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by charly130.mk2
Fri Nov 09, 2012 7:57 am
Forum: Other projects
Topic: Screenly OSE -- Digital Signage for the Raspberry Pi
Replies: 1103
Views: 373361

Re: Screenly OSE -- Digital Signage for the Raspberry Pi

I did not jail the installation. I guess I could run the server under a new user(id) that can only write the database file and logging files, but has no other privileges, if that is what you mean. A jailed installation is basically one that runs in a chrooted environment. Therefore, it can only acc...
by charly130.mk2
Wed Nov 07, 2012 9:15 am
Forum: Other projects
Topic: Screenly OSE -- Digital Signage for the Raspberry Pi
Replies: 1103
Views: 373361

Re: Screenly OSE -- Digital Signage for the Raspberry Pi

Instead, I extended the user-name password based login mechanism that I added earlier to Screenly with support for https, to protect the login credentials On a scale of 1-10, how secure would you say this approach is? Have you also jailed the installation, so that if it is compromised the attacker ...
by charly130.mk2
Wed Sep 19, 2012 8:14 am
Forum: Other projects
Topic: Screenly OSE -- Digital Signage for the Raspberry Pi
Replies: 1103
Views: 373361

Re: Screenly OSE -- Digital Signage for the Raspberry Pi

Hi there I am also interested in this solution. However, in our case, the units would be placed out in the field, with a USB 3G dongle for data connectivity. This however raises two questions a) You mention that screenly only has limited caching in the browser. Any ideas of when the local caching fo...
by charly130.mk2
Thu Aug 02, 2012 11:41 am
Forum: Other programming languages
Topic: Show the ip addresses on i2c LCD on boot
Replies: 5
Views: 3375

Re: Show the ip addresses on i2c LCD on boot

What I do is I have a script executed by Cron every 10 mins that does a "who -b" this gives you the system boot time. Then I compare this with the current time and if there is less than 10 minutes between them I run a similar function to the one detailed above. If not I just exit. Works pretty well...
by charly130.mk2
Thu Aug 02, 2012 8:36 am
Forum: Automation, sensing and robotics
Topic: Irrigation Controller
Replies: 19
Views: 8954

Re: Irrigation Controller

charly130.mk2 wrote:I have also added an R/C dampener,
I meant snubber...
by charly130.mk2
Thu Aug 02, 2012 8:00 am
Forum: Automation, sensing and robotics
Topic: Irrigation Controller
Replies: 19
Views: 8954

Re: Irrigation Controller

Hi all, I have been researching this particular topic for the last two years or so (from before RPis). There are a couple of things I would suggest (but feel free to ignore them... :lol: ) Firstly, as you already know, tying electronics directly to your GPIO lines is risky. Valves especially are kno...
by charly130.mk2
Tue Sep 13, 2011 6:46 am
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 245550

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced

<t>@ vorrias<br/> <br/> Interesting boards... The MAX is a bit more expensive, but as you have mentioned, it has Ethernet and the PIC has more RAM/Flash (in fact the same part as the UBW32). The UNO on the other hard doesn't but its price is better than the UBW32... Plus Arduino shields can be used,...
by charly130.mk2
Mon Sep 12, 2011 8:04 am
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 245550

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced

<r>@diggy<br/> <br/> OK I managed to find some info on the UBW's big brother, the UBW32 (which has a lot more horsepower). It can handle some 12k commands per second (actual measurement, not theoretical, <URL url="http://www.sparkfun.com/products/8971">http://www.sparkfun.com/products/8971</URL>). H...
by charly130.mk2
Wed Sep 07, 2011 10:02 am
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 245550

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced

<t>@diggy<br/> <br/> UBW doesn't need drivers for linux, as linux automatically sees it as a USB->Serial port. So all you need to do is open a term emulator, point it to the port, and start giving it commands. However, you are quite right that for mission critical applications this MAY be slow. As f...
by charly130.mk2
Tue Sep 06, 2011 8:14 am
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 245550

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced

<r>Additionally, since it has a USB port, it could be used in conjunction with a UBW (<URL url="http://www.schmalzhaus.com/UBW">http://www.schmalzhaus.com/UBW</URL>), which is controlled like a serial device. This also means that for those of you with interesting ideas, you can start developing the ...

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