#raspberrypi IRC Log

Index

IRC Log for 2014-01-23

Timestamps are in GMT/BST.

[13:21] -card.freenode.net- *** Looking up your hostname...
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[13:22] * RaspberryPiBot (~PircBot@unaffiliated/datagutt/bot/databot) has joined #raspberrypi
[13:22] * Topic is 'Unofficial RaspberryPi IRC channel but "Blessed" by the Foundation as the ONE channel. Logs @ http://srv.datagutt1.com <> Channel Rules: http://tiny.cc/h7za1w <> Getting help on IRC: http://tiny.cc/p9za1w <>'
[13:22] * Set by ShiftPlusOne!~Shift@unaffiliated/shiftplusone on Sun Aug 04 19:59:52 CEST 2013
[13:22] * reZo (~gareth@202-180-86-196.callplus.net.nz) Quit ()
[13:26] <Datalink> the 10K resistor's a pull-(up/down) resistor, and the 1K resistor protects the button from surges, you can safely (and preferably) use the Pi's own 3.3v rail, however if you use a different device to power the switch (not sure why but hey, it can happen) make sure ground is common between the Pi and the other power circuit, so 3.3v is the same.
[13:31] * sphenxes (~sphenxes@91-119-53-55.dynamic.xdsl-line.inode.at) Quit (Remote host closed the connection)
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[13:32] <pwillard> easypeasy... newark has the replacement SD card socket
[13:35] * badass (~badass@unaffiliated/badass) has joined #raspberrypi
[13:35] <pwillard> :-) MULTICOMP CONNECTOR, MEMORY SOCKET, 90POS, 1.63M Part -> 412D02F-09PC003SV Newark Part-> 47W3815
[13:37] * nx5_off is now known as nx5
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[13:38] <gordonDrogon> basti, have you solved the issue?
[13:41] * electron_ (cb81c382@gateway/web/freenode/ip.203.129.195.130) has joined #raspberrypi
[13:41] * digitlman (~chatzilla@rrcs-70-62-111-210.midsouth.biz.rr.com) has joined #raspberrypi
[13:42] <electron_> just about to begin a project .. wanted to know if the gpu framebuffer is accesible over the dma
[13:43] <gordonDrogon> isn't it just main memory?
[13:43] <electron_> yeah its main memory
[13:43] <electron_> but a small section is kept seperate for the gpu alone right
[13:43] <gordonDrogon> open /dev/fb and poke pixels into it?
[13:43] <digitlman> hello all. I am getting this error when trying to insttall watchdog 5.21: run/udev or .udevdb or .udev presence implies active udev. Aborting MAKEDEV invocation.
[13:43] * Cy-Gor (~Brian@cpe-70-124-70-140.austin.res.rr.com) has joined #raspberrypi
[13:43] <digitlman> insserv: warning: script 'mathkernel' missing LSB tags and overrides
[13:43] <electron_> so is the gpu's memory accesible from userspace?
[13:44] <gordonDrogon> electron_, not 100% sure but I think so - the closest I get to it in my stuff is using SDL which pokes pixels into a 'shadow' copy then block-moves the shadow to the main framebuffer.
[13:45] <electron_> poking pixels into it is fine .. but what i need to do actually is read the framebuffer and send it via spi or uart or o simply gpio
[13:45] <electron_> that too via dma .. dont want to tax cpu shifting pixels
[13:46] * bortzmeyer (~stephane@central.sources.org) has joined #raspberrypi
[13:47] <digitlman> ack...I think I found the answer here: http://www.raspberrypi.org/forum/viewtopic.php?t=64736&p=476956
[13:47] <gordonDrogon> I wrote code for an LCD that was updated via SPI a while back. I didn't use the main framebuffer though, but created one of my own.
[13:48] <electron_> woah .. i think your reading my mind :P
[13:49] <electron_> so this frambuffer isnt acelerated via gpu right ? the one you wrote ?
[13:51] <electron_> gordonDrogon , can i have your code ?
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[13:52] * Encrypt (~Chuck-nor@AMontsouris-553-1-42-104.w92-151.abo.wanadoo.fr) has joined #raspberrypi
[13:52] <gordonDrogon> electron_, no aceleration - it's just pixel pushing.
[13:53] <electron_> okay ,,
[13:53] <gordonDrogon> there is an LCD from adafruit that does the same - and has a Linux kernel framebuffer interface (mine hasn't).
[13:53] <gordonDrogon> I think they publisehd all the code.
[13:54] <gordonDrogon> however if you have wiringPi, then have a look in devLib/lcd128x64.c
[13:54] <electron_> cool ,
[13:54] <gordonDrogon> it's for a very specific monochrom LCD display, but the pixel pushing code is fairly generic (I took most of it from my BASIC which uses SDL)
[13:54] <gordonDrogon> http://unicorn.drogon.net/128x64.jpg
[13:57] * felipealmeida (~user@179.210.237.70) Quit (Quit: ERC Version 5.3 (IRC client for Emacs))
[13:57] <electron_> gordonDrogon , cool thanks .. ill look into it
[13:57] * kazuhiko (~kazuhiko@220.110.131.41) Quit (Ping timeout: 240 seconds)
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[14:00] <gordonDrogon> electron_, actually, I've just realised that code doesn't use SPI - just raw GPIO. still manages 130 fps though.
[14:01] <electron_> cool ! ..
[14:01] <gordonDrogon> I did code for a colour LCD with a touchscreen that never made it to market though (shame). That did use the SPI bus to drive it.
[14:01] <gordonDrogon> that display would do about 30fps, but it was much bigger and 16-bit colour.
[14:01] <electron_> it'd be awesome if dma could be implemented and free the cpu
[14:01] <gordonDrogon> SPI more or less does that.
[14:02] <electron_> you sure ?!
[14:02] <gordonDrogon> the issue was knowing when to trigger a screen update...
[14:02] <gordonDrogon> Hm. maybe it's just interrupts and a FIFO on the SPI. it's been a while since I looked deeply into it.
[14:02] <electron_> the spi modules use the dma
[14:03] * crucl0 (~alekzp@78.164.229.0) Quit (Quit: Leaving.)
[14:03] <electron_> okay ..
[14:03] * Pitel_IPEX (~pitel@gatekeeper.bm.ipex.cz) Quit (Read error: Operation timed out)
[14:05] * Phosie (~Sophie@unaffiliated/phosie) Quit (Quit: Aber ja, natürlich Hans nass ist, er steht unter einem Wasserfall.)
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[14:12] * SopaXT (57e44c03@gateway/web/freenode/ip.87.228.76.3) Quit (Quit: Page closed)
[14:12] <digitlman> well, I uninstalled the wolfram-engine, but till get: /run/udev or .udevdb or .udev presence implies active udev. Aborting MAKEDEV invocation.
[14:12] <digitlman> when installing watchdog
[14:15] * mike_t (~mike@pluto.dd.vaz.ru) Quit (Remote host closed the connection)
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[14:15] * kazuhiko (~kazuhiko@220.110.131.41) Quit (Ping timeout: 248 seconds)
[14:16] <gordonDrogon> woof.
[14:17] * KuchenKerze (~kuchenker@hide.netuse.de) Quit ()
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[14:19] <digitlman> any thoughts why?
[14:19] <gordonDrogon> none whatsoever, sorry.
[14:20] <gordonDrogon> I don't use watchdogs on the Pi.
[14:20] <gordonDrogon> now wolfram.
[14:20] <gordonDrogon> *nor
[14:20] * electron_ (cb81c382@gateway/web/freenode/ip.203.129.195.130) Quit (Ping timeout: 272 seconds)
[14:20] * aykut (~aykut@unaffiliated/aykut) Quit (Read error: Connection reset by peer)
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[14:21] <digitlman> ahh
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[14:40] <bigx> hi there
[14:41] <bigx> i'm trying to use the composite output with a Minitel (french ancestor of the internet:https://dl.dropboxusercontent.com/u/17657227/Info/blog/minitel.jpg)
[14:41] <bigx> but the image is a bit too contrasted
[14:42] <bigx> do you know if there is some settings i can adjust in the config.txt?
[14:47] <bigx> reading http://elinux.org/RPiconfig I see sdtv_disable_colourburst=1 maybe a good idea
[14:47] <bigx> what do you think? any other idea?
[14:48] * gbaman (~gbaman@host86-135-244-110.range86-135.btcentralplus.com) Quit (Remote host closed the connection)
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[15:30] <pwillard> Hmmm. I can mount a USB drive and access it if I'm priv'd, but not if I'm just "me", joe user. did I miss a step?
[15:32] <ppq> pwillard: you can use the mount option "users" in the corresponding fstab entry to allow users mounting and umounting it without sudo
[15:32] <pwillard> hehe, yup, missed a step... thanks
[15:33] <pwillard> VNC access was showing it mounted... but access was denied.
[15:33] <ppq> usually a desktop envorinment takes care of (automatic) mounts
[15:33] <ppq> if you have one installed, that is
[15:34] <pwillard> only thing odd is I use a different account, not pi.
[15:35] <ppq> then it might be related to group memberships
[15:35] <ppq> make sure your new user is in the same groups as "pi"
[15:35] * zproc (~zproc@laf31-6-82-241-3-109.fbx.proxad.net) Quit (Quit: zproc)
[15:35] <pwillard> Oh, logical... thanks
[15:35] <ppq> run "groups" to check what groups the current user is in
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[15:36] <ShadowJK> my rpi's cpu is at 100% load, default clocks, 29C cpu temp
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[15:48] <rosslazer_> Hello cam anyone tell me about the overhead of starting X vs. using an image buffer to display a slideshow?
[15:49] <rosslazer_> *can
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[15:53] <pwillard> thanks ppq, issue fixed with a simple "usermod" command... :)
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[16:06] <DDave> anyone installed freebsd 10 yet?
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[17:53] <johncs> I try timelapse piping the output of raspistill into avconv but it always produces poor resolution
[17:54] <johncs> when I do the same via files it works OK
[17:54] <johncs> any ideas?
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[17:55] <djazz> johncs: are you trying to encode while taking pictures?
[17:55] <johncs> indeed
[17:55] <djazz> why?
[17:55] <johncs> I don't have enough storage for all the jpg files
[17:56] <djazz> I've never piped out from raspistill when in timelapse mode
[17:56] * malcom2073 (~quassel@unaffiliated/malcom2073) Quit (Quit: http://quassel-irc.org - Chat comfortably. Anywhere.)
[17:56] <johncs> It works (ish) if you specify -e jpg on raspistill and -f mjpeg on avconv
[17:57] <johncs> but the resolution is 64x48
[17:57] <djazz> ah
[17:57] <johncs> not 640x480
[17:58] <ppq> try specifying the resolution manually for avconv
[17:58] <johncs> any hint on how to do that?
[17:58] * lord4163 (~lord4163@81-232-61-81-no226.tbcn.telia.com) has joined #raspberrypi
[18:00] <johncs> I've been looking at documentation but can't find a suitable parameter
[18:05] <ppq> -s vga or -s 640x480
[18:07] <johncs> thanks - I'll try that
[18:08] * Macuser (~textual@unaffiliated/macuser) Quit (Ping timeout: 248 seconds)
[18:08] <johncs> :-( option video_size not found
[18:09] <ppq> if i may ask, what are you planning to do with this setup?
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[18:10] <johncs> I want to be able to record a whole day to show the local council where our
[18:10] <johncs> garden gets flodded when there is heavy rain - due to road run-off
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[18:11] <johncs> if I don't crack this resolution issue I will attach an external drive and use that for the jpg storage.
[18:11] * SuperLag is now known as Guest78390
[18:12] <ppq> then you should take a look at 'motion'. it's a simple program that detects motion and starts recording accordingly. it's also capable of streaming mjpg over http
[18:12] * oldtopman (~oldtopman@unaffiliated/oldtopman) Quit (Ping timeout: 240 seconds)
[18:13] <ppq> you can configure how much of the picture has to change (disregarding light changes) to trigger the recording
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[18:13] <gordonDrogon> can't you just take stills every minute or 2, then externall use something like openshot to make a movie?
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[18:13] <johncs> thanks ppq for another line to try
[18:14] <gordonDrogon> or use a DSLR in time-lapse mode...
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[18:16] <johncs> no DSLR - the prior idea works but needs more storage than I have
[18:17] <johncs> for a full day - hence wanting to pipe the pics direct into the encoder.
[18:17] <CDR`> You dont need a DSLR
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[18:17] <CDR`> I've used a point and shoot for when it was snowing
[18:18] <johncs> I need to get the camera manual out then.
[18:18] <ppq> johncs: so basicsally you want a 24h video with 0.1 fps (or something)? there has to be an easier, straight-forward way
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[18:19] <uid69> I'm doing time lapse of snow melting.. might work for you too
[18:20] <uid69> raspistill -t 900000000 -tl 30000 -o /media/32JoeBall/TL2/image%08d.jpg
[18:20] <uid69> that's every 30 seconds. Then compiling the photos into a video isn't too hard.
[18:21] <uid69> I just used windows movie maker to complie a couple days into one video.. looked really good. Next attempt will be seeing if i can have the frames fade into one another.
[18:21] <johncs> ppq: I wondered if I could get the encoding software to take images direct
[18:22] <uid69> converting a day into a video took all of a minute for me.
[18:22] <johncs> from the pi camera - I've seen code to do it from a web-cam.
[18:23] <ppq> johncs: sure, the pi cam has video4linux2 support, iirc
[18:23] <ppq> so you can treat it like any UVC webcam
[18:23] <ppq> there's something about this in the wiki
[18:23] <johncs> I haven't found the entry in /dev that I would need for that code
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[18:26] <ppq> johncs: http://elinux.org/Rpi_Camera_Module#Video4Linux2
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[18:27] <ppq> you may need to do some compiling
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[18:28] <ppq> when that is done, you can access /dev/video0 directly with avconv, using -f video2linux. -vcodec mjpeg -s 640x480 specifies the format. and it's certainly possible to set the frame rate
[18:29] <johncs> Many thanks for that link. I'm OK with compiling
[18:29] <johncs> so I'll need to go away and experiment. Your help is much appreciated
[18:29] <ppq> you should probably use the official (beta) driver
[18:30] <ppq> good luck!
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[18:31] <wo3> i made beats with a raspberry pi
[18:31] <wo3> https://www.youtube.com/watch?v=Mci4vNVVeRY
[18:32] <wo3> is nice
[18:32] <Vinny4> I'm trying to send data to an Android tablet from my RPi over Bluetooth, via an RFCOMM socket. After sending anywhere from 5k-200k of data, the send calls start to block.
[18:32] <Vinny4> Has anyone seen anything similar?
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[18:40] <Vinny4> Anyone with Bluetooth experience that can help out? :-)
[18:40] <IT_Sean> Vinny4: just ask your question... if someone can help, they will.
[18:41] <Vinny4> Will do, thanks Sean.
[18:41] * IT_Sean nods
[18:41] <Vinny4> I'm trying to send data to an Android tablet from my RPi over Bluetooth, via an RFCOMM socket. After sending anywhere from 5k-200k of data, the send calls start to block.
[18:41] <Vinny4> I've tried both doing a select() with my socket in a write fd set, and a send().
[18:41] <Vinny4> Both block after a while.
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[18:42] <Vinny4> I've also taken an hcidump trace, and I'm seeing that the "Number of completed packet" events don't match up with the "ACL data" messages.
[18:42] * GerhardSchr (~GerhardSc@unaffiliated/gerhardschr) Quit (Read error: Operation timed out)
[18:43] <Vinny4> Once the lockup occurs, the former is always less than the latter by exactly the number of ACL buffers that hciconfig shows for the adapter.
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[18:44] <Vinny4> It sort of seems like I'm losing HCI completed packet reports, but AFAIK the higher order protocols are reliable, so they should be resent.
[18:44] <Vinny4> Has anyone seen anything similar on the Pi at all?
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[19:43] <Raynerd> Guys trying to run : sudo pip install rpi.gpio and I'm getting error wheels installs requires setup tools >= 0.8 .... I presume I need to upgrade setup tools??? Any help
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[19:56] <gordonDrogon> sudo apt-get update ; sudo apt-get upgrade
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[19:59] <gordonDrogon> isn't rpi.gpio installed via apt-get anyway?
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[20:17] <neredsenvy> I'm given the following option to overclock my RPi 700, 800, 900, 1000Mhz
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[20:18] * IT_Sean (~Ult_Ubunt@applefritter/IRCStaff/UltimateMacUser1) Quit (Read error: Operation timed out)
[20:18] <neredsenvy> Without any additional cooling what is still safe overclock
[20:18] <neredsenvy> 800 ?
[20:18] <donta> I'm running at 900
[20:18] <donta> no cooling
[20:18] * sraue (~stephan@xbmc/staff/sraue) Quit (Quit: Ex-Chat)
[20:19] <pksato> cooling not help overclocking like on x86 cpus.
[20:19] <donta> is there a way to check if my rpi requires reboot?
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[20:19] <neredsenvy> So it should be still safe to overclock it to 900 with no cooling
[20:20] <neredsenvy> I mean I dont have it fully boxed just the underside
[20:20] <pksato> donta: is working fine? no need reboot.
[20:20] <x29a> donta: why would it require a reboot?
[20:20] <neredsenvy> but i dont have a heatsink or soemthing
[20:20] <x29a> maybe if you want to boot a new kernel
[20:20] <donta> ^
[20:20] <pksato> neredsenvy: just provide some sort of air flow cooling, on both side os PCB.
[20:20] <pksato> of PCB
[20:20] <msodrew> Anyone know when we'll see the light of that Intel Edison SoC they were showing off at CES? Looks like it would be a formidable form-factor update for the raspberry pi crowd.
[20:20] <donta> I'm at like 190 days of uptime and I don't want to reboot unless its for a kernel update
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[20:31] <Smrtz|Lab> Hey, I'm running Raspian, and it's failing to boot, it's hanging on a bad daemon, is there anything I can do?
[20:32] <cato> call an exorcist
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[20:33] <Smrtz|Lab> cat
[20:33] <Smrtz|Lab> cato, so there's no recovery image, or anything like that?
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[20:36] <liamstask> any chance anybody knows of a project in which a pi presents itself as a headset device via bluetooth? i'm trying to figure out how to get video chat software on a mobile phone to send its audio to the pi.
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[20:36] <liamstask> when connected as an a2dp, music players will stream to it, but not video chat software.
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[20:37] <SpeedEvil> Anyone up for some industrial control work with their pi? http://londonist.com/2014/01/victoria-line-closed-due-to-flooding-at-victoria.php
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[20:46] <melwyn> hey everyone! i have a project where i need to spin something 1/4 per period. first stop at 90�, second at 180�, third at 270� and last one at 0/360�. i bought a continuous servo for testing but that don't seem to work, it just can turn cw/ccw but not a given distance/angle. what should i use instead?!
[20:46] <melwyn> i think a standard servo won't go above 270�, right?
[20:48] * Seditio (William@unaffiliated/seditio) Quit (Read error: Connection reset by peer)
[20:48] <SpeedEvil> A stepper motor will work well.
[20:48] <SpeedEvil> In principle.
[20:49] <SpeedEvil> Or you can add a position encoder to your existing system.
[20:49] <SpeedEvil> Do you need approximate - or very accurate?
[20:49] * Seditio (William@unaffiliated/seditio) has joined #raspberrypi
[20:49] <melwyn> well, let me show you a image, so you know what i want to build, hang on
[20:52] <melwyn> the motor will drive the wheel and move the holes 1/4 every pulse: http://i.imgur.com/NXbtf7m.png
[20:52] <melwyn> so it needs to be quite accurate
[20:53] * zproc (~zproc@laf31-6-82-241-3-109.fbx.proxad.net) has joined #raspberrypi
[20:53] <SpeedEvil> is this a marble machine?
[20:53] * m8 (~m@unaffiliated/m8) Quit (Ping timeout: 252 seconds)
[20:53] <melwyn> kind of, yes.. for feeding squirrels with nuts
[20:53] <SpeedEvil> ah
[20:53] <SpeedEvil> Easy way.
[20:53] <SpeedEvil> Add a microswitch or similar device.
[20:54] <SpeedEvil> To detect when one of the holes passes over it
[20:54] <Tryn> Automatic Squirrel Feeder? Interesting...
[20:54] <melwyn> ohh, good point!!!
[20:54] <SpeedEvil> Also - for the general interest - I present:
[20:54] <melwyn> i will tell you, when the project will go online. i will add squirrel-detection and auto-image/video upload :)
[20:55] <SpeedEvil> http://www.youtube.com/watch?v=8YEdHjGMeho
[20:55] <SpeedEvil> CNC cookies
[20:55] * napos (~na@151.150.191.90.dyn.estpak.ee) Quit (Ping timeout: 252 seconds)
[20:55] <melwyn> wow! that is a whole new level :D
[20:57] <melwyn> thanks for the hints SpeedEvil, i think you've helped me the last time as well
[20:57] <SpeedEvil> :)
[20:57] * tenmilestereo (~tnmlstr@w-244.cust-3410.ip.static.uno.uk.net) has joined #raspberrypi
[20:59] <azizLIGHTS> i just realized i have a UPS for pi? i bought a battery pack for my phone with a micro usb male to plug to phone, and micro usb female port to charge the battery pack itself
[20:59] * melwyn (~cf@2a02:1205:34e1:c6a0:b5b1:def1:94d4:e029) Quit (Quit: Leaving)
[20:59] <azizLIGHTS> when its plugged to phone, and to wall, it passes the current from wall to phone directly (measured the mA via android)
[21:00] <azizLIGHTS> when its only plugged to phone, it gives the battery's charge to phone
[21:00] <azizLIGHTS> i can use this on the pi !
[21:01] * napos (~na@151.150.191.90.dyn.estpak.ee) has joined #raspberrypi
[21:02] * Tagor (~Tagor@53567E1F.cm-6-7b.dynamic.ziggo.nl) has joined #raspberrypi
[21:02] * msodrew (~msodrew@cpe-66-65-120-56.nyc.res.rr.com) Quit (Quit: msodrew)
[21:02] <Tagor> Is there a solution to power several raspberries?
[21:03] * msodrew (~msodrew@cpe-66-65-120-56.nyc.res.rr.com) has joined #raspberrypi
[21:05] <rikkib> I use dc-dc convertors at 2A each so can power two RPi with each dc-dc convertor
[21:06] <rikkib> Any DC supply that has the current needed
[21:06] <rikkib> I use 1.1A poly fuses and power via the gpio 5V pin
[21:07] <Tagor> I'm actually looking to power at least 5 rpis
[21:08] <rikkib> The dc-dc convertors are a $2 each of less from China
[21:08] <Tagor> rikkib: where can I find those?
[21:09] <rikkib> http://www.aliexpress.com/item/5-PCS-LLOT-LM2596-DC-DC-Converter-Power-Supply-Buck-Step-Down-Module-4-40V-to/526499533.html
[21:10] <rikkib> $5USD each sorry
[21:10] * reZo (~gareth@202-180-86-196.callplus.net.nz) has joined #raspberrypi
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[21:14] <pksato> Tagor: a industrial 5V PSU, or ATX PSU.
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[21:18] <pksato> http://www.ebay.com/itm/Industrial-Power-Supply-PSU-Out-5V-20A-100W-IN-90-250V-AC-MODEL-USS100-245-/310772633781?pt=LH_DefaultDomain_0&hash=item485b7e10b5
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[22:17] <Raynerd> gordonDrogon: Thankyou. Yes it was
[22:17] * lord4163 (~lord4163@81-232-61-81-no226.tbcn.telia.com) Quit (Quit: lord4163)
[22:18] <Raynerd> Does anyone use xivley??
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[22:59] <Raynerd> shiftplusone: You about?
[22:59] <shiftplusone> always, Raynerd.... always!
[23:00] <Raynerd> Haha. Just hoping for some advice. You remember the silly twitter thing I was doing. Tweeting the CPU temp?
[23:00] <shiftplusone> yes sir
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[23:01] <Raynerd> Well, I've not got the schools AirPi running. I can not yet rename the channels, I need to figure out how, but this is a constant update of the parameters around school z(currently in my house)
[23:01] <Raynerd> https://xively.com/feeds/1890074463
[23:02] <Raynerd> I appreciate this will be a big task but can you confirm it will be possible, without huge huge skill and effort, to pull those numbers say once every 15 minutes and tweet them.
[23:02] <Raynerd> Or even just a few of them
[23:03] * Tagor (~Tagor@53567E1F.cm-6-7b.dynamic.ziggo.nl) Quit ()
[23:03] <Raynerd> "Temp: Humidity: Light: Pressure: NO2: ". In a tweet. In my head I just don't understand how i will "pull" the numbers
[23:04] * verkgw (~verkgw@146.185.25.138) Quit (Client Quit)
[23:04] <Raynerd> That all being said, the raspberry pi is sending the numbers to xivley so the numbers are already on the pi!
[23:04] <shiftplusone> no idea what an airpi is
[23:04] <shiftplusone> or cively
[23:04] <shiftplusone> *xively
[23:04] <Raynerd> To be honest, it is a add on board, but nothing more than a load of sensors connected to the RasPi!
[23:06] * EggdRop_masteR (~orwell@23.51.12.109.rev.sfr.net) has joined #raspberrypi
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[23:07] <Raynerd> Im use to c and if I had a value it would be stored in variable. Is this the same with python.? In which case, if I have a temp sensor connected to the gpio and it is working... I presume there must be a variable somewhere holding that temp value?
[23:07] * SebSemmi (~SebSemmi@e178207028.adsl.alicedsl.de) Quit (Quit: brb)
[23:08] <shiftplusone> Well, you'll need to create the variable and then write the temp value into it.
[23:08] <shiftplusone> Are you asking about c or python? I am a little lost?
[23:08] <shiftplusone> I don't do python
[23:09] <Nefarious_`AFK> Write a function to obtain the temp, then variable = function()
[23:09] * DK-MODE (~chad@cpc9-slam5-2-0-cust267.2-4.cable.virginm.net) has joined #raspberrypi
[23:09] <shiftplusone> There's probably already a function for that
[23:09] <Nefarious_`AFK> then you're sorted
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[23:09] <shiftplusone> probably a part of rpi.gpio or whatever it's called.
[23:09] <shiftplusone> (if you're using python)
[23:10] * spooq (~spooq@185.16.163.99) Quit (Quit: KVIrc 4.2.0 Equilibrium http://www.kvirc.net/)
[23:10] <Nefarious_`AFK> Rayner's: code?
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[23:10] <Raynerd> One second...
[23:10] <Nefarious_`AFK> Raynerd* even
[23:11] * qrz7 (~pku@ppp-93-104-149-19.dynamic.mnet-online.de) has left #raspberrypi
[23:11] <Raynerd> Nefarious_`AFK: I'm new to pi... This is where I installed code from. cd ~
[23:12] <Nefarious_`AFK> Same :)
[23:12] <Raynerd> Nefarious_`AFK: This is where I installed code from https://github.com/tomhartley/AirPi.git
[23:12] <Raynerd> github.com/tomhartley/AirPi.git
[23:13] <Raynerd> I can't seem to post a link to github
[23:13] * Raynerd (~Raynerd@host86-153-62-12.range86-153.btcentralplus.com) Quit (Remote host closed the connection)
[23:13] <Nefarious_`AFK> Its fine, I'm at the repo
[23:13] * Raynerd (~Raynerd@host86-153-62-12.range86-153.btcentralplus.com) has joined #raspberrypi
[23:13] <Nefarious_`AFK> Brb 5 mins
[23:13] <Raynerd> Nefarious_`AFK: http://airpi.es/step3.php. From bottom of page
[23:14] <Raynerd> So that code is already recording the temperature. I want to capture that and use it in a different script that is already working and posting to twitter
[23:14] <Raynerd> Ok
[23:15] <Raynerd> Is there a good irc client for pi?
[23:15] <Apocope> Raynerd: Define good. I'm using irssi.
[23:15] <sney> there are several good irc clients for linux
[23:15] <Raynerd> Apocope: Thanks. Good - worth downloading
[23:15] <sney> well, "good." depends on what you're comfortable with. irssi, weechat, xchat, are all popular
[23:16] * FR^2 (~fr@farsquare.de) Quit (Quit: und weg...)
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[23:18] <Raynerd> Gone with xchat
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[23:20] <Nefarious_`AFK> So you've got the libs, and you've written your own file using them?
[23:21] <Nefarious_`AFK> I don't really understand, sorry
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[23:21] <Nefarious_`AFK> Nvm
[23:22] <Nefarious_`AFK> I get you now
[23:22] <Raynerd> Nefarious_`AFK: Nothing at all as clever as that. Im a school teacher. We have purchased a airpi and the kids got it going today!
[23:22] <Raynerd> We want to tweet the data
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[23:23] <Raynerd> I used a web tutorial last night to tweet my pi CPU temp. So that works! Now I want to pull across the weather data and tweet it instead which of course was the intention
[23:24] <Raynerd> I have some experience with c from my little engineering projects Raynerd.co.uk but I'm totally lost when it comes to pi! I'm only doing it because they asked and seemed keen!
[23:25] * v0lt_ (~textual@unaffiliated/v0lt/x-7782577) Quit (Quit: gone)
[23:25] * Kane (~Kane@ADijon-257-1-40-100.w86-204.abo.wanadoo.fr) Quit (Quit: Night all o/)
[23:26] <Nefarious_`AFK> Does this seen to be the info you want? (In ""'s) http://pastebin.com/W5RcQgw9
[23:27] <shiftplusone> Raynerd, why not stick to C?
[23:28] <Raynerd> Is pi not all about python. It is all I hear about!
[23:28] <shiftplusone> It's what they push as a good language for beginners
[23:28] <shiftplusone> but you can do it all with C
[23:28] <sney> linux is all written in C for example
[23:28] * airdisa (~airdisa@2602:306:c454:c3b0:c418:188e:fa9c:38f1) has joined #raspberrypi
[23:28] * lupinedk is now known as Lupinedk
[23:29] <Raynerd> Nefarious_`AFK: So how would i capture them - are they global variables held on the entire pi to use in another script??
[23:29] <plugwash> Well the Pi's creator was a python fan.........
[23:29] * Psil0Cybin (~psil0cybi@unaffiliated/psil0cybin) has joined #raspberrypi
[23:30] <plugwash> but that doesn't mean python is the only language you can use or even the best tool for the job at hand
[23:30] <Raynerd> So how can you progrmme in c ?
[23:30] * lansiir is now known as oldtopman
[23:30] * [SkG] (~sconde@unaffiliated/skg/x-897332) Quit (Quit: Saliendo)
[23:30] <Raynerd> On the pi that is!
[23:30] <shiftplusone> Raynerd, as you normally would
[23:30] <Raynerd> No,.. You see all my knowledge is with arduino and microK. When it comes to software ... :(
[23:30] <sney> write programs in C, save them as .c files, compile with gcc. in short.
[23:30] <Nefarious_`AFK> Raynerd, they're local variables from airpi.py, so you can write a function in your file and call it in airpi.py
[23:30] <Psil0Cybin> hey how is everyone here!
[23:31] <shiftplusone> I can't speak for everyone, but I think that on average, we're "fine"
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[23:31] <Raynerd> Psil0Cybin: confused
[23:31] <Psil0Cybin> why is that Raynerd?
[23:32] <Psil0Cybin> shiftplusone: why, be a leader.
[23:32] <Raynerd> I am always confused when ive been on here!
[23:32] <Psil0Cybin> lmao...insomnia?
[23:32] * tombrough (~tom@cpc4-newt3-0-0-cust54.newt.cable.virginm.net) Quit (Ping timeout: 248 seconds)
[23:32] <shiftplusone> Raynerd, as long as the confusion is resolved eventually, that's a good thing =D
[23:32] <sney> '#include <stdio.h> \ int main(){ \ printf("hello world\n"); \ } return 0; ' is all I remember from my C class from 10 or so years ago but that would compile to a program that prints hello world to your screen
[23:32] <plugwash> Raynerd, http://www.debian.org/doc/manuals/debian-reference/ch12.en.html#_c
[23:33] <sney> you can do it too, Raynerd
[23:33] <shiftplusone> Raynerd, a starting point... http://wiringpi.com/
[23:33] * tombrough (~tom@cpc4-newt3-0-0-cust54.newt.cable.virginm.net) has joined #raspberrypi
[23:33] <Nefarious_`AFK> Perhaps let him finish his project in python first
[23:34] <shiftplusone> When he said he was familiar with C... I though he meant he was familiar with C =P
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[23:35] <plugwash> shiftplusone, writing C on microcontrollers is rather differnet from writing C to run on linux
[23:35] <Raynerd> shiftplusone: If you gave me a pic and asked me to write a programme to control a rotary table and run a keyboard to set divisions, i could run a stepper and do it! Software is different
[23:35] <Raynerd> plugwash: Very!
[23:36] * Noodlewitt (~Noodlewit@r49-3-0-137.cpe.vividwireless.net.au) has joined #raspberrypi
[23:36] <plugwash> you can be pretty competent in writing C for microcontrollers while having no clue where to start in writing C to run on linux
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[23:37] <Nefarious_`AFK> Raynerd: do you have an idea of what you need to do now?
[23:37] <Raynerd> Nefarious_`AFK: pastebin.com/CjC3PjvB
[23:37] * trickyhero (~trickyher@d4-50-67-5.try.wideopenwest.com) has joined #raspberrypi
[23:37] <Raynerd> That is sending my output to twitter... I still dont see how to pull the data in there! Even just the temperature for example would be great. How do i pinpoint just one variable...temp or humity.
[23:37] <Raynerd> Humidity,
[23:38] <rikkib> Wooot... Talking to my Navman Jupiter 21 GPS module with minicom... Now I need to get an antenna for it...
[23:38] <shiftplusone> Raynerd, I didn't mean offence my that. 'course bare metal and linux programming is different, but I still think that if you can write code for a microcontroller, jumping to c code for the PC is a better starting point that python. However, if you have started with python already, there's no reason not to continue with python. You're learning either way, and that's good.
[23:38] * Moon_Man (~Moon_Man@CPE1040f39b36f8-CM001868d946e0.cpe.net.cable.rogers.com) has joined #raspberrypi
[23:39] <shiftplusone> *than python
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[23:39] * cave (~cave@gateway/tor-sasl/cave) Quit (Remote host closed the connection)
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[23:40] <Raynerd> shiftplusone: I never take offense !! The issue is the kids hear python and want to use that. I feel i should at least attempt to learn to try and help
[23:40] <shiftplusone> certainly
[23:40] <Raynerd> Pitty the IT department show no interest ;-(
[23:41] <Nefarious_`AFK> I moved from c++ to python
[23:41] * leucos (~leucos@81-65-119-172.rev.numericable.fr) has joined #raspberrypi
[23:42] <Raynerd> Nefarious_`AFK: Any further thoughts or do i need to come back to this. Maybe it is above me. It was just a nice way for parents to see what we were doing
[23:42] <Raynerd> I.e via twitter
[23:42] <Nefarious_`AFK> Raynerd: it's incredibly difficult to type code on a tablet, I'll help tomorrow after school
[23:42] <Nefarious_`AFK> It's not too difficult
[23:42] <Raynerd> That would be great!
[23:43] <Nefarious_`AFK> Just PM me after 5:40
[23:43] <Nefarious_`AFK> I'll be revising beforehand
[23:43] <Raynerd> To be honest, looking at that last pastebin - there is only one line of code as the others lines setup the towtter api and record the cpu temp.
[23:43] <Raynerd> Nefarious_`AFK: WhT you studying?
[23:43] * plugwash wonders if there are any remaining languages that people want to see on the Pi that aren't available yet
[23:43] * Tryn (~Tryn@50.55.89.25) Quit (Disconnected by services)
[23:44] <Nefarious_`AFK> For my GCSEs
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[23:44] <Raynerd> Gcse and you are writing python code... I feel lucky i have 5-10 students even looking at a raspi!
[23:45] <Raynerd> Good on ya!
[23:45] <Nefarious_`AFK> What age range do you teach btw?
[23:46] <Raynerd> 11-18
[23:46] <Nefarious_`AFK> Ah so you teach A level chemistry?
[23:46] <Raynerd> Yup
[23:46] * liamstask (~liam@173-164-164-245-SFBA.hfc.comcastbusiness.net) Quit (Ping timeout: 260 seconds)
[23:47] <Nefarious_`AFK> You are lucky if you have more than 5 people interested heh
[23:47] <shiftplusone> ah... chemistry... I was terrible at it, but it was interesting.
[23:47] <Raynerd> Science y7-9 Chem and Phy y10-11. A level chem only 16-18
[23:47] * dj_pi (~dj@c-107-5-25-243.hsd1.mi.comcast.net) Quit (Ping timeout: 252 seconds)
[23:47] <Nefarious_`AFK> Yeah I picked my a levels yesterday :3
[23:48] <Raynerd> Haha... My explosions normally get attention... Accidental and planned!
[23:48] <Raynerd> Go on...
[23:48] * picca (~picca@2.220.204.70) Quit (Quit: Lingo - http://www.lingoirc.com)
[23:48] <Nefarious_`AFK> Chemistry teachers are the best :P
[23:48] * picca (~picca@2.220.204.70) has joined #raspberrypi
[23:48] <Raynerd> ...some !
[23:48] <Nefarious_`AFK> Maths (& mechanics), Physics, Chemistry, Biology
[23:48] <rikkib> 71% in School certificate science which was second in the whole school that year.
[23:48] <Raynerd> Easy choices then ;-)
[23:48] * liamstask (~liam@173-164-164-245-SFBA.hfc.comcastbusiness.net) has joined #raspberrypi
[23:49] <shiftplusone> Ah, I think physics and maths teachers are the best, but that's mostly because they were the most passionate and inspiring in my school
[23:49] <Nefarious_`AFK> Lol, yeah. Hopefully dropping biology to study chemical engineering.
[23:49] * plugwash regretted not doing physics A level
[23:49] <Raynerd> Sounds good rikkib ! Nearly 3/4 of the way there
[23:49] <Nefarious_`AFK> Urgh, my physics teachers are awful
[23:49] * longbeach (~mike@AFontenayssB-152-1-51-252.w82-121.abo.wanadoo.fr) Quit ()
[23:49] <shiftplusone> that's a shame
[23:50] * Portugol9 (Portugol9@unaffiliated/portugol9) Quit (Ping timeout: 264 seconds)
[23:50] <Raynerd> Physics is tricky to teach and make exciting ... Even the pracs can be dull if not managed correctly
[23:50] <Nefarious_`AFK> Physics is interesting though
[23:50] <Raynerd> Dont get me wrong..it is an awesome awesome subject. Just hard to make awesome!
[23:50] <plugwash> The good thing about doing maths, physics and chemistry A levels is it means you can choose pratically any technical degree
[23:50] <Nefarious_`AFK> Biology is dull
[23:50] <rikkib> Just missed being school dux... Second beaten by a girl in my class
[23:50] <shiftplusone> My physics teacher would always go an extra step and provide some mind blowing information about what was just covered, so it always made the lesson stick and make you want to know more.
[23:51] <Nefarious_`AFK> Lucky you
[23:51] * tombrough (~tom@cpc4-newt3-0-0-cust54.newt.cable.virginm.net) Quit (Ping timeout: 252 seconds)
[23:51] <Nefarious_`AFK> My CERN trip was cancelled :(
[23:51] <Raynerd> What is ths only a level specified by some uni courses??
[23:51] <Raynerd> Why?? Ours our going cern this week i think... Literally!
[23:51] * picca (~picca@2.220.204.70) Quit (Client Quit)
[23:52] <Nefarious_`AFK> Too little people apparently
[23:52] <Raynerd> Or maybe 16th feb rings a bell
[23:52] <Nefarious_`AFK> That's the numbers, not the height hehe
[23:52] * kossy (a@unaffiliated/kossy) Quit (Quit: ZNC - http://znc.in)
[23:53] <Raynerd> Lol
[23:53] <rikkib> CERN collider?
[23:53] <Raynerd> Yep
[23:53] <Raynerd> Most a level physics department run a trip
[23:53] <rikkib> Now that is a machine
[23:55] <Nefarious_`AFK> Besides, I'm off to bed. Goodnight/Morning/Whatever
[23:55] * GenBurnside (~GenBurnsi@12.150.118.194) Quit (Quit: Leaving)
[23:56] <rikkib> Wish I when to school now... In the 70's it was to regimented... I went to the principle and asked to do all the science classes but they would not let me. So I literally gave up trying... Needed all science subjects to do Uni.
[23:56] * Raynerd (~Raynerd@host86-153-62-12.range86-153.btcentralplus.com) Quit (Quit: Raynerd)
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