Howto copy files from a device to a PC using serial communication.

Hi,

I am copying some files from my linux PC to a handset having linux
installed. This I am doing using minicom. I also get a shell prompt on
the handset via minicom terminal and can browse the directories on the
handset. Is it possible to copy files from the handset to the PC. What
are the prerequisite for any system to support uploading the files via
serial port? I am able to run the sz command on the handset but I get
the error "Got ZCAN". Any way in which I can copy files from the
handset to my PC using serial communication.

Thanks and cheers,

~Ajit

 

Check these:
http://www.tldp.org/HOWTO/Serial-Laplink-HOWTO/index.html
http://www.tldp.org/HOWTO/Serial-HOWTO.html

x86

Gentoo Linux 1.4 (2.6.5-mm1) / FreeBSD Unix 4.9 - Pentium M 1.40GHz -
512 MB - 40 GB - 14" - 4.5-4.9 lbs - CD-RW/DVD-ROM - Intel
PRO/1000 Gigabit Ethernet - Intel PRO/Wireless Network Connection
802.11b

 

You either have to run rz on the receiving end before starting sz on
sending end, or use a terminal client that can automatically receive
zmodem files (I hear kermit mentioned, but have never used it).

 

Seyon supports error-checking protocols.


--Rod

__________

Author of "Linux for Non-Geeks--Clear-eyed Answers for Practical Consumers"
and "Boring Stories from Uncle Rod." Both are available at
http://www.rodwriterpublishing.com/index.html

To reply by e-mail, take the extra "o" out of the name.

 

That can't be done in that order. You must start sz at the
distant end, and then start rz on the local side.

The minicom program he is using includes the zmodem protocol for
both send and receive.

It's been a _long_ time since I've done any file transfers using
that method, and I have no idea what "Got ZCAN" means, and the
man page for sz doesn't give a clue. I guess a search through
the sources would be the way to find out...

However, I do recall having all sorts of problems that varied
from one host to another, with one program or another, and it
always basically amounted to just trying different things until
something worked. The first thing to start with is the use of
xmodem-1k or ymodem rather than zmodem. With any of them, if a
transfer can get started, and get at least a few packets sent,
even if it then hangs at some point the significance is that the
send end and the receive end can probably work together (and
fooling with various other options will eventually lead to
success).

Frankly, I'd rather set up PPP, if possible.

 

Sigh...! -

Anyways, Floyd, welcome back to daylight...! <grin>


Cheers, Jack.

 

Are you kidding? It hasn't gotten dark enough to see stars here
for quite awhile, and then you had to be up at 2 AM to see them.
As of April 24th it is never getting darker than civil twilight.

Like everywhere else, at the equinox we get 12 hours of day
and 12 hours of night. So way back last March 19th, we were
getting 12 hours of sunlight.

If you're thinking in terms of when the sun came up after being
down all winter, that happened back on January 24th.

The next major event here comes in just a couple weeks, on April
10, when the sun rises at 1:43 AM... because it won't be going
back down until August 1st!

That's a long day, for a night person...

 

Don't take that personally, Floyd, but I love it when from time to time
You describe the situation You're in...

I never said that before...: Over here, we measure daylight in hours
rather than months, but that's only because we're too lazy to look up
the calendar... - Which obviously goes for You, as well: Over here,
April 10 is just over a fortnight ago... But I never got the point with
Gegorian calendars and stuff anyways.

How about illuminated advertising over at Your's? - They're all broke by
now, aren't they?

OK, keep Your eyes shut, speak by Aug 2nd...

[Again, _I_LOVE_IT_; when in OZ, they'd say "G'Day", but they said that
every 24 hrs rather than every 365 days...]


Sorry and Giddy, Jack.

 

(Ajit Kamat) writes:

]Hi,

]I am copying some files from my linux PC to a handset having linux
]installed. This I am doing using minicom. I also get a shell prompt on
]the handset via minicom terminal and can browse the directories on the
]handset. Is it possible to copy files from the handset to the PC. What
]are the prerequisite for any system to support uploading the files via
]serial port? I am able to run the sz command on the handset but I get
]the error "Got ZCAN". Any way in which I can copy files from the
]handset to my PC using serial communication.

]Thanks and cheers,

The best way would probably be to run ppp on the link. Use a null modem
cable, and directly plug the serial ports together. Start up ppp on one
of them with the passive option, which will wait for the other. they
start up ppp on the other without the passive option and with
10.0.0.1:10.0.0.2
If you have full speed ports, use 11520 on each as the speed, and
/dev/ttyS0 (I assume) as the device. If you have a full cable, use
crtscts as well on both.

Then you have a standard tcp connection which you can send whatever you
want.

 

Typo alert: some dummy said April 10th, when obviously in two weeks
it is going to be May 10th. Sorry about that.

Well shucksh man, we do too. Days just are not necessarily
delimited by when the sun is or isn't here, that's all!