Serial Port

whiteghetto · 08-14-2008, 08:47 AM

Hello all and thanks for all your previous help.
I am using Ubuntu 8.04 with a USB > Serial adapter.

Is there a way I can send serial commands via a shell script?
Anyone able to provide some assistance in doing so?

TB0ne · 08-14-2008, 08:54 AM

Quote:

Originally Posted by whiteghetto

Hello all and thanks for all your previous help.
I am using Ubuntu 8.04 with a USB > Serial adapter.

Is there a way I can send serial commands via a shell script?
Anyone able to provide some assistance in doing so?

Try "echo <whatever command you want> > <device name>"

like:

echo "test output to serial terminal" > /dev/ttyUSB0

Replace the ttyXXX device with whatever yours is.

whiteghetto · 08-14-2008, 09:17 AM

thanks, I will try that out

also, is there a way to create a console connection in Ubuntu?
should I install Putty?

TB0ne · 08-14-2008, 10:58 AM

Quote:

Originally Posted by whiteghetto

thanks, I will try that out

also, is there a way to create a console connection in Ubuntu?
should I install Putty?

Install Putty where??? Putty (as far as I know), is for Windows. Linux has built-in SSH client and server capabilities.

Yes, there's a way to create a serial-console in Linux. Off the top of my head, I can't remember, but a quick Google should turn up something. It's not difficult, and involves getting agetty configured and running on a serial port..

jomen · 08-14-2008, 11:52 AM

or where you asking for something like gtkterm or minicom?
http://www.jls-info.com/julien/linux/
http://alioth.debian.org/projects/minicom/
http://en.wikipedia.org/wiki/Minicom

You can have putty in linux too - but you can do without - just a terminal and ssh will do.

whiteghetto · 08-14-2008, 01:02 PM

thanks for the help

I am able to connect in X with Putty, but my goal is to send commands to a machine via the serial connection in a shell script. I have been unable to see a way to do this with minicom.

My goal is to send "SL:01:6:10000,N" to the device connected on ttyUSB0 with a line speed of 19200

estabroo · 08-14-2008, 02:44 PM

You can use setserial to setup the line speed and other transmission options like 8n1, then just echo stuff to it as suggested in a previous post.

whiteghetto · 08-14-2008, 02:48 PM

thank you very much.
I will apt-get setserial and see if I can get it running

2damncommon · 08-14-2008, 03:34 PM

What are you sending serial commands to? You are logging onto another computer or device?
c-kermit can run scripted commands VIA serial.

whiteghetto · 08-15-2008, 08:05 AM

thanks again for the help.
I am testing some DSL equipment and sending commands to a loop length simulator.
I got it to work with this line

echo -e SL:01:8:3000,N '\r' > /dev/ttyUSB0

before this, I installed minicom and changed the default line speed to 19200