NAME

       sane-hp3900 - SANE backend for RTS8822 chipset based scanners

DESCRIPTION

       The sane-hp3900 library implements a SANE (Scanner Access Now Easy) backend that provides access at least
       to the following USB flatbed scanners:

              Model:                     Chipset:
              ------                     --------
              HP ScanJet 3800            RTS8822BL-03A
              HP ScanJet 3970            RTS8822L-01H
              HP ScanJet 4070 Photosmart RTS8822L-01H
              HP ScanJet 4370            RTS8822L-02A
              HP ScanJet G2710           RTS8822BL-03A
              HP ScanJet G3010           RTS8822L-02A
              HP ScanJet G3110           RTS8822L-02A
              UMAX Astra 4900/4950       RTS8822L-01H *
              BenQ 5550                  RTS8823L-01E *

       More details can be found on the hp3900 backend homepage http://sourceforge.net/projects/hp3900-series/.

       This is ALPHA software. Keep your hand at the scanner's plug and unplug it, if scanner does not start  to
       scan. See also the BUGS section.

       If  you  own  a scanner other than the ones listed above that works with this backend, please let us know
       this by sending  the  scanner's  exact  model  name  and  the  USB  vendor  and  device  ids  (e.g.  from
       /proc/bus/usb/devices,  sane-find-scanner  or  syslog) to us. Even if the scanner's name is only slightly
       different from the models mentioned above, please let us know.

CONFIGURATION

       The contents of the hp3900.conf file is a list of usb  lines  containing  vendor  and  product  ids  that
       correspond  to USB scanners. The file can also contain the names of device files that correspond to an HP
       39XX scanner.  Empty lines and lines starting with a  hash  mark  (#)  are  ignored.   The  scanners  are
       autodetected  by  usb  vendor_id  product_id  statements  which  are  already  included into hp3900.conf.
       "vendor_id" and "product_id" are hexadecimal numbers that identify the scanner. If autodetection does not
       work, add the device name of your scanner to the configuration file,

FILES

       @CONFIGDIR@/hp3900.conf
              The backend configuration file (see also description of SANE_CONFIG_DIR below).

       @LIBDIR@/libsane-hp3900.a
              The static library implementing this backend.

       @LIBDIR@/libsane-hp3900.so
              The shared library implementing this backend (present on systems that support dynamic loading).

ENVIRONMENT

       SANE_CONFIG_DIR
              This  environment  variable  specifies  the list of directories that may contain the configuration
              file.  Under UNIX, the directories are separated by a colon (`:'), under OS/2, they are  separated
              by  a  semi-colon  (`;').   If this variable is not set, the configuration file is searched in two
              default directories: first, the current working directory (".") and then in @CONFIGDIR@.   If  the
              value  of  the  environment variable ends with the directory separator character, then the default
              directories are searched  after  the  explicitly  specified  directories.   For  example,  setting
              SANE_CONFIG_DIR to "/tmp/config:" would result in directories "tmp/config", ".", and "/etc/sane.d"
              being searched (in this order).

       SANE_DEBUG_HP3900
              If the library was compiled with debug support enabled, this  environment  variable  controls  the
              debug level for this backend.  Higher debug levels increase the verbosity of the output.

              Example: export SANE_DEBUG_HP3900=4

SEE ALSO

       sane(7), sane-usb(5),
       http://sourceforge.net/projects/hp3900-series/ http://jkdsoftware.dyndns.org/drupal/?q=es/books/151

AUTHOR

       Jonathan Bravo Lopez <jkdsoft@gmail.com>

BUGS

       Scanning  is  only  tested  with  Linux/ix86/gcc.  Be careful when testing on other operating systems and
       especially on big-endian platforms. The scanner may get wrong data.

@PACKAGEVERSION@                                   06 Jan 2009                                    sane-hp3900(5)