Serial printer communication and the number of stop bits

[Kurt Pfeifle]

Preben wrote:

> I wonder why it's not possible to set the number of stop bits for the 
> serial printer communication?

It *IS* possible.

You can read up all additional parameters to modify behavior of the
serial backend here:

   http://localhost:631/help/spec-ipp.html?QUERY=device-uri#device-uri

Quote:

   "serial"
    -------
    The device-uri will be of the form
    "serial:/dev/filename?baud=value+parity=value+flow=value". The baud
    value is the data rate in bits per second; the supported values
    depend on the underlying hardware. The parity value can be one of
    "none", "even", or "odd". The flow value can be one of "none",
    "soft" (XON/XOFF handshaking), "hard" or "rts/cts" (RTS/CTS
    handshaking), or "dtrdsr" (DTR/DSR handshaking).

>From that I conclude that using a device URI similar to

    serial:/dev/ttyS0?parity=even
    serial:/dev/ttyS0?parity=odd

in your lpadmin command or in the web interface line edit box will do
what you want it to do.

-- 
Kurt Pfeifle
System & Network Printing Consultant ---- Linux/Unix/Windows/Samba/CUPS
Infotec Deutschland GmbH  .....................  Hedelfinger Strasse 58
A RICOH Company  ...........................  D-70327 Stuttgart/Germany