From: Adam Shelly <adam.shelly@...>
Date: 2005-12-16T06:43:27+09:00
Subject: Re: setting serial port settings

On 12/15/05, dperkins@frii.com <dperkins@frii.com> wrote:
> I'm writing a simple script that talks to a device on a PC serial port.  I
> need to be able to set the port settings (baud, bits, parity) but I have
> not found a way to do this.  How can I do this?

I don't know if you can do it directly from ruby, but you can use a
system command.
On windows

irb(main):005:0> system "MODE COM3 BAUD=1200"

Status for device COM3:
-----------------------
    Baud:            1200
    Parity:          Even
    Data Bits:       7
    Stop Bits:       1
    Timeout:         OFF
    XON/XOFF:        OFF
    CTS handshaking: OFF
    DSR handshaking: OFF
    DSR sensitivity: OFF
    DTR circuit:     ON
    RTS circuit:     ON

=> true

C:\>help mode
Configures system devices.

Serial port:       MODE COMm[:] [BAUD=b] [PARITY=p] [DATA=d] [STOP=s]
                                [to=on|off] [xon=on|off] [odsr=on|off]
                                [octs=on|off] [dtr=on|off|hs]
                                [rts=on|off|hs|tg] [idsr=on|off]

...


> This script will run in a DOS window on Windows, but I might need to use
> it with Linux later.
>
I'll let a linux guru tell you the correct command there.

-Adam