Chris Rhodin wrote:
> I figured it out. It was user error. When I diff'd the output of "stty"
> from my laptop and server I saw the server had "-crtscts" and laptop had
> "crtscts". It turns out minicom enables hardware flow control by default
> and I had changed that default on my laptop somew
On Tue, 07 Apr 2020 08:24:50 -0500
"Martin McCormick" wrote:
> deloptes writes:
> > Chris Rhodin wrote:
> >
> > > Tonight I'll look at the serial port ioctls and see if I can spot
> > > a difference there. I also try enabling flow control and
> > > fiddling with
> > the
> > > signals to
deloptes writes:
> Chris Rhodin wrote:
>
> > Tonight I'll look at the serial port ioctls and see if I can spot a
> > difference there. I also try enabling flow control and fiddling with
> the
> > signals to see if that unstops it.
>
> Are you sure that this is enabled in the BIOS, also some se
On Mon, 6 Apr 2020 22:53:25 -0700
Chris Rhodin wrote:
>
> Q: Is "stty" the right command line tool to check all of a serial
> ports settings?
>
It Works For Me.
I had a very simple serial requirement recently, and this did the job.
Oh, as to 9600 Baud, if you plug a USB serial port into stre
On Mon, Apr 06, 2020 at 11:59:14PM -0700, Chris Rhodin wrote:
> I figured it out. It was user error. When I diff'd the output of "stty"
> from my laptop and server I saw the server had "-crtscts" and laptop had
> "crtscts" [...]
Ah... I see.
Thanks for posting the resolution, much appreciated :
e it work.
>
> Chris
>
>
> On Mon, Apr 6, 2020 at 10:53 PM Chris Rhodin wrote:
>
>>
>>
>> -- Forwarded message -----
>> From: Chris Rhodin
>> Date: Mon, Apr 6, 2020 at 7:28 PM
>> Subject: Re: Serial Port Issues
>> To:
>>
> From: Chris Rhodin
> Date: Mon, Apr 6, 2020 at 7:28 PM
> Subject: Re: Serial Port Issues
> To:
>
>
> I have two devices I'm trying to connect to, a UPS and a network switch.
> By default the UPS runs at 2400 baud and the switch runs at 9600 baud.
> Befor
Chris Rhodin wrote:
> Tonight I'll look at the serial port ioctls and see if I can spot a
> difference there. I also try enabling flow control and fiddling with the
> signals to see if that unstops it.
Are you sure that this is enabled in the BIOS, also some serial ports like
HP have special con
-- Forwarded message -
From: Chris Rhodin
Date: Mon, Apr 6, 2020 at 7:28 PM
Subject: Re: Serial Port Issues
To:
I have two devices I'm trying to connect to, a UPS and a network switch.
By default the UPS runs at 2400 baud and the switch runs at 9600 baud.
Before connecting
On Mon, Apr 06, 2020 at 09:51:15AM -0400, rhkra...@gmail.com wrote:
> On Monday, April 06, 2020 03:50:59 AM to...@tuxteam.de wrote:
> > Besides, a wrong baud rate would much less explain that writing is
> > possible, but reading isn't. Not for classical "serials" (i.e. RS-232).
>
> From the OP: "
On Monday, April 06, 2020 03:50:59 AM to...@tuxteam.de wrote:
> Besides, a wrong baud rate would much less explain that writing is
> possible, but reading isn't. Not for classical "serials" (i.e. RS-232).
From the OP: " On this system a serial port can only receive data and not
transmit."
Wouldn
On Mon, 6 Apr 2020 08:32:53 -0400
Greg Wooledge wrote:
> On Mon, Apr 06, 2020 at 08:38:58AM +0100, Joe wrote:
> > I doubt it's that. 9600 is a sort of default these days [...]
>
> ... 25 years ago.
>
You'd be surprised how much serial stuff there is around. A lot of it
is based around low-po
On Mon, Apr 06, 2020 at 08:38:58AM +0100, Joe wrote:
> I doubt it's that. 9600 is a sort of default these days [...]
... 25 years ago.
to...@tuxteam.de wrote:
> What has agetty to do with not being able to access a port?
>
>> I doubt it's that. 9600 is a sort of default these days, and a serial
>> port which could not use it would be of limited use. The XBee radio
>> modules, for example, come from the factory running at 9600, t
On Mon, Apr 06, 2020 at 08:38:58AM +0100, Joe wrote:
> On Mon, 06 Apr 2020 08:53:05 +0200
> deloptes wrote:
>
> > Chris Rhodin wrote:
> >
> > > I checked the permissions and group memberships but they're already
> > > correct. I also tried executing at root privilege, no luck.
> >
> > 'R you
On Mon, 06 Apr 2020 08:53:05 +0200
deloptes wrote:
> Chris Rhodin wrote:
>
> > I checked the permissions and group memberships but they're already
> > correct. I also tried executing at root privilege, no luck.
>
> 'R you sure about the baud rate (9600)? It might be something higher
> ... al
Chris Rhodin wrote:
> I checked the permissions and group memberships but they're already
> correct. I also tried executing at root privilege, no luck.
'R you sure about the baud rate (9600)? It might be something higher ...
also did you setup agetty accordingly?
to...@tuxteam.de wrote:
> Permissions? (they would have to be a bit funny, write but not read,
> but hey, it'd be possible).
I checked the permissions and group memberships but they're already
correct. I also tried executing at root privilege, no luck.
Chris
On 4/5/2020 3:06 PM, Chris Rhodin wrote:
> Hi All,
>
> I have a rack mount server running a fresh install of Debian buster. On
> this system a serial port can only receive data and not transmit. This is
> true for both the built in serial port and USB to serial adapters. I'm
> testing this with
to...@tuxteam.de wrote:
> Permissions? (they would have to be a bit funny, write but not read,
> but hey, it'd be possible).
definitely, because it is usually read only for the group by default.
$ ls -al /dev/ttyS1
crw-rw 1 root dialout 4, 65 Apr 5 11:40 /dev/ttyS1
wrote:
...
> Permissions? (they would have to be a bit funny, write but not read,
> but hey, it'd be possible).
that was my first thought too...
songbird
On Sun, Apr 05, 2020 at 06:06:43AM -0700, Chris Rhodin wrote:
> Hi All,
>
> I have a rack mount server running a fresh install of Debian buster. On
> this system a serial port can only receive data and not transmit. This is
> true for both the built in serial port and USB to serial adapters. I'
Hi All,
I have a rack mount server running a fresh install of Debian buster. On
this system a serial port can only receive data and not transmit. This is
true for both the built in serial port and USB to serial adapters. I'm
testing this with a loop back cable and the command "minicom
--baudrat
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