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by drscheme
Sat Jun 14, 2014 2:00 pm
Forum: Automation, sensing and robotics
Topic: USB thermometer "stuck" after some while (Microdia TEMPer)
Replies: 0
Views: 1397

USB thermometer "stuck" after some while (Microdia TEMPer)

I have a problem with an USB thermometer I recently bought from Amazon (http://www.amazon.de/USB-Sensor-Thermograph-Thermometer-Temperatur/dp/B009RETJIO). After some hours the thermometer "gets stuck" and outputs the same value 29.5°C. When there is a "clear" change in temperature, let's say you tou...
by drscheme
Tue Nov 19, 2013 9:12 pm
Forum: Networking and servers
Topic: Network interface does not always work after reboot
Replies: 1
Views: 322

Network interface does not always work after reboot

Hi, I have a Pi with the latest Raspbian running in my home network. Attached are a USB Harddrive and a USB Thumbdrive. When I reboot the device it is not available via the network in about 50%. I have the odd feeling that this problem won't appear when the usb devices are not plugged into the Pi wh...
by drscheme
Thu May 30, 2013 2:15 pm
Forum: General discussion
Topic: Are there any advanced NAS systems for raspberry?
Replies: 5
Views: 1379

Re: Are there any advanced NAS systems for raspberry?

NAS systems are basically embedded devices with customized linux distributions and a nice gui. If you tell us which function you need we can recommend individual packages to install on the Raspbi.
by drscheme
Thu May 30, 2013 9:50 am
Forum: Networking and servers
Topic: Samba file shares on Raspbi + Mac Finder
Replies: 1
Views: 961

Samba file shares on Raspbi + Mac Finder

Hi, I set up a Samba server on my Raspbi. I have Mac machines, a windows machine and another Raspbi with Raspbmc that receives media via Samba. Samba on the Mac works slower than on my other machines, meaning when I open a folder with lots of stuff in it it takes ages until Finder shows the files. S...
by drscheme
Sat Apr 27, 2013 11:20 am
Forum: Networking and servers
Topic: Network connection doesn't work after reboots now and then
Replies: 3
Views: 639

Network connection doesn't work after reboots now and then

Hi, as the thread subject says my pi's network connection doesn't work after reboots occasionally. I can see the network card, it seems to be up but isn't. Restarting the network won't help. No, I didn't mess with the networking settings, which are auto lo iface lo inet loopback auto eth0 iface eth0...
by drscheme
Sat Mar 09, 2013 1:47 pm
Forum: Troubleshooting
Topic: Prevent SD-Card Corruption
Replies: 229
Views: 168896

Re: Prevent SD-Card Corruption

I think sd corruption is rare. I have only seen those when playing with extreme overclocking. (more than 1000 mhz). After the raspberry is working stable, there should noit be corruptions. I'd be happy if this would be rare. Mine is not overclocked, I use a SD-Card that is on the list of supported ...
by drscheme
Sat Mar 09, 2013 1:25 pm
Forum: Troubleshooting
Topic: Prevent SD-Card Corruption
Replies: 229
Views: 168896

Prevent SD-Card Corruption

It seems that all people have the same problem: the pesky SD-Card corruption. I read lots about backing up or restoring the card and also trying to fix the card. But I didn't find a thread that describes what we can do to PREVENT SD-Card corruption. I'm sure there must be some "fancy" tweeks that he...
by drscheme
Sat Mar 09, 2013 1:08 pm
Forum: Troubleshooting
Topic: fsck sd-card fails "file system is read only"
Replies: 3
Views: 3806

Re: fsck sd-card fails "file system is read only"

Have you tried running fsck on the Pi itself? The easiest way is to add "forcefsck" to /boot/cmdline.txt and then reboot. (The cmdline.txt file should be all on one line.) Thanks, I'll try to do that. Can you remove the SD card and verify it on another system? A 'Live CD' would give you access to a...
by drscheme
Fri Mar 08, 2013 4:31 pm
Forum: Troubleshooting
Topic: fsck sd-card fails "file system is read only"
Replies: 3
Views: 3806

fsck sd-card fails "file system is read only"

The file system in my Pi is broken (again). I wanted to try to fix it with fsck on another Linux box but surprisingly the machine tells me that the sd-card is read-only. The little switch on the card is of cause not on the lock position... I tried to resolve the problem and googled a while but could...
by drscheme
Sat Mar 02, 2013 4:39 pm
Forum: Automation, sensing and robotics
Topic: Problem with DS18B20 sensor
Replies: 15
Views: 9122

Re: Problem with DS18B20 sensor

Are there actually other One-Wire sensors that are supported by Linux? E.g. a humidity sensor, etc?
by drscheme
Tue Feb 26, 2013 9:35 pm
Forum: Networking and servers
Topic: OpenVPN with TAP device and external DHCP server
Replies: 1
Views: 2296

Re: OpenVPN with TAP device and external DHCP server

Okay I found the solution. If you use an external DHCP the directive "ifconfig-pool-persist ipp.txt" is not useful and breaks the configuration.

But my second question about broadcasting magic packets still is onsolved =)
by drscheme
Tue Feb 26, 2013 9:24 pm
Forum: Networking and servers
Topic: OpenVPN with TAP device and external DHCP server
Replies: 1
Views: 2296

OpenVPN with TAP device and external DHCP server

Hi everyone, first a quick description what I want to do: My Raspberry Pi should act as OpenVPN Gateway to my network 192.168.178.0. In this network I have a WLAN/LAN Router 192.168.178.1 with a DHCP server. The OpenVPN clients that connect to my network should get their IP address from the mentione...
by drscheme
Fri Feb 22, 2013 2:50 pm
Forum: Automation, sensing and robotics
Topic: Problem with DS18B20 sensor
Replies: 15
Views: 9122

Re: Problem with DS18B20 sensor

Hi Hi Schnoog, Can I check how you have connected the circuit? It should be: 3.3v from Pi----.----VCC | '----4k7 Resistor----Data---GPIO4 (3rd pin down from 3.3v) Ground on Pi----Ground on DS18B20 I am a little confused. I found another diagram on a website (http://www.cl.cam.ac.uk/freshers/raspberr...
by drscheme
Fri Feb 15, 2013 12:35 pm
Forum: General discussion
Topic: RS: no shipping, no response to mail, Paypal complaint works
Replies: 0
Views: 434

RS: no shipping, no response to mail, Paypal complaint works

If you've got trouble with RS (as many here in the forum seem to have) I strongly recommend to send them a complaint via PayPal. I ordered my Pi four or five weeks ago and cancelled the order one or two weeks ago as I ordered another Pi at Farnell in the meantime. By the way: Farnell delivered in TH...
by drscheme
Thu Feb 14, 2013 12:17 pm
Forum: Troubleshooting
Topic: cannot execute binary file
Replies: 17
Views: 7586

Re: cannot execute binary file

I "only" run the device at 800MHz. Now I totally switched off overclocking.

But meanwhile I assume it's the power supply. Most probably the power plug is not sufficient to additionally power a WLAN USB Stick directly plugged into the RPi...
by drscheme
Thu Feb 14, 2013 11:11 am
Forum: Deutsch
Topic: Abstürze - verwendetes USB Kabel?
Replies: 8
Views: 1154

Re: Abstürze - verwendetes USB Kabel?

Hast du den WLAN-Stick an einem USB-Hub mit eigener Stromversorgung? Wenn nein, dann mach das, sonst wird der RPi nie stabil funktionieren. Ist der Grund der USB-Hub oder zu geringe Stromversorgung? Ich habe meinen WLAN-Stick am RPi direkt angeschlossen und habe mittlerweile auch den Eindruck, dass...
by drscheme
Thu Feb 14, 2013 11:07 am
Forum: General discussion
Topic: NEVER received my R.PI
Replies: 8
Views: 1713

Re: NEVER received my R.PI

Same here, I ordered a Pi three weeks ago but neither got the Pi nor did RS respond to any of my mails / order cancellations. Money is gone so far. Today I tried to contact them via Paypal... PS: Farnell delivered in 3 days... I highly recommend not to order at RS. It's only a pity that Raspberry Pi...
by drscheme
Thu Feb 14, 2013 10:54 am
Forum: Troubleshooting
Topic: cannot execute binary file
Replies: 17
Views: 7586

Re: cannot execute binary file

Yes, I had to. But where does this come from?
by drscheme
Thu Feb 14, 2013 8:51 am
Forum: Troubleshooting
Topic: cannot execute binary file
Replies: 17
Views: 7586

Re: cannot execute binary file

Update:

As the "reboot" command did not work anymore I had to reboot the Pi by pulling the power plug. Now it doesn't boot anymore. The last lines on the boot screen are:

PANIC: VFS: Unable to mount root fs on unknown-block

Entering kdb (current= ...) due to Keyboard Entry
kdb> _

Any suggestions?
by drscheme
Thu Feb 14, 2013 8:42 am
Forum: Troubleshooting
Topic: cannot execute binary file
Replies: 17
Views: 7586

cannot execute binary file

Hi, I repeatedly run into some strange problem with my new Pi. After rebooting the machine I get the following error message when I run commands in the shell, e.g.: xx@raspberrypi ~ $ clear -bash: /usr/bin/clear: cannot execute binary file xx@raspberrypi ~ $ sudo reboot [sudo] password for xx: sudo:...

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