[Voyage-linux] FTDI USB Serial Device converter disconnected

[Rainer Stratmann]

Am Monday 05 September 2011 16:42:15 schrieb themrorange at gmail.com:
> Thanks a million for the advise.
> I'm a bit more interesting debugging the problem and understanding what is
> the cause of the disconnection. Indeed, the USB device disconnects from
> ttySB0 and reconnects automatically to ttyUSB1. The problem is that during
> the time when the device disconnects and reconnects I lose precious data so
> I'm trying to avoid disconnections. Any other idea?
Even if everything is ok it MAY BE some times that the device will disconnect 
(for what reason ever). And then it would be good also to have a automatic 
reconnect in your software. I have it.
What USB serial device do you have?
Best regards, Rainer
> Thanks
> Davide
>
> On 5 Sep 2011, at 15:17, Rainer Stratmann wrote:
> > You can close ttyUSB0 and open ttyUSB1 if you detect a disconnect.
> > You can detect on which usb port a FTDI Chip is connected.
> >
> > /sys/bus/usb/drivers/x-x:x.x/ttyUSBx
> >
> > x is various.
> >
> > Am Monday 05 September 2011 16:06:00 schrieb themrorange at gmail.com:
> >> Hi,
> >>
> >> I'm using Alix 2D3 and Voyage 0.7.5, and I'm facing a nasty problem with
> >> the USB. I have a device connected by USB and I have to read information
> >> from that device continuously for few months. For some reason, after a
> >> while, the USB disconnects!!! Happened many times already and always
> >> after a random period of time (few hours or few days).
> >>
> >> Has anybody of you had similar problem?
> >>
> >> As you can see below, from my dmesg output, the USB went off after more
> >> than 2 days of activity!
> >>
> >> [   62.583495] device tun0 entered promiscuous mode
> >> [181469.402683] hub 1-0:1.0: port 1 disabled by hub (EMI?),
> >> re-enabling... [181469.403667] usb 1-1: USB disconnect, address 2
> >> [181469.406021] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now
> >> disconnected from ttyUSB0
> >> [181469.406654] ftdi_sio 1-1:1.0: device disconnected
> >> [181469.627963] usb 1-1: new full speed USB device using ohci_hcd and
> >> address 3 [181469.777676] usb 1-1: configuration #1 chosen from 1 choice
> >> [181469.783296] ftdi_sio 1-1:1.0: FTDI USB Serial Device converter
> >> detected [181469.784171] usb 1-1: Detected FT232BM
> >> [181469.785634] usb 1-1: FTDI USB Serial Device converter now attached
> >> to ttyUSB1
> >>
> >> I google it a bit but I have not found solution yet
> >>
> >> Any comment is more than welcome
> >>
> >> Many thanks
> >> Davide
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> >
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