Tag: raspberry

– How to add WiFi to a multifunction printer using Raspberry Pi –

PART 4: INSTALL SCANNER SERVER

In the previous part we configured the IP address of the Raspberry Pi. In this article, instructions are given to install scanner server software SANE. Configuration makes it accessible from the local network.

23) Install internet daemon xinetd

sudo apt-get install xinetd

As a result, your has the better intenet daemon, which makes managing sevices provided via sockets easier.

24) Install Scanner server software SANE… with some utilities

sudo apt-get install sane-utils

The package contains sane utilities including saned SANE daemon.

25) Installing scanner server requires to add / edit new udev rule for scanner, to enable access:

sudo nano /etc/udev/rules.d/65-libsane.rulesprinter

contents of the new rule line:

ACTION==”add”, ENV{DEVTYPE}==”usb_device”, ENV{libsane_matched}==”yes”, RUN+=”/bin/setfacl -m g:scanner:rw $env{DEVNAME}”

26) find path of saned

which saned

Presuming, it is /usr/sbin/saned , as it shoud be with Raspbian Buster Lite

27) Check that saned is added to services

sudo cat /etc/services | grep sane

EXPECTED OUTPUT:

sane-port 6566/tcp sane saned  # SANE network scanner daemon

28) Add saned to xinetd config, so internet daemon will listen and provide sane-daemon service:

sudo nano /etc/xinetd.d/sane-daemon

Add/Edit contents to:

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

29) Edit sane daemon config, adding your current wlan subnet as permitted.

sudo nano /etc/sane.d/saned.conf 
# Leaving only uncommented line as
192.168.1.0/24

30) Add user lp to saned group 

sudo adduser saned lp

31) Enable saned socket to receive and send

sudo systemctl enable saned.socket
32) Check saned socket status

sudo systemctl status saned.socket

33) Get free client software: SwingSane

I recommend SwingSane. It is quite functional. Eve so, on Windows the custom scanning settings had to be used always to get good scanning results.

Install SwingSane to a client computer. Then, configure it by adding new scanner by IP address. In this point, you can give it any name you want. The Remote Address is the address of the Raspberry Pi, and the SANE port number is 6566. 

34) Do a test scan

As a result, of the installs and configuration, you should have now a printer – scanner with a WiFi connection, that can be reached over the wireless local area network.

I didn’t make this all up by myself. Some partial instructions were helpful. Therefore, I give them credit and backlinks:

• https://circuitdigest.com/microcontroller-projects/raspberry-pi-print-server
• https://samhobbs.co.uk/2014/07/raspberry-pi-print-scanner-server
• http://www.johndstech.com/2016/how-to/geek-friday-setting-up-epson-scanning-on-raspberry-pi/

PART 3: SET FIXED IP ADDRESS

In the previous part, we configured the printer server, now we may want to set a fixed IP address, which makes configuring the scanner software easier, and also facilitates printer search too. The IP address range used by router’s DHCP should not be used for fixed addresses, but you may be able to set a fixed DHCP address for the raspberry in the router’s config, so that the DHCP always gives the same address to the device (which it reconginzes in WLAN by its MAC address).

21) Plan the place of the Raspberry Pi in your Local Area Network

Let’s think about configuring your RPi to have a fixed IP address in the WLAN. You can either program your WLAN router to always give the same IP address to the RPi:s WLAN adapter, or select an address within the subnet and out of the DHCP range in use. In this writing, we take the latter route, i.e. setting the IP address out of the DHCP range; assuming that DHCP is giving addresses starting from 192.168.1.10 and ending to 192.168.1.200, we pick an address in range 201-254, say, 192.168.1.245. This depends of course of your subnet configuration. If you have router management IP in 192.168.1.1 and the IP V4 net mask is 255.255.255.0, and you have nothing in your net with IP address 192.168.1.245, you’re good to go with my settings.

22) Configure the IP V4 address via DHCP

Configure the dhcp daemon to make the IP address a static one; consult iwconfig to get the name of your connected wlan interface. In the system configuration step, raspi-config , section Network – 2, you should have  set “Enable Predictable names” to get wlan0 instead of something like wlx01234678ABCD. Now, edit dhcp configuration file:

sudo nano /etc/dhcpcd.conf

#Add to beginning:

nohook lookup-hostname
interface wlan0 # wlan0 is the typical name for the wireless lan (wifi) interface, but it may be also longer
static ip_address=192.168.1.245/24
static routers=192.168.1.1
static domain_name_servers=1.1.1.1 # of whichever DNS you want, for example, 192.168.1.1, 8.8.8.8 will also do.

Save and then restart DHCPD, or just reboot.

Now we have set fixed IP address for the Raspberry Pi. Please note that if you configured the printer in the PC using IP address, you may want to reconfigure the address now.

In the next part we will configure the scanner server.