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Sending commands to serial port - question
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Tom  
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 More options Nov 2 2011, 11:17 am
Newsgroups: comp.protocols.kermit.misc
From: Tom <tdenham...@gmail.com>
Date: Wed, 2 Nov 2011 08:17:19 -0700 (PDT)
Local: Wed, Nov 2 2011 11:17 am
Subject: Sending commands to serial port - question
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Hello,

I'm new to Kermit...this is my first very simple script.

I am running Ubuntu and trying to make a script to automate a way to
send commands to a serial device.

I need to toggle the device with ^S004AUX0 (off) and ^S004AUX1 (on).

I'm able to connect like so:

#!/usr/bin/kermit +

set modem type Serial       ; There is no modem
set line /dev/ttyUSB0         ; Specify device name
set carrier-watch off           ; If DTR and CD are not cross-
connected
set speed 9600                 ; Or other desired speed
set flow xon/xoff                ; If you can't use RTS/CTS
set parity none                  ; (or "mark" or "space", if
necessary)
set stop-bits 1                   ; (rarely necessary)
connect                            ; this is where I get lost on the
automation and have to enter manual.

From here I can type ^S004AUX0 and toggle the device off (or on), but
would like to automate this part.  It's probably pretty simple for
anyone who's used kermit more than a day:)

Can this be automated in the kermit script?  If so...can someone show
an example?

Thanks in advance!


 
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Tom  
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 More options Nov 2 2011, 11:25 am
Newsgroups: comp.protocols.kermit.misc
From: Tom <tdenham...@gmail.com>
Date: Wed, 2 Nov 2011 08:25:38 -0700 (PDT)
Local: Wed, Nov 2 2011 11:25 am
Subject: Re: Sending commands to serial port - question
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On Nov 2, 11:17 am, Tom <tdenham...@gmail.com> wrote:

Also...how would one exit the script after running.  Thanks.

 
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Bill Pechter  
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 More options Nov 2 2011, 1:38 pm
Newsgroups: comp.protocols.kermit.misc
From: pech...@pechter.dyndns.org (Bill Pechter)
Date: Wed, 2 Nov 2011 17:38:49 +0000 (UTC)
Local: Wed, Nov 2 2011 1:38 pm
Subject: Re: Sending commands to serial port - question
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In article <b2118d91-abe7-4967-b026-42c421648...@h34g2000yqd.googlegroups.com>,

You may need to set flow to something other than xon/xoff. ^S is xoff.
So... when you send ^S (I assume it's control-s) and not Caret-S you
stop the data flow.

Bill

--
--
Digital had it then.  Don't you wish you could buy it now!
              pechter-at-pechter.dyndns.org


 
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Christian Corti  
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 More options Nov 2 2011, 1:15 pm
Newsgroups: comp.protocols.kermit.misc
From: Christian Corti <u...@reply.to>
Date: Wed, 2 Nov 2011 18:15:38 +0100
Local: Wed, Nov 2 2011 1:15 pm
Subject: Re: Sending commands to serial port - question
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Hm, I'd use a totally different approach:

# stty -F /dev/ttyUSB0 ixon 9600 -parenb (only needed once after boot)
# echo -n "^S004AUX0" >/dev/ttyUSB0
or
# echo -n "^S004AUX1" >/dev/ttyUSB0

You can ommit the -n parameter if a CR after the command won't hurt.

Christian


 
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Robert Bonomi  
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 More options Nov 3 2011, 5:28 am
Newsgroups: comp.protocols.kermit.misc
From: bon...@host122.r-bonomi.com (Robert Bonomi)
Date: Thu, 03 Nov 2011 04:28:04 -0500
Local: Thurs, Nov 3 2011 5:28 am
Subject: Re: Sending commands to serial port - question
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In article <b2118d91-abe7-4967-b026-42c421648...@h34g2000yqd.googlegroups.com>,

Trivially.

the secret is "do -not- use 'connect'".

At the kermit prompt, type "help output".

>                                             If so...can someone show
>an example?

kermit> output ^S004AUX0

Note: if '^S' is [CTRL-S], aka [XOFF], aka [DC3], you probably want
'set flow-control none' --  if that control-s is echoed back to the
port on the PC, kermit's xon/xoff flow-control support wills *STOP*
sending any further characters to the device until an XON/[CTRL-Q]/
[DC1] character is received from the other device.


 
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