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RE: Serial bridge availability [1 Attachment]
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Some files from Patricks website that might be of use including a very
simplistic xap-bridge which he wrote.
Patrick did you forget about this?
From: xAP_developer@xxxxxxx [mailto:xAP_developer@xxxxxxx]
On Behalf Of Kevin Hawkins
Sent: 16 January 2010 16:14
To: xAP_developer@xxxxxxx
Subject: Re: [xAP_developer] Serial bridge availability
It's not me for Lantronix, although I would be most interested in that
code
if anyone has done this, as I have bucket loads of the MSS100 devices here
. I do have the SDK for them. These would make great xAP device servers
either as a xAP bridge or a xAP to RS232 <xyz protocol> control
device.
I do have xAP code for the Tibbo serial devices but not as a xAP bridge -
although that would be trivial to adapt.
P, I'm sure we can temporarily host your files on the xAP Automation site
- or that James can pop them on mi4 for you, as I know house moves take a
long time to recover from. 8 years on I still have a whole room full of
unopened Pickford boxes. The strange thing is we're not really missing
anything....
K
On 16/01/2010 14:56, Patrick Lidstone wrote:
Yes, for PC (win/linux -- and osx in theory but not tested in practice),
and
for rabbit microcontroller.
I guess the next question will be where can you download them from -
unfortunately that is contingent on me bringing my server back on line
following a house move.
I think someone (Kevin? Edward?) may have done something with lantronix
too.
Patrick
2010/1/16 Neil Wrightson <neilw@xxxxxxx>
So a serial bridge does not exist then?
Regards,
Neil Wrightson.
_____
From: xAP_developer@xxxxxxx [mailto:xAP_developer@xxxxxxx]
On Behalf Of Neil Wrightson
Sent: Thursday, 7 January 2010 6:29 AM
To: xAP_developer@xxxxxxx
Subject: RE: [xAP_developer] Serial bridge availability
Hi Patrick,
You hit the nail on the head.
I'm looking for a serial bridge to connect various AVR microcontrollers.
1. Do you have the PC based IP network to serial port application?
Would I be able to down load this from you?
2. On the Lantronix side, how did you set up this device? Did you somehow
pass all Ethernet xAP traffic to the RS232 side and also how did you send
it
from the RS232 back to the Ethernet? As in how did you tell the Lantronix
device that this is the start of a xAP message, buffer until I have sent
you
the full message and then transmit in a whole UDP packet.
Regards,
Neil Wrightson.
_____
From: xAP_developer@xxxxxxx [mailto:xAP_developer@xxxxxxx]
On Behalf Of Patrick Lidstone
Sent: Wednesday, 6 January 2010 10:20 PM
To: xAP_developer@xxxxxxx
Subject: Re: [xAP_developer] Serial bridge availability
I think the definition of serial bridge here is a serial based (RS232 or
RS485) device that participates in a 'conventional' UDP broadcast/ethernet
xAP network.
Typically this is achieved either using either a PC - and passing xAP
messages from the IP network to serial port and vice versa, or using an
embedded device such as the lantronix IP to serial converters. I have
implemented both at various points... it's useful for integrating really
low
end/low power devices such as temperature or movement sensors into the xAP
world whilst minimising the overall number of moving parts/improving
reliability over alternative approaches.
HTH
Patrick
2010/1/6 brett england <brett@xxxxxxx>
As in IP ->> Serial link ->> IP
Well I guess you could implement PPP on the serial link and the packet
would
just broadcast as per usual, if is on the same subnet.
Failing that writing a bridge wouldn't be too difficult.
What are you trying to do?
Brett
From: xAP_developer@xxxxxxx [mailto:xAP_developer@xxxxxxx]
On Behalf Of Neil Wrightson
Sent: 06 January 2010 10:51
To: xAP_developer@xxxxxxx
Subject: [xAP_developer] Serial bridge availability
Hi All,
Does a serial bridge exist for xAP?
I.e.
Bridging
xAP is, so far is as practicable, network agnostic. Where two networks are
to be joined, so that xAP messages can be passed between then, a software
bridge is used. The bridge understands the implementation details of the
xAP
protocol on each physical network, and performs the necessary protocol
conversions to pass the message from one network to another.
In some cases, the bridge may provide a configuration interface to allow
traffic in one or both directions to be restricted.
A proposal has been made to permit messages to be flagged
"non-routable" in
the xAP-Header, and for bridges to never pass these messages. Currently
this
item is still open.
Messages passed over the bridge always have the xAP-header hop count
increased. A bridge may be configured to discard messages with hop-count
> n
to prevent looping/broadcast storms.
Regards,
Neil Wrightson.
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<span style="font-weight: bold; font-size: 14px;" >[<a
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href="#TopText">Attachment(s)</a> from brett england
included below]</span>
<br><br>
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<div class=Section1>
<p class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Some files from Patricks website that might be of use
including
a very simplistic xap-bridge which he
wrote.<o:p></o:p></span></p>
<p class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Patrick did you forget about
this?<o:p></o:p></span></p>
<p class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm
0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US
style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span
lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>
xAP_developer@xxxxxxx
[mailto:xAP_developer@xxxxxxx]
<b>On Behalf Of </b>Kevin Hawkins<br>
<b>Sent:</b> 16 January 2010 16:14<br>
<b>To:</b> xAP_developer@xxxxxxx<br>
<b>Subject:</b> Re: [xAP_developer] Serial bridge
availability<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<div id=ygrp-mlmsg>
<div id=ygrp-msg>
<div id=ygrp-text>
<p>It's not me for Lantronix, although I would be most
interested in that
code if anyone has done this, as I have bucket loads of the
MSS100
devices here . I do have the SDK for them.
These would make
great xAP device servers either as a xAP bridge or a xAP to RS232
<xyz
protocol> control device. <br>
<br>
I do have xAP code for the Tibbo serial devices but not as a xAP bridge -
although that would be trivial to adapt.<br>
<br>
P, I'm sure we can temporarily host your files on the
xAP
Automation site - or that James can pop them on mi4 for you, as I know
house
moves take a long time to recover from. 8 years on I still have
a whole
room full of unopened Pickford boxes. The strange thing is we're
not
really missing anything....<br>
<br>
K<br>
<br>
On 16/01/2010 14:56, Patrick Lidstone wrote:
<o:p></o:p></p>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>
<p class=MsoNormal style='margin-bottom:12.0pt'>Yes, for PC
(win/linux -- and
osx in theory but not tested in practice), and for rabbit
microcontroller.<br>
I guess the next question will be where can you download them from -
unfortunately that is contingent on me bringing my server back on line
following a house move.<br>
I think someone (Kevin? Edward?) may have done something with lantronix
too.<br>
Patrick<o:p></o:p></p>
<div>
<p class=MsoNormal>2010/1/16 Neil Wrightson <<a
href="mailto:neilw@xxxxxxx";>neilw@xxxxxxx</a>><o:p></o:p></p>
<div>
<p class=MsoNormal
style='margin-bottom:12.0pt;background:white'><o:p> </o:p></p>
<p class=MsoNormal style='background:white'><span
style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>So a
serial bridge does not exist
then?</span><o:p></o:p></p>
<div>
<p class=MsoNormal
style='background:white'> <o:p></o:p></p>
</div>
<div>
<p style='background:white'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Regards,</span>
<o:p></o:p></p>
<p style='background:white'><b><span
style='font-size:13.5pt'>Neil Wrightson.</span></b>
<o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid blue 1.5pt;padding:0cm
0cm 0cm 0cm;
margin-top:5.0pt;margin-bottom:5.0pt'>
<p class=MsoNormal
style='background:white'><o:p> </o:p></p>
<div class=MsoNormal align=center
style='text-align:center;background:white'><span
lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal style='background:white'><b><span
lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
<a
href="mailto:xAP_developer@xxxxxxx";
target="_blank">xAP_developer@xxxxxxx</a>
[mailto:<a href="mailto:xAP_developer@xxxxxxx";
target="_blank">xAP_developer@xxxxxxx</a>]
<b>On Behalf Of </b>Neil Wrightson<br>
<b>Sent:</b> Thursday, 7 January 2010 6:29 AM
<o:p></o:p></span></p>
<div>
<p class=MsoNormal style='background:white'><span lang=EN-US
style='font-size:
10.0pt;font-family:"Tahoma","sans-serif"'><br>
<b>To:</b> <a href="mailto:xAP_developer@xxxxxxx";
target="_blank">xAP_developer@xxxxxxx</a><o:p></o:p></span></p>
</div>
<p class=MsoNormal
style='margin-bottom:12.0pt;background:white'><b><span
lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Subject:</span></b><span
lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
RE:
[xAP_developer] Serial bridge availability</span><span
lang=EN-US><o:p></o:p></span></p>
<div>
<div>
<p class=MsoNormal style='background:white'>
<o:p></o:p></p>
<div>
<p class=MsoNormal style='background:white'><span
style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>Hi
Patrick,</span><o:p></o:p></p>
<p class=MsoNormal
style='background:white'> <o:p></o:p></p>
<p class=MsoNormal style='background:white'><span
style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>You hit
the nail on the head.</span><o:p></o:p></p>
<p class=MsoNormal style='background:white'><span
style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>I'm
looking for a serial bridge to
connect various AVR
microcontrollers.</span><o:p></o:p></p>
<p class=MsoNormal
style='background:white'> <o:p></o:p></p>
<p class=MsoNormal style='background:white'><span
style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>1. Do
you have the PC based IP
network to serial port
application?</span><o:p></o:p></p>
<p class=MsoNormal style='background:white'><span
style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>
Would I be able
to down load this from you?</span><o:p></o:p></p>
<p class=MsoNormal
style='background:white'> <o:p></o:p></p>
<p class=MsoNormal style='background:white'><span
style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>2. On
the Lantronix side, how did
you set up this device? Did you somehow pass all Ethernet xAP traffic to
the
RS232 side and also how did you send it from the RS232 back to the
Ethernet? As
in how did you tell the Lantronix device that this is the start of a xAP
message, buffer until I have sent you the full message and then
transmit
in a whole UDP packet.</span><o:p></o:p></p>
<div>
<p class=MsoNormal
style='background:white'> <o:p></o:p></p>
</div>
<div>
<p style='background:white'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Regards,</span>
<o:p></o:p></p>
<p style='background:white'><b><span
style='font-size:13.5pt'>Neil Wrightson.</span></b>
<o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid blue 1.5pt;padding:0cm
0cm 0cm 0cm;
margin-top:5.0pt;margin-bottom:5.0pt'>
<div class=MsoNormal align=center
style='text-align:center;background:white'><span
lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal
style='margin-bottom:12.0pt;background:white'><b><span
lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
<a
href="mailto:xAP_developer@xxxxxxx";
target="_blank">xAP_developer@xxxxxxx</a>
[mailto:<a href="mailto:xAP_developer@xxxxxxx";
target="_blank">xAP_developer@xxxxxxx</a>]
<b>On Behalf Of </b>Patrick Lidstone<br>
<b>Sent:</b> Wednesday, 6 January 2010 10:20 PM<br>
<b>To:</b> <a href="mailto:xAP_developer@xxxxxxx";
target="_blank">xAP_developer@xxxxxxx</a><br>
<b>Subject:</b> Re: [xAP_developer] Serial bridge
availability</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='background:white'>
<o:p></o:p></p>
<div>
<p style='margin-bottom:12.0pt;background:white'>I think the
definition of
serial bridge here is a serial based (RS232 or RS485) device that
participates
in a 'conventional' UDP broadcast/ethernet xAP network.<br>
<br>
Typically this is achieved either using either a PC - and passing xAP
messages
from the IP network to serial port and vice versa, or using an embedded
device
such as the lantronix IP to serial converters. I have implemented both at
various points... it's useful for integrating really low end/low power
devices
such as temperature or movement sensors into the xAP world whilst
minimising
the overall number of moving parts/improving reliability over alternative
approaches.<br>
<br>
HTH<br>
Patrick<o:p></o:p></p>
<div>
<p class=MsoNormal style='background:white'>2010/1/6 brett england
<<a
href="mailto:brett@xxxxxxx";
target="_blank">brett@xxxxxxx</a>><o:p></o:p></p>
<div>
<p class=MsoNormal
style='margin-bottom:12.0pt;background:white'><o:p> </o:p></p>
<div>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><span style='font-size:11.0pt;color:#1F497D'>As
in IP
->> Serial link ->> IP
</span><o:p></o:p></p>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'> <o:p></o:p></p>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><span
style='font-size:11.0pt;color:#1F497D'>Well I guess you
could implement PPP on the serial link and the packet would just broadcast
as
per usual, if is on the same
subnet.</span><o:p></o:p></p>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><span
style='font-size:11.0pt;color:#1F497D'>Failing that
writing a bridge wouldn't be too
difficult.</span><o:p></o:p></p>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><span
style='font-size:11.0pt;color:#1F497D'>What are you
trying to do?</span><o:p></o:p></p>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><span
style='font-size:11.0pt;color:#1F497D'>Brett</span><o:p></o:p></p>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'> <o:p></o:p></p>
<div>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:0cm
0cm 0cm 0cm'>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><b><span lang=EN-US
style='font-size:10.0pt'>From:</span></b><span
lang=EN-US style='font-size:10.0pt'> <a
href="mailto:xAP_developer@xxxxxxx";
target="_blank">xAP_developer@xxxxxxx</a>
[mailto:<a href="mailto:xAP_developer@xxxxxxx";
target="_blank">xAP_developer@xxxxxxx</a>]
<b>On Behalf Of </b>Neil Wrightson<br>
<b>Sent:</b> 06 January 2010 10:51<br>
<b>To:</b> <a href="mailto:xAP_developer@xxxxxxx";
target="_blank">xAP_developer@xxxxxxx</a><br>
<b>Subject:</b> [xAP_developer] Serial bridge
availability</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'> <o:p></o:p></p>
<div>
<div>
<div>
<div>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><span style='font-size:10.0pt'>Hi
All,</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><span style='font-size:10.0pt'>Does a
serial bridge
exist for xAP?</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><span
style='font-size:10.0pt'>I.e.</span><o:p></o:p></p>
</div>
<div>
<h2
style='background:white'>Bridging<o:p></o:p></h2>
<p style='background:white'><span style='font-size:10.0pt'>xAP
is, so far is as
practicable, network agnostic. Where two networks are to be joined, so that
xAP
messages can be passed between then, a software bridge is used. The bridge
understands the implementation details of the xAP protocol on each physical
network, and performs the necessary protocol conversions to pass the
message
from one network to another. </span><o:p></o:p></p>
<p style='background:white'><span style='font-size:10.0pt'>In
some cases, the
bridge may provide a configuration interface to allow traffic in one or
both
directions to be restricted. </span><o:p></o:p></p>
<p style='background:white'><span style='font-size:10.0pt'>A
proposal has been
made to permit messages to be flagged "non-routable" in
the
xAP-Header, and for bridges to never pass these messages. Currently this
item
is still open. </span><o:p></o:p></p>
<p style='background:white'><span
style='font-size:10.0pt'>Messages passed over
the bridge always have the xAP-header hop count increased. A bridge may be
configured to discard messages with hop-count > n to prevent
looping/broadcast storms. </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
background:white'><span
style='font-size:10.0pt'>Regards,</span>
<o:p></o:p></p>
</div>
<div>
<p style='background:white'><b><span
style='font-size:13.5pt'>Neil Wrightson.</span></b>
<o:p></o:p></p>
</div>
</div>
</div>
<p class=MsoNormal
style='margin-bottom:12.0pt;background:white'><o:p> </o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
<p class=MsoNormal
style='background:white'><o:p> </o:p></p>
</div>
</blockquote>
</div>
<p class=MsoNormal
style='margin-bottom:12.0pt;background:white'><o:p> </o:p></p>
</div>
</div>
</blockquote>
</div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
</blockquote>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal><span
style='color:white'><o:p></o:p></span></p>
</div>
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