edmidor
6th Kyu
join:2008-05-19
Montreal, QC
| [x-WRT] RS-232 over wireless bridge
I need to connect two serial devices located far apart from each other. If I remember correctly, dd-wrt or open-wrt with USB support allows me to use RS232-to-USB adapters, so I thought it's possible to use two routers with RS232-to-USB adapters on both sides, and connect them in bridge or WDS mode.
Is it doable? What FW is better for that?
How do I map serial ports over ethernet? |
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stevech0
join:2006-09-17
San Diego, CA
 ·RoadRunner Cable
 ·VoicePulse
2 edits | nope.
Serial device over ethernet/WiFi to a PC is easy. Lots of vendors of serial to LAN converters, and they provide Windows driver for the PC so that the remote serial device appears to be a new COMn on the PC.
Lantronix
Moxa
WizNet
B&B Electronics
Black Box, Inc.
Lots of these on e-bay too.
serial to LAN/WiFi to serial is not as easy. I recall that with some, such as Moxa, you can pair these via static LAN addresses and port numbers, no PC. |
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edmidor
6th Kyu
join:2008-05-19
Montreal, QC
1 edit | Well, if we have RS232 ports on routers on both ends, it's just a matter of a simple daemons to pass data between local RS232 and the remote party. I hardly believe I'm the first who came up with this... so I hope there's some modded FW that supports this simple functionality. |
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Tursiops_G
Technoid
Premium,MVM
join:2002-02-06
Norwalk, CT
clubs:
·Optimum Online
| reply to edmidor
RS-232 is limited to approx. 20-50 Ft. (depending on Max Link Speed)...
For longer distances, using RS-232 to RS-422/RS-485 Converters at both ends (and using CAT-3 or CAT-5 cable between them), can extend the maximum distance up to 4,000 Ft... 
»www.rs485.com/rs485spec.html
-Tursiops_G.
--
If You're Unsure, "RTFM"... If You're SURE, "RTFM" Anyway. |
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edmidor
6th Kyu
join:2008-05-19
Montreal, QC
1 edit | The OP was about wireless bridging 
I don't think I can do cabling from upper floor to basement in any way to pass WAF (which means it got to be invisible in this or other way) |
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Tursiops_G
Technoid
Premium,MVM
join:2002-02-06
Norwalk, CT
clubs:
·Optimum Online
1 edit | said by edmidor  :The OP was about wireless bridging I don't think I can do cabling from upper floor to basement in any way to pass WAF (which means it got to be invisible in this or other way) Yup, I get your drift... ( »en.wikipedia.org/wiki/Woman_acce···e_factor ) 
Unless you can manage to replace the existing Phone wiring with CAT-5, and use the 2 extra pairs for a 2nd Data Jack, then Wireless is the only other alternative...
-Tursiops_G.
--
If You're Unsure, "RTFM"... If You're SURE, "RTFM" Anyway. |
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efflandt
join:2002-01-25
Elgin, IL
 ·AT&T Midwest
| reply to edmidor
There are little devices that go from serial to ethernet, but they are at work (no longer used) and not sure how they are configured or function. They are about the size of a 25-pin serial gender changer and have DIP switches.
Years ago our factory HP3000 used a dedicated line to our office with all serial devices for printers and terminal program on PC's connected to an HP box with multiple serial ports. When we changed to frame relay they put a serial to ethernet transciever on the old HP box and bridged that from our factory network (we were on a different subnet). Such a device could probably be easily connected to a wireless bridge.
The old HP3000 is now using special telnet clients for terminals and JetDirect for printing through a VPN over SDSL (DS3 at our factory).
I do have a USB to serial cable (using Windows driver) to access serial GPS from a PC, but am not familiar with any router USB or what that is capable of. Bluetooth acts like serial (COM port), but its range is limited. |
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stevech0
join:2006-09-17
San Diego, CA
·RoadRunner Cable
·VoicePulse
| said by efflandt :There are little devices that go from serial to ethernet, but they are at work (no longer used) and not sure how they are configured or function. They are about the size of a 25-pin serial gender changer and have DIP switches. Posting #2 above describes these and vendors. |
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