Apr 112013
 

As we have posted earlier, we own an old CanoScan LiDE 30. We are very satisfied with this scanner – but unfortunately it does not work on newer versions of Windows (e.g. Windows 7 64 bit, Windows 8) – Canon “forgot” to release updated drivers.

Raspberry Pi networked scanner sharing

A Raspberry Pi is perfect for a small, low volume server application. Today, we have put together all the pieces necessary to use it to attach the Canon scanner to our network, and scan from Windows once again.

BTW: It looks as though the Fujitsu ScanSnap 1300i might also be supported by SANE. This is the replacement scanner for the Canon flatbed scanner we bought – but it can’t scan books, for instance.

Step by step setup guide:

This guide is written for Raspbian. We have tested it with the latest Raspbian version currently available (2013-02-09).

Get the required packages:

sudo su
aptitude update
aptitude install xinetd sane-utils

xinetd is the Internet superdaemon which will start saned, the “Scanner Easy Access Now” daemon when a network connection to it’s port is opened (saned can’t do that on it’s own).

sane-utils contains the saned. (On Archlinux the package is called simply “sane”)

Raspbian automatically sets up the group saned and the user saned for you. It also adds the user saned to the group scanner.

Configure /etc/default/saned so it will start automatically (RUN=yes):

# Defaults for the saned initscript, from sane-utils

# Set to yes to start saned
RUN=yes

# Set to the user saned should run as
RUN_AS_USER=saned

Start saned, and test whether the scanner is recognized. Ideally you should do this as user saned, to see if all access rights for saned are setup correctly. Your scanner should naturally be attached to the Raspberry Pi. If it draws its power through USB, we recommend to use a powered USB hub.

root@raspberrypi:/home/pi# /etc/init.d/saned start

root@raspberrypi:/home/pi# su -s /bin/sh - saned
No directory, logging in with HOME=/

$ lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 008: ID 04a9:220e Canon, Inc. CanoScan N1240U/LiDE 30
Bus 001 Device 007: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 006: ID 046d:c31c Logitech, Inc. Keyboard K120 for Business

$ scanimage -L
device `plustek:libusb:001:008' is a Canon CanoScan N1240U/LiDE30 flatbed scanner

$ exit

root@raspberrypi:/home/pi#

I have included the # and $ prompt in this listing, so you can distinguish between commands the root user (#) issues and the saned user issues ($)

If you see your scanner here, great. If not – have a look at the documentation and further reading links we will provide at the end of this article.

The USB scanner itself is plug & play – you can attach it to the Raspberry Pi when you feel like scanning, and remove it after you have finished.

Prepare network sharing of the scanner

root@raspberrypi:/etc/xinetd.d# cat /etc/services | grep sane
sane-port       6566/tcp        sane saned      # SANE network scanner daemon

You should see the sane-port line as in the listing. If it is not in there, add it.

root@raspberrypi:/# cd /etc/xinetd.d

root@raspberrypi:/etc/xinetd.d# touch sane-daemon

root@raspberrypi:/etc/xinetd.d# which saned
/usr/sbin/saned

root@raspberrypi:/etc/xinetd.d# nano sane-daemon

This will set up the XInet configuration. Please use the following configuration for the /etc/xinetd.d/sane-daemon file:

service sane-port
            {
              socket_type = stream
              server = /usr/sbin/saned
              protocol = tcp
              user = saned
              group = saned
              wait = no
              disable = no
            }

Note that we used the output from “which saned” in the configuration above. If it is different for you – e.g. on Archlinux – adjust accordingly.

Set up saned to accept connections from your network by editing /etc/sane.d/saned.conf:

# saned.conf
# Configuration for the saned daemon

## Daemon options
# [...]
# data_portrange = 10000 - 10100


## Access list
# [...]
# The hostname matching is not case-sensitive.

#scan-client.somedomain.firm
192.168.1.0/24

#192.168.0.1
#192.168.0.1/29
#[2001:7a8:185e::42:12]
#[2001:7a8:185e::42:12]/64

# [...]

Please adjust the subnet specification 192.168.1.0/24 to your network architecture. You can also explicitly specify single IPs. If you do not edit this file, SaneTwain will hang when contacting your Raspberry Pi scanner server.

Now you can reboot the Raspberry Pi (sudo reboot), and continue to the set up on the Windows side.

Setting up Windows to access the SANE network scanner

We have tested with Windows 7 64 bit & Windows 8 64 bit.

Windows users use “TWAIN” drivers. Luckily, there is an application, which will create a bridge between TWAIN and SANE on the network. The author claims it does not work for 64 bit Windows, but it did work for us. Please report back in the comments about your success / failure stories on different Windows versions.

Download SaneTwain here.

SaneTwain Setup

image

Just enter your Raspberry Pi IP (if you do not know it, “ip addr show” will show you it’s network setup) as the hostname. Port and Username can stay the way they are. Look through the other settings, if you want to. The Mail tab, for instance, offers the possibility to set up an Evernote account you want to scan to.

Before you try to use the TWAIN driver SaneTwain offers, you should set up the hostname using the way we just described (by starting ScanImage.exe).

Scan

Now you’re set up for scanning. Use the “preview” button to acquire a preview, and the “scan” button to save the selected area to a PNG (it will be scanned with better quality, of course). The resolution can be set, also other options.

Wait until the scanner is finished with the preview and has repositioned itself, before you hit the “scan” button.

image

The TWAIN driver works for us, too. (Tested with IrfanView) – this is Windows 8 64 bit. No special tweaks were applied.

Setting up Linux to scan from the network scanner

If you have a Linux box, you can use basically any SANE Frontend to scan using the network.

You need to add the network scanner to a local SANE installation.

Edit /etc/sane.d/net.conf and add the IP of your server. You can specify multiple servers.

image

Test with scanimage –L once again, and after a while you will see your network scanner showing up.

Frontends

Try XSane. Noteworthy is also gscan2pdf which will convert scanned pages to multipage PDFs, and even OCR them for you!

Of course you should be able to scan from another Raspberry Pi on your network, or even the Internet.

simple-scan is a frontend for SANE.

Further Reading & Links

SANE

SaneTwain

How-Tos

We used the following how-tos in building this tutorial. Thanks, guys!

Optimization WordPress Plugins & Solutions by W3 EDGE