttyusb2-non-ttyusb1-graaaahh-udev/
>
> Basically, you can force udev to mount a device to a fix port based on
> its serial number.
>
> You can retrieve the serial number of your USB converter with:
> $udevadm info -a -p $(udevadm info -q path -n /dev/ttyUSB0)
>
> and then update your /etc/udev/rules.d accordingly.
>
> This is only part of the solution (will always mount the serial link
> on the same ttyUSB port) but it does not explain why the device gets
> disconnected and connected again... Have a look at the output of dmesg
> to see if your Linux host really detects disconnects...
>
> In case of disconnection you should see something like:
> [191876.912510] ftdi_sio 2-1.4.1:1.0: device disconnected
>
> and later again a connection
>
> [191886.215902] usb 2-1.4.1: new full speed USB device using ehci_hcd
> and address 10
> [191886.331193] usb 2-1.4.1: configuration #1 chosen from 1 choice
> [191886.333078] ftdi_sio 2-1.4.1:1.0: FTDI USB Serial Device converter
> detected
> ...
> [191886.333747] usb 2-1.4.1: FTDI USB Serial Device converter now
> attached to ttyUSB0
>
> Hope this helps,
>
> Romain
>
> On Thu, Jun 16, 2011 at 12:27 PM, colum walsh <[email protected]>
> wrote:
> > Hi list,
> >
> > I have one mote acting as a BaseStation, which randomly changes port
> > (/dev/ttyUSB0->/dev/ttyUSB1), causing SerialForwarder to stop working.
> Has
> > anyone else had this issue?
> >
> > My packet size is larger than standard, could that be the cause? Or
> > something to do with linux drivers?
> >
> > I'm using tmote sky motes, tinyos-2.1.1, and Ubuntu Lucid.
> >
> >
> > Thanks for your time,
> > Colum
> >
> > _______________________________________________
> > Tinyos-help mailing list
> > [email protected]
> > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
> >
>
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