====== Netzwerkscanner am Raspberry Pi: ======

https://www.raspberrypi.org/forums/viewtopic.php?f=36&t=109169
http://support.epson.net/linux/src/scanner/iscan/

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Scanning Server for Epson L350 Series Printer/Scanner

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7 posts
by Alexey » Sat May 02, 2015 10:11 am
The L351 Epson All-in-one printer/scanner device was a huge pain in the ass to configure, but after a few days I've managed to figure it out. The printer part is actually really easy so I'm not going to cover it in this guide, you can find other guides for this. I will be devoting this guide to configuring the Raspberry Pi running Raspbian to work as a scanner server on for this particular device for a Windows client assuming it is already configured to work as a printer server (i.e. CUPS has been installed and configured). Due to the nature of this device being a combo there are special steps to be taken in order to achieve the desired effect.

Lets get SANE (the scanner operator for linux) and an internet superdaemon:

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	$ sudo apt-get install xinetd sane-utils



Now we configure SANE to run automatically:

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	$ sudo nano /etc/default/saned



Edit it to look like this:

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	# 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:

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	$ sudo /etc/init.d/saned start



Let's see if our scanner is listed:

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	$ 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 006: ID 04b8:08a1 Seiko Epson Corp.
	Bus 001 Device 005: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]


In my case, it's listed as "Bus 001 Device 006: ID 04b8:08a1 Seiko Epson Corp.". Now let's try activating the scanner:

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	$ scanimage -L



If your output was:

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	No scanners were identified. If you were expecting something different,
	check that the scanner is plugged in, turned on and detected by the
	sane-find-scanner tool (if appropriate). Please read the documentation
	which came with this software (README, FAQ, manpages).



Then you have the same problem as I had, so keep following the guide. If your output is different, and you actually see a device ID and scanner name after that, then your scanner is already configured (perhaps by the time you read this SANE will include the Epson drivers and will detect automaticaly)

Let's first prepare our network sharing of the scanner for our Windows client:

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	$ sudo cat /etc/services | grep sane
	sane-port       6566/tcp        sane saned      # SANE network scanner daemon



You should see the sane-port line. If you don't - add it.

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	$ cd /etc/xinetd.d
	$ sudo touch sane-daemon
	$ which saned
	/usr/sbin/saned
	$ sudo nane sane-daemon



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

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	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:

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	 $ sudo nano /etc/sane.d/saned.conf



To look like this:

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	# 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 (in my case I just added 192.168.0.20, which is the IP of my main PC). 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).

Installing the Epson scanner drivers:

The first thing we need to do is to compile the Epson iscan drivers. They are available for download from the Epson driver portal (http://download.ebz.epson.net/dsc/searc ... ch/?OSC=LX)

You need the iscan and iscan-data .tar.gz files. The packages available there are for other architectures, and will not work on the Raspberry Pi, that's why we are forced to download the sources and compile for ourselves:

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	$ cd ~
	$ wget http://support.epson.net/linux/src/scanner/iscan/[[iscan_2.30.1-1.tar.gz]]
	$ wget http://support.epson.net/linux/src/scanner/iscan/[[/iscan-data_1.36.0-1.tar.gz]]



Note: the wget link may be different for you if the version of the driver ever changes. Refer to the epson driver portal

Before we get to compiling, let's install all the dependencies:

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	$ sudo apt-get install xsltproc libgtk2.0-dev libxml2-dev libsane-dev libltdl-devmake




Great, now let's get to compiling, we compile the iscan-data first:

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	$ cd iscan-data-1.36.0
	$ sudo ./configure
	$ sudo make
	$ sudo make install



Hopefully, no errors come up. Keep an eye out, there may be some dependencies missing, in which case you should manually install them. Now, we do the same thing with iscan:

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	$ cd ..
	$ cd iscan-2.30.1
	$ sudo ./configure
	$ sudo make
	$ sudo make install



We'll make a dir for sane's drivers and transfer some driver files there just for good measure (WARNING: I'M USING RASPBERRY PI MODEL B, THE /lib/arm* FOLDER NAME MAY BE DIFFERENT FOR YOU DEPENDING ON YOUR PI, TO MAKE SURE JUST DO ls /lib/ | grep arm AND YOU WILL SEE THE PROPER FOLDER NAME)

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	$ sudo mkdir /lib/arm-linux-gnueabihf/sane
	$ sudo cp /usr/local/lib/sane/libsane-epkowa* /lib/arm-linux-gnueabihf/sane/
	$ sudo cp /home/pi/iscan-data-1.36.0/epkowa.desc /lib/arm-linux-gnueabihf/sane/



Now let's make sure SANE only loads the Epson drivers so as to not overload the system more than we need to:

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	$ sudo nano /etc/sane.d/dll.conf



Starting from "net", you need to comment out (add a # to the beginning of each line) all the lines except epson2. DO NOT COMMENT OUT epson2.

Now we must add the device ID to the SANE epson2 config:

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	$ sudo nano /etc/sane.d/epson2.conf



After the "usb" line, add the following line:

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	usb 0x4b8 0x8a1




Where the "4b8" and "8a1" are simply the last three characters of both parts of the device ID of the scanner/printer, which we found out when we did the lsusb command at the beginning of the guide (Bus 001 Device 006: ID 04b8:08a1 Seiko Epson Corp). It might be different in your case, so make sure to check it.

Accounting for the permission problems due to the printer/scanner conflict:

First, we add user saned to the lp group:

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	$ sudo adduser saned lp



Lastly, we create a custom rule for udev to grant special permissions:

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	$ sudo nano /etc/udev/rules.d/99-custom.rules



Add the following line:

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	ATTR{idVendor}=="04b8", ATTR{idProduct}=="08a1", MODE="0666", GROUP="lp"



NOTE: the idVendor and idProduct attribute values may be different for you. Once again, refer to the device ID we get from the lsusb command. Pay attention, the format here is different from the epson2.conf file.

That's it! Reboot the pi!

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	$ sudo reboot



Let's see if it works, running the scanimage -L command you should have the following or similar output:

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	$ scanimage -L
	device `epson2:libusb:001:004' is a Epson PID 08A1 flatbed scanner