Archive for the ‘Raspberry Pi’ Category.

Configuring the Samba server on the Bananapi

This entry is part 4 of 4 in the series Raspberry Cluster

Configuring the samba server and having it use the attached 2,5″ HDD was actually pretty easy.

Step 1: Mounting the harddisk

From http://mein.homelinux.com/wiki/linux/mounten I learnt how to add the attached harddisk to the fstab. blkid gave me the UUID of the disk (which I had previously partioned and formated with gparted), so I just had to a) create a directory /media/storage, b) set the access rights with chmod 777 /media/storage and add the following line to the fstab:

UUID=b06c9eb6-7cc3-429b-9176-44896e712319 /media/storage ext4 auto,defaults 0 2

Step 2: Installing samba

sudo apt-get install samba installed samba, but not smbpasswd. A quick sudo apt-get install samba-common-bin fixed this.

After I had created a „bananapi“ user on the machine I added this account to the list of samba users with the command smbpasswd -a bananapi. I then took the sample configuration for the /etc/samba/smb.conf from https://www.thomas-krenn.com/de/wiki/Einfache_Samba_Freigabe_unter_Debian and rebooted the machine.

From my Windows machine I can connect now to \\bananapiip\public and use it as a samba server. When copying a 1 GB iso image to the \public share I got an avaerage of 35 MB per second.

Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

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Setting up the cluster

This entry is part 3 of 4 in the series Raspberry Cluster

Since the case is pretty much complete now, it is time to take a look at the software. I finally decided to run Raspian on the PIs and Lubuntu on the Banana Pi. While there may be other (maybe even more suitable) OSes available I think is the best starting point for my project. The Banana Pi is equipped with Lubuntu.

After booting the Banana Pi I switched to the German keyboard layout (unfortunately the corresponding GUI is horrible). Afterwards the usual apt-get update and apt-get upgrade took care of software updates.

The next steps are the configuration of a static IP as well as the installation of the SSH demon and samba.

Banana Pi updating

EDIT

I just learnt about Bananian which is based on Debian 7. It does not provide a desktop environment, so a 2 GB SD card is said to be sufficient. Since I just want the Bananapi to act as samba server all the Lubuntu features are pretty irrelevant for me.

It also has a sshd running

Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

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Building a case for the Raspberry 2 cluster

This entry is part 2 of 4 in the series Raspberry Cluster

Just putting 6 microcontrollers on the table won’t work long (low WAF) so I decided to use the vast amount of my Lego Technic components to build a suitable case. In the future I might switch to a custom-made Acryl case (I could use the Dingfabrik’s laser cutter) but for quick prototyping nothing beats LEGO. For this project I had to buy a few extra components, among them two dozen LEGO 55615 which drove the costs a little.

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Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

More Posts - Website

Building a Raspberry Pi 2cluster

This entry is part 1 of 4 in the series Raspberry Cluster

Big Data, Hadoop, NumPy, R cluster computing etc. are pretty hot topics. To get my hands on them and get a deeper understanding I have decided to build my own cluster out of small Raspberry Pi 2 computers. I am not the first one to come up with this idea, you can find a few nice examples online.

I have decided to use five Raspberry Pi 2 and one Banana Pi in this cluster. The Banana Pi has the advantage of being equipped with a Serial ATA port, my plan is to use it to store the data the Raspberries are working on.

The general setup is the following:

  1. 5 x Raspberry Pi 2 from Pollin for 37.95 Euro each
  2. A TP-Link 8-Port Gigabit Switch for 20.99 Euro
  3. a 6-Port RAVpower USB power source (3 x 1.0 Amp, 3 x 2.4 Amp) for 17.99 Euro
  4. a couple of five micro USB cables for 12.99 Euro
  5. Identical 16 GB micro-SD cards from Sandisk, Class 10 for 10.99 each
  6. the Banana Pi (I got mine from notebooksbilliger.de for 33.89 Euro)
  7. a SATA Power/Data cable to connect a 2.5″ harddisk to the Banana Pi

So altogether I spent around 320 for the electronic parts, some other parts (like SD card and USB cable for the Banana Pi) I had in my stash.

In the next article of this series I’ll describe the case I am currently building out of Lego Technics parts…

Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

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Printing from iOS via Raspberry Pi

Today I successfully managed to configure my Rapsberry Pi in such way, that I can print on my HP LaserJet 4100 from my iOS devices. I followed the instructions from http://rohankapoor.com/2012/06/configuring-the-raspberry-pi-as-an-airprint-server/. Be aware that for iOS 6 some adjustments need to be made, see the end of the instructions.

Besides the configuration instructions on the above mentioned page I had to enable the IPv6 privacy extensions, since cups gave me the following errors in /var/log/cups/error_log:


E [05/Jan/2013:19:23:40 +0100] Unable to open listen socket for address [v1.::1]
:631 - Address family not supported by protocol.
E [05/Jan/2013:19:24:57 +0100] Avahi client failed, closing client to allow a cl
ean restart
E [05/Jan/2013:19:26:24 +0100] Unable to open listen socket for address [v1.::1]
:631 - Address family not supported by protocol.

To configure these extensions I added the following lines to /etc/sysctl.conf:


net.ipv6.conf.default.use_tempaddr=2
net.ipv6.conf.eth0.use_tempaddr = 2

The last step was then to change the IP address to static (should not be necessary, since iOS should be able to find the printserver anyway, but one never knows…) following the instructions from http://www.penguintutor.com/blog/viewblog.php?blog=6306

German summary: Um mit meinem alten HP Laserjet 4100 vom iPad drucken zu können, habe ich einen Raspberry Pi nach einer Anleitung im Internet konfiguriert.

Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

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Artikel zum Raspberry Pi bei SPON

Spiegel online hat einen recht umfangreichen Artikel zum Raspberry Pi veröffentlicht: http://www.spiegel.de/netzwelt/web/raspberry-pi-die-besten-projekte-fuer-den-46-euro-pc-a-874993.html

Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

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Acrylbox und GPIO-Breakout für den Raspberry Pi

Heute kam meine Acryl-Box (http://adafruit.com/products/859) sowie das GPIO-Breakout Kit (http://adafruit.com/products/914) für meinen Raspberry an. Die Lieferung aus den USA hat ca. 12 Tage gedauert, ich hatte die preiswerteste Liefermethode gewählt.

Die Passform der Acryl-Box ist wie zu erwarten sehr gut, in den nächsten Tagen liefere ich mal ein Foto nach.

Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

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Android 4 für den Raspberry kommt

Wie die Raspberry Foundation meldet, kommt Android 4 offiziell für den Raspberry Pi. Bis zum offiziellen Release kann man sich ja mal Razdroid anschauen.

Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

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Stackexchange Forum für den Raspberry Pi

Für LaTeX ist ja tex.stackexchange.com das meiner Ansicht nach beste Forum, um selbst auf kniffelige TeX-Fragen eine schnelle und gute Antwort zu erhalten. Für den Raspberry gibt es jetzt ebenfalls ein Forum bei Stackexchange:
http://raspberrypi.stackexchange.com

Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

More Posts - Website

Raspberry Pi unter Windows emulieren

Unter http://sourceforge.net/projects/rpiqemuwindows/ gibt es ein fertiges Emulator-Paket für den Raspberry Pi. Einfach entpacken und die run.bat ausführen. Läuft bei mir unter Windows 7 64-Bit sehr gut.

Uwe

Uwe Ziegenhagen has been working with LaTeX for more than a decade. Besides TeX/LaTeX he likes to work with Python, Rasberry/Arduino and his digital camera.

More Posts - Website