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by gordonendersby
Tue Feb 12, 2013 10:37 pm
Forum: Networking and servers
Topic: lighttpd and generating graphs on the fly
Replies: 1
Views: 773

lighttpd and generating graphs on the fly

Hi all, Ive got a raspi gathering weather data. Temp, pressure, humidity and storing the data in mysql and using lighttpd to show the results in a few web pages with graphs. At the moment im using GDGraph perl modules ( http://gdgraph.com/ ). But its not very quick and theres a very visible delay wh...
by gordonendersby
Fri Jan 18, 2013 6:38 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Raspbian for x86 = Debian?!
Replies: 7
Views: 8235

Re: Raspbian for x86?

Raspbian is just debian linux compiled for Arm for the raspberry pi.
Just run a basic debian linux distribution in virtualbox and install the packages you need from the debian repositories.

Gordon
by gordonendersby
Mon Oct 22, 2012 9:16 pm
Forum: Advanced users
Topic: USB packet loss fix on github
Replies: 2
Views: 2275

USB packet loss fix on github

In this post on github: https://github.com/raspberrypi/firmware/issues/19 about usb packet loss. One of the "fixes" is to add the following to cmdline.txt sdhci-bcm2708.missing_status=0 sdhci-bcm2708.sync_after_dma=0 Could someone tell me what this does and if it might help with the problem Ive got ...
by gordonendersby
Mon Oct 22, 2012 8:51 pm
Forum: Troubleshooting
Topic: latest raspbian locking up with usb problems
Replies: 3
Views: 729

Re: latest raspbian locking up with usb problems

rmistero yes ive read that. But its not a power problem.. honest.... But as Ive said in my previous post the only change has been moving to the latest wheezy. The older version was stable with my arduino and wifi adapter and would stay up for more than a week. Dont know if it would last longer as Im...
by gordonendersby
Mon Oct 22, 2012 9:13 am
Forum: Other programming languages
Topic: How to install perl?
Replies: 3
Views: 11908

Re: How to install perl?

At the command prompt type:
perl -v
followed by return.

If perl is installed it will report the version.
But so far I havnt found a version of linux where its not installed as perl seems to hold quite a lot of the system together in the background.

Gordon (a different one)
by gordonendersby
Sat Oct 20, 2012 10:55 am
Forum: Troubleshooting
Topic: latest raspbian locking up with usb problems
Replies: 3
Views: 729

latest raspbian locking up with usb problems

Hi all, I have this problem with the latest wheezy as stated in my post in the raspbian section of the forum. USB is breaking after leaving the raspbian running for any length of time. http://www.raspberrypi.org/phpBB3/viewtopic.php?f=66&t=20163 But apart from others having the same problem I seem t...
by gordonendersby
Sat Oct 20, 2012 10:40 am
Forum: Raspbian
Topic: Wheezy 2012-9-18 locking up usb and networking
Replies: 10
Views: 3720

Re: Wheezy 2012-9-18 locking up usb and networking

Nope, not solved, went down just after 11.00pm last night. Same problem. It lost usb so wireless stopped working and couldnt pick any data up from the arduino. This was headless with just the wireless adapter and Arduino. The arduino has just 3 very low power devices attached. 2 DHT22 temp/humidity ...
by gordonendersby
Fri Oct 19, 2012 5:32 pm
Forum: HATs and other add-ons
Topic: Gertboard parts list
Replies: 10
Views: 5043

Re: Gertboard parts list

Thanks for that.
Ive just saved a copy with my build instructions ready to start soldering.

Gordon
by gordonendersby
Fri Oct 19, 2012 5:25 pm
Forum: Networking and servers
Topic: is Realtek RTL8188SU wifi donglesupported by any damn way !
Replies: 3
Views: 8245

Re: is Realtek RTL8188SU wifi donglesupported by any damn w

I think my card is practically the same, it worked out of the box on the latest raspbian wheezy. Its one of those wireless cards that are barely bigger than the usb plug. I did use the wpa gui from the desktop to set the ssid and password. But now using it headless after the initial start up. It has...
by gordonendersby
Thu Oct 18, 2012 6:51 pm
Forum: Raspbian
Topic: Wheezy 2012-9-18 locking up usb and networking
Replies: 10
Views: 3720

Re: Wheezy 2012-9-18 locking up usb and networking

Well its Thursday now and the raspi has been on all the time. Mysql, lighttpd and perl scrips running all ok. No lock ups or errors since I removed the usb hub, keyboard and mouse. pi@raspberrypi ~ $ uptime 19:49:04 up 2 days, 7:36, 2 users, load average: 0.02, 0.12, 0.13 Could be a problem for othe...
by gordonendersby
Wed Oct 17, 2012 5:31 pm
Forum: General discussion
Topic: Short USB cables
Replies: 6
Views: 1490

Re: Short USB cables

Ebay?
http://www.ebay.co.uk/itm/New-Short-USB ... 27c0e39567

12cm rather than 10cm but close enough?

Gordon
by gordonendersby
Wed Oct 17, 2012 2:46 pm
Forum: Advanced users
Topic: Filesystem for Pi that could be powerless at any second
Replies: 11
Views: 5808

Re: Filesystem for Pi that could be powerless at any second

I wish I could remember the name of it but isnt there a file system or technique that lays a file system in memory over the top of a read only file system.

That way the underlying read only file system cant be corrupted and all you loose is the changes in ram sitting over the top.

Gordon
by gordonendersby
Wed Oct 17, 2012 2:18 pm
Forum: General discussion
Topic: Pile of gert parts arrived this morning
Replies: 6
Views: 1098

Re: Pile of gert parts arrived this morning

Im going to put the lot together as a full prototype board then when I have something working get the parts I need and put it together on its own board. All the schematics are available so you can reproduce just what you need. I can solder reasonably well and have a half decent iron and a ring light...
by gordonendersby
Wed Oct 17, 2012 10:40 am
Forum: Raspbian
Topic: Freezes with new Raspbian from 18-09
Replies: 11
Views: 3048

Re: Freezes with new Raspbian from 18-09

Ive got similar problems after a new install of raspbian 18-09.
http://www.raspberrypi.org/phpBB3/viewt ... 66&t=20163

Now running headless and no errors yet after nearly 24 hours.
So looks, maybe, like an issue with usb power or drivers.

Gordon
by gordonendersby
Wed Oct 17, 2012 10:37 am
Forum: Raspbian
Topic: Wheezy 2012-9-18 locking up usb and networking
Replies: 10
Views: 3720

Re: Wheezy 2012-9-18 locking up usb and networking

I removed the usb hub, keyboard and mouse. Left the Arduino and wireless adaptor. Nearly 24 ours now headless and no lockup. No obvious errors in syslog. So maybe this was a problem with power or a usb driver problem with the hub. Ill keep an eye on it and see how it goes as the idea is to leave thi...
by gordonendersby
Tue Oct 16, 2012 7:50 pm
Forum: General discussion
Topic: Pile of gert parts arrived this morning
Replies: 6
Views: 1098

Pile of gert parts arrived this morning

This lot turned up on my doorstep this morning. https://lh3.googleusercontent.com/-X-ddquW2i9U/UH24pJWwQOI/AAAAAAAAAZA/2ypRCJCw-MM/s436/CameraZOOM-20121016203905023.jpg No wonder some people are baulking at the idea of putting all together. There are a lot of bags of very small components to play wi...
by gordonendersby
Tue Oct 16, 2012 11:11 am
Forum: Raspbian
Topic: Wheezy 2012-9-18 locking up usb and networking
Replies: 10
Views: 3720

Wheezy 2012-9-18 locking up usb and networking

Hi all, Just tried a new install of Raspbian wheezy 2012-9-18. Everything seemed to work out of the box. Wireless setup works great. Using RTL8188CUS 802.11n. I installed mysql, lighttpd, and my perl scripts to communicate to an arduino collecting temperature, pressure and humidity. This has all bee...
by gordonendersby
Tue Oct 09, 2012 7:35 pm
Forum: Networking and servers
Topic: how to put local server on the internet free
Replies: 15
Views: 2851

Re: how to put local server on the internet free

If that isnt secure enough for you then use a firewall like http://www.smoothwall.org/ . This will give you an extra level of security between the internet and your home lan. You can set up the raspi on the DMZ (de militarised zone) a separate lan segregated from your home network. You will need an ...
by gordonendersby
Tue Sep 25, 2012 4:34 pm
Forum: Automation, sensing and robotics
Topic: Best waterproof temperature and humidity sensor solution..
Replies: 7
Views: 10057

Re: Best waterproof temperature and humidity sensor solution

I have a DHT11 tucked up under the eaves outside my office window. So its out of the worst of the weather. I soldered cat5 cable directly to the leads and covered the soldered jounts and expose leads from the device with Sugru( http://sugru.com/ ). Sticks like super glue, is mouldable and waterproof...
by gordonendersby
Tue Sep 11, 2012 2:29 pm
Forum: Other projects
Topic: machine / laser cut metal plates ?
Replies: 4
Views: 1664

Re: machine / laser cut metal plates ?

If you use aluminium you can use the hacksaw and a dremmel to cut quite accurately and it wont take too long. It would cost a lot to get it cut commercially. The most important bit is the template, you will need that anyway for the commercial cutters. I use inkscape for making templates. Once you ha...
by gordonendersby
Sat Sep 08, 2012 3:58 pm
Forum: Off topic discussion
Topic: Dredd
Replies: 8
Views: 1109

Re: Dredd

Remember Starlord http://en.wikipedia.org/wiki/Starlord.
21 issues then merged with 2000ad a lot of the most poular characters cane from there.

Gordon
by gordonendersby
Wed Sep 05, 2012 2:51 pm
Forum: Off topic discussion
Topic: Dredd
Replies: 8
Views: 1109

Re: Dredd

Being of a certain age and having read 2000ad on and off from issue 1.
Ive bought a new Dredd tshirt to wear when I watch the movie.
Ive converted my 15yr old son to the Dredd megazine.

Maybe we can finally bury Stallone's version and the sacrilege of taking his helmet off.

Gordon
by gordonendersby
Tue Aug 28, 2012 5:13 pm
Forum: Beginners
Topic: Raspberry dashcam wanted
Replies: 31
Views: 34104

Re: Raspberry dashcam wanted

Or incorporate a gps receiver and get the time and location as well from the satellites.

Gordon
by gordonendersby
Sun Aug 12, 2012 5:06 pm
Forum: Other projects
Topic: I need help from someone with basic electronic knowlage
Replies: 12
Views: 1621

Re: I need help from someone with basic electronic knowlage

Positive, you want to cut the power.
Ive never come across a device that cuts the negative rather than the positive.


Gordon
by gordonendersby
Sun Aug 12, 2012 4:42 pm
Forum: General discussion
Topic: sub-forum request - Perl
Replies: 8
Views: 1718

Re: sub-forum request - Perl

A perl sub forum would be a good idea. Most of the internet and server farms are held together by perl on linux. Im sure there are more lines of perl out there than python. Im working on something on my raspi at the moment talking to an arduino and I wouldnt want to use anything else than perl as it...

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