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Full Discussion: Writing to a Serial Port
Top Forums Web Development Writing to a Serial Port Post 302922231 by wisecracker on Thursday 23rd of October 2014 11:14:18 AM
Old 10-23-2014
Quote:
"Again what is connected to your serial port, NOT what you are trying to connect to?"
The scale.
So you have a scale local to you that you can see and physically connect to?

This would have to be connected to the serial port using a cable then? Yes?
(This was the answer I was looking for.)

Does the scale require a Null Modem Cable or an Extension type?
If it is an Extension type then connect to your serial port and use your loopback plug at the other end and try the earlier test again.

Assuming the scale has RS232 transfer; what are the serial parameters and can it be used in raw data transfer mode?
'stty' is probably your best means of changing /dev/ttyS0 transfer parameters.

Do fault diagnosis step by step.
 

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nsd-xfer(8)							    nsd 3.2.12							       nsd-xfer(8)

NAME
nsd-xfer - AXFR client to transfer zones from a name server SYNOPSIS
nsd-xfer [-4] [-6] [-a address[@port]] [-p port] [-s serial] [-T tsiginfo] [-v] -z zone -f file servers DESCRIPTION
Nsd-xfer is program to transfer zones from a name server using AXFR. NSD is a complete implementation of an authoritative DNS nameserver. OPTIONS
-4 Only send to IPv4 addresses. -6 Only send to IPv6 addresses. -a address[@port] Specify the source address (and port) to send from. -f file The file to store the zone in. -p port Specify the port to send to. -s serial Specify the serial of the current zone. The zone is only transferred if the master server has a zone with a greater serial number. -T tsiginfo Use TSIG to verify the zone transfer. The tsiginfo file must contain the TSIG key information. The file is removed upon successful reading of the key. The format of the tsiginfo file is described in the doc/README file (section 3.3). -v Be more verbose. -z zone Specify the zone to receive. servers List of nameservers to try. EXAMPLES
To run this program the standard way type: # nsd-xfer -z foobar.cz -f foobar.cz.zone 1.2.3.4 SEE ALSO
nsd(8), nsdc(8), nsd.conf(5), nsd-checkconf(8), nsd-notify(8), nsd-patch(8), zonec(8) AUTHORS
NSD was written by NLnet Labs and RIPE NCC joint team. Please see CREDITS file in the distribution for further details. NLnet Labs jul 19, 2012 nsd-xfer(8)
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