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Serial-over-USB driver/emulator required.

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October 4, 2012 11:05:57 AM

Not sure if this is the right forum to ask this question in, but I have a module that is part of blade system chassis that has an RS-232 serial connection, using a mini-USB port.

This module has a full integrated Linux OS, so it's happy to respond on its mini-USB port, to PuTTY/Telnet type connection requests and offers a full account security capability etc.

I'd like to connect my laptop (running Win XP SP3 32-bit) to this module, using a USB port in my laptop with a cable that has a mini-USB port on one end, and a normal USB connector on the other end.

What I want to ask about is what do I need, in terms of software or device drivers, to make this happen?

Here's a crude diagram of what I'm trying to connect together:

[MODULE with RS-232 connection using mini-USB port] <-------- Mini-USB connector -- CABLE -- Normal USB connector --------> [Laptop with USB port]

Will it work straight away or do I need some kind of Serial-over-USB device driver/emulator software or other software that will allow my USB port (on my laptop) to 'act' as a serial port and connect to the module's mini-USB?
a b B Homebuilt system
October 4, 2012 12:01:08 PM

All the RS-232-to-USB cables I know of have a RS-232 plug at one end and an USB at the other and they come with the required software to emulate a serial port on your laptop. RS-232 using a mini-USB port sounds a little strange to me. I can imagine though that it is a usb port that provides a terminal access. Do you have a model name or something? Maybe we can find a manual for it. If it is like i think, you need the cable with the right plugs and putty, that's it.
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October 4, 2012 12:25:06 PM

@ noidea_77: Thanks for your reply on this. The manual for this module says:

"Serial-management connector
The serial-management connector (RS-232, mini-USB form factor) is used to connect the CMM to a management device, through a serial cable or serial management network, to manage the chassis. This connector provides local access for the CMM to the Serial over LAN (SOL) interface of any compute node. For example, you can connect a notebook computer to the serial-management connector and use a terminal emulator program to configure the IP addresses, user accounts, and other settings."

The mini-USB port has the following pin assignments:

"serial-management connector is an EIA-561 (mini-USB) connector with the following pin assignments.
Contact (pin number) > Signal name
1 > NC
2 > Receive (RX)
3 > Transmit (TX)
4 > NC
5 > Ground (GND)"

So the module's RS-232 connection has a mini-USB form factor port.

I appreciate that all RS-232-to-USB cables have serial port on one end and USB on the other and they come with emulation software or something like that.

But what I want to know is whether there's a way to connect to this module's serial (mini-USB) port, from a laptop's standard USB port, using either some kind of device driver or emulation software?
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a b B Homebuilt system
October 4, 2012 3:05:43 PM

So it's in fact a RS-232 port. If you mange to get a cable with the right pugs and you laptop has a serial port you only need a terminal program like teraterm to connect to the device.
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October 4, 2012 8:31:13 PM

@ noidea_77: I don't think you've read my original post properly, nor understand what I'm asking for - I find this fairly typical of this Web site.

I never said it wasn't an RS-232 port on the module. I never said that my laptop has an RS-232 port either. And I'm not interested in a USB-to-Serial cable. This is NOT the answer that I'm looking for...

The module's management port is an RS-232 port, in the form factor of a mini-USB.

The laptop ONLY has normal USB ports.

I want a cable that will connect into the mini-USB port of the module (presumably, this will be WIRED with RS-232 standards), on ONE END and have a normal USB connector on the OTHER END.

If the above is possible, I would then like some kind of software utility that will read serial signals on the module end and translate these into USB on the laptop end, and vice versa.

I suspect I'm barking up the wrong tree and there is no such useful cable or utility.
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a b B Homebuilt system
October 4, 2012 9:54:00 PM

zedzeecorp said:
@ noidea_77: I don't think you've read my original post properly, nor understand what I'm asking for - I find this fairly typical of this Web site.

I never said it wasn't an RS-232 port on the module. I never said that my laptop has an RS-232 port either. And I'm not interested in a USB-to-Serial cable. This is NOT the answer that I'm looking for...

The module's management port is an RS-232 port, in the form factor of a mini-USB.

The laptop ONLY has normal USB ports.

I want a cable that will connect into the mini-USB port of the module (presumably, this will be WIRED with RS-232 standards), on ONE END and have a normal USB connector on the OTHER END.

If the above is possible, I would then like some kind of software utility that will read serial signals on the module end and translate these into USB on the laptop end, and vice versa.

I suspect I'm barking up the wrong tree and there is no such useful cable or utility.


And your problem is that you have now idea what you are talking about! The manual you posted clearly says that the wiring of those port is RS-232 and there will be and never can be a software that translates this, because a RS-232 port will electrically never talk to an USB port! You asked, I know and you don't understand! Stop yelling at people who want to help!
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October 10, 2012 1:08:52 PM

You know, your response is quite typical of this whole Web site's forums; condescending and elitist. My responses do not contain "!" all over them - my CAPITALS are to highlight what I was trying to get at.

If your original response had said "RS-232 port will electrically never talk to an USB port", then my question would've been answered.

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