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by gridrun
Wed Nov 26, 2014 11:34 pm
Forum: Networking and servers
Topic: Proposal: RPI CM Supercomputer/HA Architecture
Replies: 5
Views: 1621

Re: Proposal: RPI CM Supercomputer/HA Architecture

If you want a cluster for sheer power, you're certainly NOT going to build it with Raspberry Pis. Agreed. For research and education, it would be great though. And, again, I could see practical use with low volume, HA services. The BCM SoC has very modest power requirements... However my focus was m...
by gridrun
Sun Nov 02, 2014 2:54 am
Forum: Networking and servers
Topic: Proposal: RPI CM Supercomputer/HA Architecture
Replies: 5
Views: 1621

Re: Proposal: RPI CM Supercomputer/HA Architecture

Oh, I was just thinking a cluster full of highly available, super-low-power LINUX servers. Existing software would be able to use this architecture. Each CM sees a GigE LAN interface on it's USB port, the FPGA provides standard Ethernet switching between CMs and the outside world. One such board bei...
by gridrun
Sun Nov 02, 2014 1:22 am
Forum: Networking and servers
Topic: Proposal: RPI CM Supercomputer/HA Architecture
Replies: 5
Views: 1621

Proposal: RPI CM Supercomputer/HA Architecture

I wish I could implement this:

Image

Maybe even a scaled down version limited to 4 CMs, with dual GigE instead of dual 10GigE.
by gridrun
Sun Nov 02, 2014 1:17 am
Forum: Media centres
Topic: NISTON Stream One
Replies: 5
Views: 1953

Re: NISTON Stream One

Yeah :) Thanks for the Tweet!

I was just asking because they should add some products to their portfolio:

- RCA Line in card
- S/PDIF in card
- S/PDIF out card
- AES/EBU in card
- AES/EBU out card

:D
by gridrun
Mon Oct 13, 2014 3:55 pm
Forum: Media centres
Topic: NISTON Stream One
Replies: 5
Views: 1953

Re: NISTON Stream One

Thanks Paul :)
It also sounds very very good! My compliments to the folks at IQaudIO!
Are you in some way affiliated with them?
by gridrun
Sat Oct 11, 2014 12:08 pm
Forum: Media centres
Topic: NISTON Stream One
Replies: 5
Views: 1953

NISTON Stream One

Hi all!

I'd like to present to you all my little embedded Raspberry Pi project:

Image

More info here: http://niston.wordpress.com/2014/10/10/ ... tream-one/
Firmware here: http://sirp.codeplex.com/
by gridrun
Tue Aug 19, 2014 6:24 am
Forum: Networking and servers
Topic: Redirecting Traffic on a Wifi Hotspot
Replies: 4
Views: 5341

Re: Redirecting Traffic on a Wifi Hotspot

Hosts file based redirection will only work if going through the local DNS resolver. You could use iptables on the raspberry pi, redirecting connections for certain IP:Port combos to wherever you like. The difficulty with this approach is, services like youtube might use way more than a single IP. F...
by gridrun
Sun Aug 17, 2014 1:09 pm
Forum: Off topic discussion
Topic: Eagle lbr for Gigabit Magjack
Replies: 0
Views: 669

Eagle lbr for Gigabit Magjack

I couldn't find any Eagle library for a GigE Magjack, so I've drawn one myself. Since this is the first lbr I ever made, maybe someone knowledgeable could take a look and see if I made some stupid mistakes? The lbr file can be found at http://www.file-upload.net/download-9389083/stewart-GigE-magjack...
by gridrun
Thu Mar 21, 2013 12:12 pm
Forum: Networking and servers
Topic: SNMP Monitoring Box
Replies: 7
Views: 21145

Re: SNMP Monitoring Box

djr357 wrote:Can you post your snmpd.conf?
I'm not currently using snmpd.conf. I resorted to PySNMP for sending SNMP traps. But good to hear that you got it working!
by gridrun
Sat Mar 16, 2013 5:11 pm
Forum: Off topic discussion
Topic: ReTINA - Realtime IP Network Audio/Video (DIY)
Replies: 0
Views: 1006

ReTINA - Realtime IP Network Audio/Video (DIY)

It's not raspberry related at all, but since it's pretty cool, I thought I'd share this anyways with you tinkering folks. Ever wanted to have a remote display for your computer? Even a remote network display? Investing a little money and time, you can build yourself Niston Cloud's ReTINA . Totally w...
by gridrun
Fri Mar 08, 2013 9:22 pm
Forum: Networking and servers
Topic: CPU load monitoring using GPIO and leds
Replies: 9
Views: 2532

Re: CPU load monitoring using GPIO and leds

Yeah! Blinkenlights! :D Reminds me of the BeBox, pretty cool.
by gridrun
Fri Mar 01, 2013 12:19 am
Forum: Networking and servers
Topic: My Network Sniffer
Replies: 8
Views: 25745

Re: My Network Sniffer

It's also a lot cheaper than any switch intelligent enough to do port mirroring. Hey, the little netgear I linked is actually dirt cheap :p But really, you can turn most any "dumb" switch into a hub, you just have to flood it with spoofed ARP replies. As soon as it's tables fill up (usually there's...
by gridrun
Tue Feb 26, 2013 6:03 pm
Forum: Troubleshooting
Topic: Watchdog rebooting w/o lock-up
Replies: 15
Views: 5671

Re: Watchdog rebooting w/o lock-up

Yeah, the problem actually dazzles me. What are the chances of ending up with a board that has broken silicon on it, and then it affects only a minor subsystem of the chip?

Nil, I'd say.

On the other hand: Without the watchdog, that particular board works fine.
by gridrun
Tue Feb 26, 2013 4:34 pm
Forum: General discussion
Topic: Cannot Connect to Port 10000 on LAN
Replies: 3
Views: 1716

Re: Cannot Connect to Port 10000 on LAN

Disable the "Use TLS 1.0" checkbox in Firefox settings (Options -> Advanced -> Encryption). That should fix it. Note that HTTPS will still be encrypted, just not by TLS 1.0.
by gridrun
Tue Feb 26, 2013 3:53 pm
Forum: Networking and servers
Topic: UDP to TCP converter
Replies: 10
Views: 5991

Re: UDP to TCP converter

You could even use http://de.wikipedia.org/wiki/Netcat to do this.
by gridrun
Tue Feb 26, 2013 3:52 pm
Forum: Networking and servers
Topic: UDP to TCP converter
Replies: 10
Views: 5991

Re: UDP to TCP converter

Just use a buffer (memory area). Read UDP datagrams coming in, store them to the buffer as they arrive. Periodically send the contents of the buffer via TCP. There should be no need for an additional Ethernet interface (unless the networks need to be physically separated from each other, perhaps due...
by gridrun
Tue Feb 26, 2013 10:21 am
Forum: Troubleshooting
Topic: Watchdog rebooting w/o lock-up
Replies: 15
Views: 5671

Re: Watchdog rebooting w/o lock-up

I think the interval 10s is too big, when timeout is only 15s. It may happen, that the busy raspberry misses one or two writes to hw watchdog and then you'll get a restart. Better would be interval of 2-3s, I'm using 2s now with heartbeat=15. It's a shame the hardware doesn't support higher timeout...
by gridrun
Mon Feb 25, 2013 10:24 pm
Forum: General discussion
Topic: Good non-usb Power Supply for Pi
Replies: 7
Views: 2177

Re: Good non-usb Power Supply for Pi

Well, I guess it's not a "consumer" style power supply. You'd have to build this one into a case, as it would be dangerous to operate it without, as you properly pointed out. Furthermore, those 25 Watts would be quite teh overkill if you just were to run your Pi from it. Although, your 5V rail would...
by gridrun
Mon Feb 25, 2013 7:17 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI driver latency and a possible solution
Replies: 242
Views: 140111

Re: SPI driver latency and a possible solution

Thank you msperl, for this ingenious contribution of yours!
Keep up the good work! 8-)
by gridrun
Mon Feb 25, 2013 6:58 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Digital POT Driving a LED with SPI
Replies: 4
Views: 2615

Re: Digital POT Driving a LED with SPI

Interesting :)

I thought of using a digital Pot before, to control a cheap household dimmer for 230VAC lamps.
by gridrun
Mon Feb 25, 2013 6:26 pm
Forum: Troubleshooting
Topic: Watchdog rebooting w/o lock-up
Replies: 15
Views: 5671

Re: Watchdog rebooting w/o lock-up

RaTTuS wrote:what are you watching for ?
I built a monitoring probe around a Pi and a PiFace digital board (see http://niston.wordpress.com/2013/02/24/ ... ring-probe for details). Since this sort of device is supposed to be always up, I figured why not make use of the watchdog.
by gridrun
Mon Feb 25, 2013 6:22 pm
Forum: General discussion
Topic: Good non-usb Power Supply for Pi
Replies: 7
Views: 2177

Re: Good non-usb Power Supply for Pi

RaTTuS wrote:how much ?
I paid around CHF 30 (~ GBP 22) via velleman.
by gridrun
Mon Feb 25, 2013 4:13 pm
Forum: Troubleshooting
Topic: Watchdog rebooting w/o lock-up
Replies: 15
Views: 5671

Re: Watchdog rebooting w/o lock-up

I'm not using the watchdog package anymore, so I don't have the /etc/watchdog.conf. Consequently, nothing concerning the watchdog daemon can be found in /var/log/daemon.log either. However when I did use the watchdog package, I also had to set nowayout=1. The watchdog daemon left these messages in /...
by gridrun
Mon Feb 25, 2013 3:59 pm
Forum: General discussion
Topic: Good non-usb Power Supply for Pi
Replies: 7
Views: 2177

Re: Good non-usb Power Supply for Pi

Well, it's a lot smaller than a std ATX power supply :D
by gridrun
Mon Feb 25, 2013 3:38 pm
Forum: Troubleshooting
Topic: Watchdog rebooting w/o lock-up
Replies: 15
Views: 5671

Re: Watchdog rebooting w/o lock-up

Time will tell if it the spontaneous rebooting persists- Unfortunately, yes. Even though I'm writing the string "bone" to /dev/watchdog every 3 seconds, I get spontaneous reboots every now and then (time to reboot is varying, but its always much more than the wd's 15s interval). Unless I disable th...

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