[aprssig] RE: WRT54G - now simple embedded computer

Greg D. ko6th_greg at hotmail.com
Wed Nov 21 23:14:10 EST 2007

Hi Bill,

You need something with real (buffered) serial ports on it.

I believe any pin on a Stamp can be used for a serial port - look at the SERIN command.  The main problem you will probably run into is that the Stamp only does one thing at a time.  If it's sucking in bits from one port, then it's not looking at the other one.  So after reading a character from one pin, you will miss the next one while you are pushing the first one out the second port.  

Does Parallax have anything with "real" ports on it?  Otherwise you might consider picking up an old X86 PC.  Probably cost a lot less than a Stamp, anyway.

Greg  KO6TH

> Date: Tue, 20 Nov 2007 17:18:48 +0000
> From: wa7nwp at gmail.com
> To: aprssig at lists.tapr.org
> Subject: [aprssig] RE: WRT54G - now simple embedded computer
> I've been searching for months for a simple embedded system that
> simply has two real serial ports.    Effectively all I want is to
> connect a standard landline modem to a standard external TNC.  I just
> need the computer to handle the handshaking and issue a couple modem
> ATxyz strings.   After that it would simply pass the bytes back and
> forth.  Any suggestions?   The Basic stamps are close but I haven't
> found one with two serial ports.
> Thanks,
> Bill - WA7NWP
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