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Re: [Wlug] Help with water level problems

by Mike Peckar

We have one of these - it works great, though the dog freaks out when it goes off. $15. www.leakfrog.com Mike

Aug. 19, 2012

Re: [Wlug] Help with water level problems

by Tim Keller

What you're looking for is called a "waterbug" It has a pair of dry contacts that close a circuit when it gets wet. you could set up an arduino, or just wire it to a buzzer. On 8/18/12, Eric Martin <eric.joshua.martin(a)gmail.com> wrote: > Hey all, > > I had a close call with my hot water heater this afternoon. I heard on odd > noise in the pipes and it turned out that my hot water heater was dumping > water out of the overflow valve. Luckily, I found it quick enough, and I'm > pretty sure I got it handled for < $150. There's a 1 Gal bucket under the > overflow valve, and if I had a water level detector emailing me that water > is in the bucket, I could have caught this earlier. > > I was looking at buying an Arduino and setting up a simple circuit. I know > a few people have played with Arduinos, any suggestions on which one to get > and how to go about it? I don't need to know how much water is in the > bucket, I was thinking about a float type device or even two wires that > trip a relay. I just want a heads up that water is in the bucket so I can > stop before my basement floods. > > Thanks in advance, > -- > Eric Martin > -- Sent from my mobile device I am leery of the allegiances of any politician who refers to their constituents as "consumers".

Aug. 19, 2012

Re: [Wlug] Help with water level problems

by kstratton＠fastmail.us

I can't help on the Arduino stuff except for the most basic of stuff (yet). I do remember seeing an article about a home made sensor using wires and table salt encased in paper. When the paper gets wet, the ionized salt + water conducts electricity. On Sat, Aug 18, 2012, at 09:00 PM, Eric Martin wrote: Hey all, I had a close call with my hot water heater this afternoon. I heard on odd noise in the pipes and it turned out that my hot water heater was dumping water out of the overflow valve. Luckily, I found it quick enough, and I'm pretty sure I got it handled for < $150. There's a 1 Gal bucket under the overflow valve, and if I had a water level detector emailing me that water is in the bucket, I could have caught this earlier. I was looking at buying an Arduino and setting up a simple circuit. I know a few people have played with Arduinos, any suggestions on which one to get and how to go about it? I don't need to know how much water is in the bucket, I was thinking about a float type device or even two wires that trip a relay. I just want a heads up that water is in the bucket so I can stop before my basement floods. Thanks in advance, -- Eric Martin _______________________________________________ Wlug mailing list [1]Wlug(a)mail.wlug.org [2]http://mail.wlug.org/mailman/listinfo/wlug References 1. mailto:Wlug@mail.wlug.org 2. http://mail.wlug.org/mailman/listinfo/wlug -- kstratton(a)fastmail.us

Aug. 19, 2012

Help with water level problems

by Eric Martin

Hey all, I had a close call with my hot water heater this afternoon. I heard on odd noise in the pipes and it turned out that my hot water heater was dumping water out of the overflow valve. Luckily, I found it quick enough, and I'm pretty sure I got it handled for < $150. There's a 1 Gal bucket under the overflow valve, and if I had a water level detector emailing me that water is in the bucket, I could have caught this earlier. I was looking at buying an Arduino and setting up a simple circuit. I know a few people have played with Arduinos, any suggestions on which one to get and how to go about it? I don't need to know how much water is in the bucket, I was thinking about a float type device or even two wires that trip a relay. I just want a heads up that water is in the bucket so I can stop before my basement floods. Thanks in advance, -- Eric Martin

Aug. 19, 2012

Re: [Wlug] A question about KMS API's

by Jason Couture

I apologize for the abbreviations. Kernel Mode Setting and Framebuffer, I found stuff on the framebuffer, using ioctl's, and mmap to work with the graphics, but I can't find any documentation on Kernel Mode Setting (Other than how to use it with Gallium/Intel/Nouveau etc). Basically, We tore the entire userland out from under the kernel, because we don't like it, and we have our base laid out and ready to go, but we want to __start__ with the graphics, and not make them an afterthought like that monstrosity X is. Want to write a small graphics API using the frame buffer (Keeping kernel mode setting in mind for when we switch to hardware acceleration) to design and test the UI using drawing primitives. Reason for wanting to know about Kernel Mode Setting: KMS gives the smooth transition (and from what i understand, also moves quite a bit of the graphics code to the kernel) that you get on say, ubuntu switching from a boot splash to the login window. We'd like to replicate that, but obviously alot more work has to be done before we get there. At least want to know what I need to keep the code ready for it, if that makes sense. Please keep in mind that no libraries can be used for this, only available binaries are ones written by myself, not even gnu libc is available. Only calls involving the kernel headers are available. The framebuffer, As i've said, I figured out. need to be mmap()ed, and ioctl is used to set/query various operational parameters (Resolution, refresh rate, manufacturer) I am not going to modify the kernel at all, with the exception of a builtin command line, I don't think i'd call that a modification though. On Thu, Aug 16, 2012 at 11:25 PM, Keith Wright <kwright(a)keithdiane.us> wrote: >> From: Jason Couture <plaguethenet(a)gmail.com> >> >> Anyone know anything about the KMS API? From userland? I'm working on >> a project and would like to use KMS/FB directly, as at boot there will >> be no binaries available except ours, No libc even. Just a few static >> binaries. if anyone could point me in the right direction, it would be >> greatly appreciated it. I can't seem to find anything on it on google, >> and I really don't have the time to go pouring over the kernel source. > > KMS? Kilogram/Meter/Second? No API for that. > > Kernel Module System? I wrote a couple of kernel > modules quite a while ago. I found the following > to be very useful: > > Corbet, Rubini, Kroah-Hartman; "Linux Device Drivers", > O'Reilly > > Key Managment Service? I know nothing, but it sounds evil. > > Kernel Mode Setting? I found that via Google. You mention FB > which might mean Frame Buffer, which might mean you are trying > to set the display resolution. If that's the case, the above > reference might still be useful, but what you really need is > technical data sheets for the graphic card you want to use. > > Too many TLA's > > -- Keith > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

Aug. 17, 2012

Re: [Wlug] A question about KMS API's

by Keith Wright

> From: Jason Couture <plaguethenet(a)gmail.com> > > Anyone know anything about the KMS API? From userland? I'm working on > a project and would like to use KMS/FB directly, as at boot there will > be no binaries available except ours, No libc even. Just a few static > binaries. if anyone could point me in the right direction, it would be > greatly appreciated it. I can't seem to find anything on it on google, > and I really don't have the time to go pouring over the kernel source. KMS? Kilogram/Meter/Second? No API for that. Kernel Module System? I wrote a couple of kernel modules quite a while ago. I found the following to be very useful: Corbet, Rubini, Kroah-Hartman; "Linux Device Drivers", O'Reilly Key Managment Service? I know nothing, but it sounds evil. Kernel Mode Setting? I found that via Google. You mention FB which might mean Frame Buffer, which might mean you are trying to set the display resolution. If that's the case, the above reference might still be useful, but what you really need is technical data sheets for the graphic card you want to use. Too many TLA's -- Keith

Aug. 17, 2012

A question about KMS API's

by Jason Couture

Anyone know anything about the KMS API? From userland? I'm working on a project and would like to use KMS/FB directly, as at boot there will be no binaries available except ours, No libc even. Just a few static binaries. if anyone could point me in the right direction, it would be greatly appreciated it. I can't seem to find anything on it on google, and I really don't have the time to go pouring over the kernel source.

Aug. 17, 2012

Re: [Wlug] Wlug Digest, Vol 106, Issue 5

by Karl Lind

Hi Chuck, It doesn't have to be 2 HDMI compatible outputs. It just came to me that the Pi has a composite video and a stereo audio out port too. One of each would be super as I have power supplies, keyboards and mice for both my Pi's. The four OS's (which might be overkill for time) that I plan to bring for the demo are Raspian (a Debian distro that is running a web server), Gentoo, Fedora and OpenELEC (an XBMC type distro). Also if possible Ethernet access? Karl On Thu, Aug 16, 2012 at 12:00 PM, <wlug-request(a)mail.wlug.org> wrote: > Send Wlug mailing list submissions to > wlug(a)mail.wlug.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://mail.wlug.org/mailman/listinfo/wlug > or, via email, send a message with subject or body 'help' to > wlug-request(a)mail.wlug.org > > You can reach the person managing the list at > wlug-owner(a)mail.wlug.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Wlug digest..." > > > Today's Topics: > > 1. September talk (Karl Lind) > 2. Re: September talk (Steve Pelland) > 3. Re: September talk (Chuck Anderson) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 16 Aug 2012 09:56:44 -0400 > From: Karl Lind <electrolind(a)gmail.com> > Subject: [Wlug] September talk > To: Wlug(a)mail.wlug.org > Message-ID: > <CAD3a= > eDBaeqHvAXisgYRk-3zENk9gZKZkLC6xd3TkhREhqFCbg(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Yep, still up for it. Is there a way to connect two HDMI sources up to > projector/tv/video in the room? Reason I have two Pi's and I thought after > the talk can have two running for demo purposes. > > Karl > > Date: Mon, 13 Aug 2012 12:51:25 -0400 > From: Frank Sweetser <fs(a)WPI.EDU> > Subject: Re: [Wlug] September meeting topic? > To: Worcester Linux Users Group <wlug(a)mail.wlug.org> > Message-ID: <5029308D.3090301(a)wpi.edu> > Content-Type: text/plain; charset=ISO-8859-1 > > > Hi Karl, > > are you still up for giving a talk on the Pi for the September meeting? > So > far as I know it's open for topics, and that sounds like a great one. > > Frank Sweetser fs at wpi.edu | For every problem, there is a solution > that > Manager of Network Operations | is simple, elegant, and wrong. > Worcester Polytechnic Institute | - HL Mencken > > On 07/13/2012 08:43 PM, Karl Lind wrote: > > Howdy all, > > > > I would like to give a talk on the Raspberry Pi project and I have two > > of them to demonstrate various OS's (I have worked with the Debian and > > Fedora implementations and look forward to the others as they come > > out.). I have four SD cards, so that's the number of OS's I can bring > > with me. > > > > Have a great summer! > > > > Karl > > ______________________________ > _________________ > > Wlug mailing list > > Wlug(a)mail.wlug.org > > http://mail.wlug.org/mailman/listinfo/wlug > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://mail.wlug.org/pipermail/wlug/attachments/20120816/623c6308/attachmen… > > ------------------------------ > > Message: 2 > Date: Thu, 16 Aug 2012 10:46:45 -0400 > From: Steve Pelland <steve.pelland(a)gmail.com> > Subject: Re: [Wlug] September talk > To: Worcester Linux Users Group <wlug(a)mail.wlug.org> > Message-ID: > <CAMmWueRGFZ2LYnrnsTQv=j=8uWW6rD= > yoDvufRi19VMYZO-dyg(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Karl, > This meeting will be at the usual place? This will be the first one I get > to attend. I also have a Pi and wanted to chat with others that have Pi's > so this will be a great start. > > Steve > > On Thu, Aug 16, 2012 at 9:56 AM, Karl Lind <electrolind(a)gmail.com> wrote: > > > Yep, still up for it. Is there a way to connect two HDMI sources up to > > projector/tv/video in the room? Reason I have two Pi's and I thought > after > > the talk can have two running for demo purposes. > > > > Karl > > > > Date: Mon, 13 Aug 2012 12:51:25 -0400 > > From: Frank Sweetser <fs(a)WPI.EDU> > > Subject: Re: [Wlug] September meeting topic? > > To: Worcester Linux Users Group <wlug(a)mail.wlug.org> > > Message-ID: <5029308D.3090301(a)wpi.edu> > > Content-Type: text/plain; charset=ISO-8859-1 > > > > > > Hi Karl, > > > > are you still up for giving a talk on the Pi for the September meeting? > > So > > far as I know it's open for topics, and that sounds like a great one. > > > > Frank Sweetser fs at wpi.edu | For every problem, there is a > solution > > that > > Manager of Network Operations | is simple, elegant, and wrong. > > Worcester Polytechnic Institute | - HL Mencken > > > > On 07/13/2012 08:43 PM, Karl Lind wrote: > > > Howdy all, > > > > > > I would like to give a talk on the Raspberry Pi project and I have two > > > of them to demonstrate various OS's (I have worked with the Debian and > > > Fedora implementations and look forward to the others as they come > > > out.). I have four SD cards, so that's the number of OS's I can bring > > > with me. > > > > > > Have a great summer! > > > > > > Karl > > > ______________________________ > > _________________ > > > Wlug mailing list > > > Wlug(a)mail.wlug.org > > > http://mail.wlug.org/mailman/listinfo/wlug > > > > > > > _______________________________________________ > > Wlug mailing list > > Wlug(a)mail.wlug.org > > http://mail.wlug.org/mailman/listinfo/wlug > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://mail.wlug.org/pipermail/wlug/attachments/20120816/a136e845/attachmen… > > ------------------------------ > > Message: 3 > Date: Thu, 16 Aug 2012 11:15:10 -0400 > From: Chuck Anderson <cra(a)WPI.EDU> > Subject: Re: [Wlug] September talk > To: Worcester Linux Users Group <wlug(a)mail.wlug.org> > Message-ID: <20120816151510.GA6563(a)angus.ind.WPI.EDU> > Content-Type: text/plain; charset=us-ascii > > The meeting room is still TBD. I can find out about connecting 2 HDMI > sources--we should be able to come up with something. > > On Thu, Aug 16, 2012 at 10:46:45AM -0400, Steve Pelland wrote: > > Karl, > > This meeting will be at the usual place? This will be the first one I > get > > to attend. I also have a Pi and wanted to chat with others that have Pi's > > so this will be a great start. > > > > Steve > > > > On Thu, Aug 16, 2012 at 9:56 AM, Karl Lind <electrolind(a)gmail.com> > wrote: > > > > > Yep, still up for it. Is there a way to connect two HDMI sources up to > > > projector/tv/video in the room? Reason I have two Pi's and I thought > after > > > the talk can have two running for demo purposes. > > > > > > Karl > > > > > > Date: Mon, 13 Aug 2012 12:51:25 -0400 > > > From: Frank Sweetser <fs(a)WPI.EDU> > > > Subject: Re: [Wlug] September meeting topic? > > > To: Worcester Linux Users Group <wlug(a)mail.wlug.org> > > > Message-ID: <5029308D.3090301(a)wpi.edu> > > > Content-Type: text/plain; charset=ISO-8859-1 > > > > > > > > > Hi Karl, > > > > > > are you still up for giving a talk on the Pi for the September > meeting? > > > So > > > far as I know it's open for topics, and that sounds like a great one. > > > > > > Frank Sweetser fs at wpi.edu | For every problem, there is a > solution > > > that > > > Manager of Network Operations | is simple, elegant, and wrong. > > > Worcester Polytechnic Institute | - HL Mencken > > > > > > On 07/13/2012 08:43 PM, Karl Lind wrote: > > > > Howdy all, > > > > > > > > I would like to give a talk on the Raspberry Pi project and I have > two > > > > of them to demonstrate various OS's (I have worked with the Debian > and > > > > Fedora implementations and look forward to the others as they come > > > > out.). I have four SD cards, so that's the number of OS's I can bring > > > > with me. > > > > > > > > Have a great summer! > > > > > > > > Karl > > > ------------------------------ > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > > > End of Wlug Digest, Vol 106, Issue 5 > ************************************ >

Aug. 16, 2012

Re: [Wlug] September talk

by Chuck Anderson

The meeting room is still TBD. I can find out about connecting 2 HDMI sources--we should be able to come up with something. On Thu, Aug 16, 2012 at 10:46:45AM -0400, Steve Pelland wrote: > Karl, > This meeting will be at the usual place? This will be the first one I get > to attend. I also have a Pi and wanted to chat with others that have Pi's > so this will be a great start. > > Steve > > On Thu, Aug 16, 2012 at 9:56 AM, Karl Lind <electrolind(a)gmail.com> wrote: > > > Yep, still up for it. Is there a way to connect two HDMI sources up to > > projector/tv/video in the room? Reason I have two Pi's and I thought after > > the talk can have two running for demo purposes. > > > > Karl > > > > Date: Mon, 13 Aug 2012 12:51:25 -0400 > > From: Frank Sweetser <fs(a)WPI.EDU> > > Subject: Re: [Wlug] September meeting topic? > > To: Worcester Linux Users Group <wlug(a)mail.wlug.org> > > Message-ID: <5029308D.3090301(a)wpi.edu> > > Content-Type: text/plain; charset=ISO-8859-1 > > > > > > Hi Karl, > > > > are you still up for giving a talk on the Pi for the September meeting? > > So > > far as I know it's open for topics, and that sounds like a great one. > > > > Frank Sweetser fs at wpi.edu | For every problem, there is a solution > > that > > Manager of Network Operations | is simple, elegant, and wrong. > > Worcester Polytechnic Institute | - HL Mencken > > > > On 07/13/2012 08:43 PM, Karl Lind wrote: > > > Howdy all, > > > > > > I would like to give a talk on the Raspberry Pi project and I have two > > > of them to demonstrate various OS's (I have worked with the Debian and > > > Fedora implementations and look forward to the others as they come > > > out.). I have four SD cards, so that's the number of OS's I can bring > > > with me. > > > > > > Have a great summer! > > > > > > Karl

Aug. 16, 2012

Re: [Wlug] September talk

by Steve Pelland

Karl, This meeting will be at the usual place? This will be the first one I get to attend. I also have a Pi and wanted to chat with others that have Pi's so this will be a great start. Steve On Thu, Aug 16, 2012 at 9:56 AM, Karl Lind <electrolind(a)gmail.com> wrote: > Yep, still up for it. Is there a way to connect two HDMI sources up to > projector/tv/video in the room? Reason I have two Pi's and I thought after > the talk can have two running for demo purposes. > > Karl > > Date: Mon, 13 Aug 2012 12:51:25 -0400 > From: Frank Sweetser <fs(a)WPI.EDU> > Subject: Re: [Wlug] September meeting topic? > To: Worcester Linux Users Group <wlug(a)mail.wlug.org> > Message-ID: <5029308D.3090301(a)wpi.edu> > Content-Type: text/plain; charset=ISO-8859-1 > > > Hi Karl, > > are you still up for giving a talk on the Pi for the September meeting? > So > far as I know it's open for topics, and that sounds like a great one. > > Frank Sweetser fs at wpi.edu | For every problem, there is a solution > that > Manager of Network Operations | is simple, elegant, and wrong. > Worcester Polytechnic Institute | - HL Mencken > > On 07/13/2012 08:43 PM, Karl Lind wrote: > > Howdy all, > > > > I would like to give a talk on the Raspberry Pi project and I have two > > of them to demonstrate various OS's (I have worked with the Debian and > > Fedora implementations and look forward to the others as they come > > out.). I have four SD cards, so that's the number of OS's I can bring > > with me. > > > > Have a great summer! > > > > Karl > > ______________________________ > _________________ > > Wlug mailing list > > Wlug(a)mail.wlug.org > > http://mail.wlug.org/mailman/listinfo/wlug > > > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > >

Aug. 16, 2012