Hi, I'm writing an application that uses a serial port. I am using some kind of driver, but I'm not getting the expected results. So I would like to see what is written to and comming from the serial port. Since I use Ethereal to transparently snif the network, so I wonder if there exists something like it for the serial port. I googled and the only thing I thought usable was 'cat /dev/ttySx > data.dat &' but when I tried this the filesize was only one byte although there were sent and received many more. Is this usable for binary information ? For receive AND transmit ? Any suggestions are welcome ! Thanks. -- Met vriendelijke groeten, Koenraad Lelong R&D Manager ACE electronics n.v.
On 6/8/05, Koenraad Lelong wrote:
Hi, I'm writing an application that uses a serial port. I am using some kind of driver, but I'm not getting the expected results. So I would like to see what is written to and comming from the serial port. Since I use Ethereal to transparently snif the network, so I wonder if there exists something like it for the serial port. I googled and the only thing I thought usable was 'cat /dev/ttySx > data.dat &' but when I tried this the filesize was only one byte although there were sent and received many more. Is this usable for binary information ? For receive AND transmit ? Any suggestions are welcome ! Thanks. --
Koenraad, I have used several rs-232 monitors (sniffers) over the last 15 years. During that time I have tried several that run on the same PC that is sending/recieving the traffic and I have not found any that don't introduce problems (if they work at all). (My experience with serial monitor linux drivers is very limited, so you may find something that works.) I have been very happy with several external monitors. Typically they use a seperate monitor PC with 2 com ports. Then a special 4 headed serial cable is used to allow this computer to monitor all the traffic on the serial line. The cable should be included with any purchased software, or a pinout provided of it is GPL software. The monitor computer should not be a store and forward device. It should be purely passive and the communication still work even if it is off. This is accomplished by having _only_ the incoming pins of the 2 com ports wired. One of the com ports is used to listen (and listen only) to the data / pins coming out of your device. The other com port is used to listen to the data / pins going into your device. By doing the above, the communication path is totally unaffected by the monitor and you can be assured it is not introducing any anomolies. Greg -- Greg Freemyer The Norcross Group Forensics for the 21st Century
Wed, 08 Jun 2005, by k.lelong@ace-electronics.be:
Hi, I'm writing an application that uses a serial port. I am using some kind of driver, but I'm not getting the expected results. So I would like to see what is written to and comming from the serial port. Since I use Ethereal to transparently snif the network, so I wonder if there exists something like it for the serial port.
Look for 'serlook' on freshmeat It's a KDE app that seems to do the job well. Theo -- Theo v. Werkhoven Registered Linux user# 99872 http://counter.li.org ICBM 52 13 26N , 4 29 47E. + ICQ: 277217131 SUSE 9.2 + Jabber: muadib@jabber.xs4all.nl Kernel 2.6.8 + See headers for PGP/GPG info. Claimer: any email I receive will become my property. Disclaimers do not apply.
I used "slsnif" some time ago... -- Viele Grüße ------------------------------------------------------------------------ Michael Behrens
participants (4)
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Greg Freemyer -
Koenraad Lelong -
Michael Behrens -
Theo v. Werkhoven