On 06/20/2011 10:05 AM, Alan Cox wrote: > On Mon, 20 Jun 2011 08:45:02 -0700 > Mike Wright <mike.wright@xxxxxxxxxxxxxx> wrote: > >> Hi all, >> >> This sure feels like a blast from the past :) >> >> I'm trying to figure out how to use com ports to communicate between two >> fedora boxes. >> >> I've figured out how to set the flow rate (stty /dev/ttyS0 115200) and >> to send data: I have an 80k text file that I "cat textfile > >> /dev/ttyS0" and by measuring the TX pin I see the voltage change from >> -11.34v to +4.4v for about 10 seconds. Seems to be working. >> >> The problem comes on the other end of the wire. The receiving machine >> is connected by a "null modem" cable. It seems that standard >> redirection should work but I can't figure out the proper shell syntax. >> >> Input should listen to /dev/ttyS0 and whenever something is received be >> sent to /dev/stdout > > cat /dev/ttyS0 > Yup, on the sending side: # cat filename >/dev/ttyS0 On the receiving side: # cat /dev/ttyS0 >filename Or, better yet, "yum install minicom" on both machines and run "minicom -D /dev/ttyS0" on each. Use "CTRL-A, S" to send a file on one and "CTRL-A, R" to receive the file on the other, complete with error checking using X-, Y- or Z-modem protocols. Man, takes me back to the days of CompuServe, GEnie and dial-up BBSs! -- ---------------------------------------------------------------------- - Rick Stevens, Systems Engineer, C2 Hosting ricks@xxxxxxxx - - AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 - - - - Lottery: A tax on people who are bad at math. - ---------------------------------------------------------------------- -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
