[Sheflug] Stone Age Serial Comms

[James Wallbank <nospam [at] lowtech.org>]

Hi All,

I'm trying a bit of command-line serial comms (connecting two 
machines via serial ports) and I'm having trouble! One machine is a 
Linux box, the other a Psion. I've successfully set the correct baud 
rate, data bits, baud rate and stop bit with 'stty' and thus I can 
transfer text to the Psion's terminal window simply by:

echo test > /dev/ttyS0

or

cat test.txt > /dev/ttyS0

However, I can't yet find a way to do 8 bit file transfers. (I can 
transfer 7-bit files to the Psion's terminal window, but I can't save 
them off to disk.

The Psion only gives the options 'Kermit' and 'Y Modem'

How do I send and receive files from the command line? I presume 
there's some method of piping or involved command lines that are 
completely obvious after you've worked them out. I suspect they 
involve  ackwards redirecting '</dev/ttyS0' and/or gratuitous use of 
ampersands. Please help! I've tried the serial HOWTO but what I need 
are specific examples.

Also, can I set the 'echo' thingey so that when I type in at the 
Psion I see the result on the Linux box, and/or vice-versa?

Any ideas?

Cheers,

James
=====
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who: James Wallbank
org: Redundant Technology Initiative
tel: +44 114 2495522
fax: +44 114 2495533
eml: rti [at] lowtech.org
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      Sheffield
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