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'[EE] Remote serial port solution'
2010\06\09@160756 by Bob Ammerman

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I have an application where I need to be able to have a remote serial port.

The existing Windows application is expecting to talk to a COM port.

The device it wants to talk to, which has a standard serial interface, is a
long ways away.

I am looking for a way to remote the serial port over TCP/IP.

In other words, the product I am looking for would have two components:

1) Software that ran under Windows to provide a virtual COM port and
redirect it to a TCP/IP connection.

2) A black box of some sort that would connect to an Ethernet cable and
provide the remote serial port.

Any ideas?

Thanks,

-- Bob Ammerman
RAm Systems

2010\06\09@161511 by Dario Greggio

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Bob Ammerman ha scritto:
> I have an application where I need to be able to have a remote serial port.
>
> The existing Windows application is expecting to talk to a COM port.

Am I wrong or the Microchip TCPIP stack does include the
UART-over-Ethernet application, the virtual COM driver and, of course,
the hardware?


--

Ciao, Dario
--
Cyberdyne

2010\06\09@161524 by Alex Harford

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On Wed, Jun 9, 2010 at 1:07 PM, Bob Ammerman <spam_OUTrvammermanTakeThisOuTspamroadrunner.com> wrote:
> I have an application where I need to be able to have a remote serial port.
>
> The existing Windows application is expecting to talk to a COM port.
>
> The device it wants to talk to, which has a standard serial interface, is a
> long ways away.
>
> I am looking for a way to remote the serial port over TCP/IP.

It doesn't exactly fit your specifications, but these guys make black
boxes to do serial<->Ethernet:

www.netburner.com/products/serial_to_ethernet.html

2010\06\09@161755 by Marcel Birthelmer

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face
On Wed, Jun 9, 2010 at 10:07 PM, Bob Ammerman <.....rvammermanKILLspamspam@spam@roadrunner.com> wrote:
> I have an application where I need to be able to have a remote serial port.
>
> The existing Windows application is expecting to talk to a COM port.
>
> The device it wants to talk to, which has a standard serial interface, is a
> long ways away.
>
> I am looking for a way to remote the serial port over TCP/IP.
>
> In other words, the product I am looking for would have two components:
>
> 1) Software that ran under Windows to provide a virtual COM port and
> redirect it to a TCP/IP connection.
>
> 2) A black box of some sort that would connect to an Ethernet cable and
> provide the remote serial port.
>
> Any ideas?

http://www.netmedia.com/siteplayer/telnet/index.html

I've used their other siteplayer product, the web server, and that
works sort of ok. No experience with this part though.

2010\06\09@162346 by zipwize

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I recommend the Lantronix model UDS1100.


----- Original Message -----
From: "Bob Ammerman" <rvammermanspamKILLspamroadrunner.com>
To: "Microcontroller discussion list - Public." <.....piclistKILLspamspam.....mit.edu>
Sent: Wednesday, June 9, 2010 4:07:55 PM GMT -05:00 US/Canada Eastern
Subject: [EE] Remote serial port solution

I have an application where I need to be able to have a remote serial port.

The existing Windows application is expecting to talk to a COM port.

The device it wants to talk to, which has a standard serial interface, is a
long ways away.

I am looking for a way to remote the serial port over TCP/IP.

In other words, the product I am looking for would have two components:

1) Software that ran under Windows to provide a virtual COM port and
redirect it to a TCP/IP connection.

2) A black box of some sort that would connect to an Ethernet cable and
provide the remote serial port.

Any ideas?

Thanks,

-- Bob Ammerman
RAm Systems

2010\06\09@163238 by Brent Brown

picon face
On 9 Jun 2010 at 16:07, Bob Ammerman wrote:
> In other words, the product I am looking for would have two components:
>
> 1) Software that ran under Windows to provide a virtual COM port and
> redirect it to a TCP/IP connection.
>
> 2) A black box of some sort that would connect to an Ethernet cable and
> provide the remote serial port.
>
> Any ideas?

For software that creates a virtual serial port in Windows and redirects data to/from
a TCP/IP port I have found this free tool very helpful...
http://www.hw-group.com/products/hw_vsp/index_en.html

For hardware serial to Ethernet devices I usually look first at Lantronix XPort
devices...
www.lantronix.com/device-networking/embedded-device-servers/?tab=0
Lantronix also offer virtual COM port redirection software, but I prefer the HW-
Group program above.

--
Brent Brown, Electronic Design Solutions
16 English Street, St Andrews,
Hamilton 3200, New Zealand
Ph: +64 7 849 0069
Fax: +64 7 849 0071
Cell: +64 27 433 4069
eMail:  EraseMEbrent.brownspam_OUTspamTakeThisOuTclear.net.nz


2010\06\09@163807 by Olin Lathrop

face picon face
Bob Ammerman wrote:
> 1) Software that ran under Windows to provide a virtual COM port and
> redirect it to a TCP/IP connection.

If your machine has two serial ports, connect them together and then write a
program that transfers the bytes from the second serial port via TCP.  Or, a
dumb PC that is the serial to ether converter.

> 2) A black box of some sort that would connect to an Ethernet cable
> and provide the remote serial port.

Another dumb PC running much the same program, except this one only needs
one COM port.

Of course hardware and software could be developed for this with a PIC
18F67J60, but I get the impression you need this as a tool now.


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.

2010\06\09@164903 by Bob Ammerman

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face
> Bob Ammerman ha scritto:
>> I have an application where I need to be able to have a remote serial
>> port.
>>
>> The existing Windows application is expecting to talk to a COM port.
>
> Am I wrong or the Microchip TCPIP stack does include the
> UART-over-Ethernet application, the virtual COM driver and, of course,
> the hardware?
> Ciao, Dario


Thanks, but I'm looking for a 'shrink-wrapped' solution.

-- Bob Ammerman
RAm Systems

2010\06\09@170340 by Charles Craft

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"standard serial interface"
Hee hee, ha ha - ouch, my side hurts from laughing.  :-)
RS-232 means 232 possible cable configurations.

Does the application or device need to wiggle any of the control lines?

On 6/9/2010 4:07 PM, Bob Ammerman wrote:
{Quote hidden}

2010\06\09@170917 by Michael Watterson

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Bob Ammerman wrote:
{Quote hidden}

Any router that has a internal console header can have serial port added.
http://www.techtir.ie/node/1001246
http://www.techtir.ie/node/1001245

You can also buy many brands of serial port servers.
You can access via telenet or install a virtual serial port driver.
There are various free and paid solutions.
You can use any Linux Micro ITX or netbook and add a USB to serial
adaptor (if it has no serial port) and use various solutions to make
that box appear as local serial port on windows (as per the
OpenWRT/Windows example)
With a router has the the serial port host you can set up firewall rules
so only a particular IP connects via Internet.

The OpenWRT on Linksys WRT54G3G allows connecting its real serial port
to PC via LAN (WiFi or ethernet), WAN ethernet (say to cable modem) or
3G/HSPA Modem. Maplin's PCMCIA USB2.0 adaptor allows many USB modems,
but I only used Serria Wireless PCMCIA 3G and Qualcomm Flash-OFDM PCMCIA
cards.

I demoed TWO Linksys WRT54G3G with Flash-OFDM WAN modems on OpenWRT
(white Russian, Kamakaze isn't suitable for that router) rather than 3G
Modems, one as "client" (as if it it is your Windows PC)  and one as
"server"  to connect a Traffic light controller to main system
controller over Internet with both ends "plug n play" serial as if a
long serial cable.

I think the "black box" company sells prepacked solutions for LAN.



2010\06\09@172018 by Michael Watterson

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Charles Craft wrote:
> "standard serial interface"
> Hee hee, ha ha - ouch, my side hurts from laughing.  :-)
> RS-232 means 232 possible cable configurations.
>
> Does the application or device need to wiggle any of the control lines?
>  
or weird numbers of  bits at only 110bps  with parity. Traffic lights do :(

Well there are about 20 possible combinations you mostly will cover
everything with :-). The double ended 25way dongle with red & green LEDs
for every signal is handy :)

Do we want straight or Null Modem?
Is sex normal or reversed?
how is it using/abusing the 5 main handshake pins?



2010\06\09@172429 by Dario Greggio

face picon face
Bob Ammerman ha scritto:

> Thanks, but I'm looking for a 'shrink-wrapped' solution.

I see Bob, ok

--

Ciao, Dario
--
Cyberdyne

2010\06\09@175833 by Marcel Duchamp

picon face
As others mentioned, the Lantronix xport product should do exactly what
you want.  You connect to its serial DB9 conn and plug its RJ45 into
your ethernet.  Reverse everything at the other end.  Needs a wall wart
or some power source.

On 6/9/2010 1:07 PM, Bob Ammerman wrote:
{Quote hidden}

2010\06\09@180420 by William \Chops\ Westfield

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On Jun 9, 2010, at 1:07 PM, Bob Ammerman wrote:

> The existing Windows application is expecting to talk to a COM port.
>
> The device it wants to talk to, which has a standard serial  
> interface, is a
> long ways away.
>
> I am looking for a way to remote the serial port over TCP/IP.

"Serial servers" (aka, "console servers", "terminal servers") that use  
standard protocols (telnet and ssh, mostly) are standard items, as is  
software for PCs that will run virtual com ports over such  
connections.  As others have implied, whether this will work for a  
particular application depends somewhat on how demanding the  
application is of serial port features.  Plain test data transfer is  
extremely likely to work, things that rely on wiggling other rs232  
signals and changing bitrates in tightly controlled timing (like some  
of those PIC programmers): rather less likely.

Lantronix seems to be a big player in the low-density (one and two  
port) serial server area; they've been in the business a long time.  
If the remote site already has equipment, it may already have a serial  
port available.  For example, most cisco routers have a seldom-used  
"aux" port that can be used for this sort of application, and a linux  
PC with serial ports can almost certainly be turned into either or  
both ends of the connection using open source software...

BillW

2010\06\09@181459 by Nicola Perotto

picon face


On 09/06/2010 22.07, Bob Ammerman wrote:
> I have an application where I need to be able to have a remote serial port.
>
> The existing Windows application is expecting to talk to a COM port.
>
> The device it wants to talk to, which has a standard serial interface, is a
> long ways away.
>    
I found this (free):


       Virtual Serial Ports Emulator

http://www.eterlogic.com/Products.VSPE.html

VSPE is intended to help software engineers and developers to
create/debug/test applications that use serial ports. It is able to
create various virtual devices to transmit/receive data. Unlike regular
serial ports, virtual devices have special capabilities: for example,
the same device can be opened more than once by different applications,
that can be useful in many cases. With VSPE you are able to share
physical serial port data for several applications, expose serial port
to local network (via TCP protocol), create virtual serial port device
pairs and so on.
Key features

    * Virtual device: connector
    * Virtual device: data splitter
    * Virtual device: pair
    * Mapper device
    * User mode device: TcpServer
    * User mode device: TcpClient
    * User mode device: Serial Redirector
    * User mode device: UDP Manager
    * User mode device: Bridge
    * Python scripting system
    * x86 and x86_64 processor architecture support
    * VSPE API (C/C++ header and static library) for native language
developers
    * VSPE API Python bindings for Python developers
    * Embedded HTTP server
    * Data monitoring



2010\06\09@181534 by YES NOPE9

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Perhaps WIZNET will work for you as a virtual serial port .......
wiznethk.blogspot.com/2010/02/virtual-serial-port-program-wiz-vsp.html
Sparkfun and others seem to have small PCBs.   ~$25

Gus
Denver

2010\06\09@183004 by Alan Schnittman

picon face

At 04:32 PM 6/9/2010, Brent Brown writes:
>On 9 Jun 2010 at 16:07, Bob Ammerman wrote:
>> In other words, the product I am looking for would have two components:
>>
>> 1) Software that ran under Windows to provide a virtual COM port and
>> redirect it to a TCP/IP connection.
>>
>> 2) A black box of some sort that would connect to an Ethernet cable and
>> provide the remote serial port.
>>
>> Any ideas?
>
>For software that creates a virtual serial port in Windows and
>redirects data to/from
>a TCP/IP port I have found this free tool very helpful...
>www.hw-group.com/products/hw_vsp/index_en.html
>
>For hardware serial to Ethernet devices I usually look first at
>Lantronix XPort
>devices...
>www.lantronix.com/device-networking/embedded-device-servers/?tab=0
>Lantronix also offer virtual COM port redirection software, but I
>prefer the HW-
>Group program above.
>


We evaluated (about a year ago) the virtual serial port driver that
Brent recommends.  It was easy to configure and worked well for the
short term.  Neither my employer nor our client would accept the
license terms for the freeware version.  We considered purchasing a
license, but there were some communication outages attributed to a
hang-up in this driver when link was run continuously for long
periods of time so I considered other software.

This is the product we eventually purchased:

SI4RS1  Serial/IP ­ 1 Port   Per license $100.00
http://www.tacticalsoftware.com/products/serialip.htm


-- Alan

2010\06\09@185029 by Isaac Marino Bavaresco

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Em 9/6/2010 18:03, Charles Craft escreveu:
> "standard serial interface"
> Hee hee, ha ha - ouch, my side hurts from laughing.  :-)
> RS-232 means 232 possible cable configurations.
>  

Perhaps 2 raised to the 32nd power possibilities :)

Isaac

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2010\06\09@193729 by Vitaliy

face
flavicon
face
Brent Brown wrote:
>> In other words, the product I am looking for would have two components:
>>
>> 1) Software that ran under Windows to provide a virtual COM port and
>> redirect it to a TCP/IP connection.
>>
>> 2) A black box of some sort that would connect to an Ethernet cable and
>> provide the remote serial port.
>>
>> Any ideas?
>
> For software that creates a virtual serial port in Windows and redirects
> data to/from
> a TCP/IP port I have found this free tool very helpful...
> http://www.hw-group.com/products/hw_vsp/index_en.html

We're using this tool with our WiFi scan tools. It works with pretty much
any Ethernet to RS232 adapter (IIRC, we used one by Saelig, cost around
$80).

Vitaliy

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