I bought notebook few days ago and of course it doesn't have serial port :) I'm interested in satellite technology and most satellite receivers use serial port for communication with computer. That's why I need serial port. Since my notebook doesn't have it, only solution is to use USB to RS232 converter. Can it completely "mimic" serial port which can be found on older PC motherboards? Are there some limitations? Best regards
My experience has been that at least the control signals DTR/DSR and RTS/CTS are usually supported in USB to RS232 cables. Don't know whether any other seldom used pins are.
I would stick with cables using FTDI chipsets, as I know they have these four handshake signals (along with TXD and RXD):
This chipset even has DCD and RI, so it has all the signals present on an RS232 DB-9 connector.
There are several USB to RS-233 cables on Amazon, search for USB RS232 FT232R. Drivers are included in Windows 8 and later; you may have to download them for Windows 7 and earlier.
Look at commercial grade USB RS232 adapters such as Edgeport by Digi, they are about 2-4 times as expensive as the cheap USB adapters, but they can give you as close to a pure RS232 experience as possible, even maintaining the same Com port regardless of the USB port they are connected to. These will also give you all signal lines including RI as well.
Digi Edgeport, Moxa, but also cables with FTDI chipset should offer the full handshake logic.
The problem was in the past sometimes that on the Windows driver side, more exotic things like BREAK states or "RTS On Send" (RTS_CONTROL_TOGGLE in Windows Communication API) were not supported.
In the recent years I have not run into any related issues any more.