#raspberrypi IRC Log


IRC Log for 2019-02-26

Timestamps are in GMT/BST.

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[0:06] <toastintheshell> anyone get zram working on the rpi? I'm getting some errors when I try it
[0:07] <larsks> toastintheshell: what sort of errors?
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[0:10] <toastintheshell> /usr/bin/zram.sh: line 12: /sys/block/zram1/disksize: No such file or directory
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[0:10] <toastintheshell> mkswap: cannot open /dev/zram1: No such file or directory
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[0:11] <toastintheshell> swapon: ...same... etc., stuff like that, I think it has to do with the fact that it's on berryboot
[0:13] <toastintheshell> I think berryboot sort of takes over in some of the system startup stuff, seems like there's a mix between berryboot (which I think is just a stripped down raspbian from the looks of it), and the 'guest' operating system
[0:16] <toastintheshell> seems like berryboot images can't be overclocked either as far as I can tell
[0:16] <toastintheshell> although all of that might be possible on the 'host' berryboot OS potentially (that's what I'm hoping)
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[0:20] <toastintheshell> I'm not sure how it all works, it's really interesting though, bb inserts its own wpa_supplicant and various other configuration files into the guest (seems like only some images are willing to 'accept' these configs for whatever reason), so you can have dozens of installs on the same card without having to set up the wifi ssid/psk, keyboard config, etc.
[0:21] <toastintheshell> you can drop to a shell from the menu screen, so I think I might reboot and poke around
[0:22] <toastintheshell> back in a bit
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[1:45] <toastintheshell> so I probably should have done this first, but I'm gonna have a look at berryboot's documentation
[1:47] <toastintheshell> looking at the base filesystem it's interesting that a lot of the files from each OS reside on the berryboot filesystem, then they're all mixed together with the 'guest' image once it boots into an image
[1:47] <toastintheshell> in a weird sort of mishmash that I guess varies from OS to OS
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[1:55] <toastintheshell> but it does look feasible to enable zram from the initial berryboot image
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[2:14] <zylinx> anybody here use openALPR on a Pi before ?
[2:14] <zylinx> I am wondering if it is capable of processing a video stream from the pi camera, instead of stills
[2:15] <zylinx> from what I see on google, people are struggling to get that to work ?
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[2:30] <_unreal_> hello
[2:30] <_unreal_> does anyone in here use asus tinkerboards?
[2:31] <toastintheshell> _unreal_: no but I'd like to try one
[2:31] <toastintheshell> have you?
[2:32] * basteh (~basteh@unaffiliated/basteh) Quit (Read error: Connection reset by peer)
[2:33] <_unreal_> I have one
[2:33] <_unreal_> I'm typing slow tonight hulk smashed own finger good today
[2:33] <Jigsy> I wonder if there'll be a new Rpi for Pi Day.
[2:33] <toastintheshell> lol, damn sorry to hear that
[2:33] <_unreal_> me to
[2:33] <toastintheshell> Jigsy: I've been hearing no new rpi for 2019 :'(
[2:33] <_unreal_> I have a black and blue under my nail and ON the other side of my left middle finger
[2:34] <Jigsy> I see...
[2:34] <toastintheshell> that would be a fantastic surprise though
[2:34] <_unreal_> toastintheshell, smashing my finger was a fantastic suprise
[2:34] <_unreal_> monkey wrenched it
[2:34] <toastintheshell> yeah, we're stuck back in USB2/FastEthernet days for another 10 months at least
[2:34] <_unreal_> toastintheshell, if you get a tinker board
[2:35] <_unreal_> MAKE SURE you get a power supply that provides it 5.3V
[2:35] <_unreal_> trust me
[2:35] <_unreal_> 5.0 5.1-2 WONT AND IT will have boot issues
[2:35] <toastintheshell> so you let the magic smoke out?
[2:35] <_unreal_> no
[2:35] <toastintheshell> oh good
[2:35] <_unreal_> 5.6 is the limit for usb
[2:36] <_unreal_> just the thinker has a micro usb.. that 5v 1.8A max
[2:36] <_unreal_> for supply STUPID
[2:36] <_unreal_> so you power via the GPIO and use a supply that can do 5.3 and it will NEVER EVER EVER give you boot issues
[2:36] <_unreal_> EVER
[2:36] * Mibix (~Mibix@d149-67-133-59.try.wideopenwest.com) has joined #raspberrypi
[2:37] <_unreal_> reg. 5v supply and youll plus the thing 2-7 times before it boots EVERY time
[2:37] <_unreal_> plus=unplug and plug
[2:38] <_unreal_> I have a pi and a tinker and the tinker just CRUSHES the pi. I mean BAD.....
[2:38] <_unreal_> when it comes to gaming etc... and raw power desktop apps etc....
[2:38] <toastintheshell> oh well, ship it, nobody cares about this diy crap anymore anyway
[2:38] <toastintheshell> that's what I imagine the asus people saying
[2:38] * tdy2 (~tdy@unaffiliated/tdy) Quit (Ping timeout: 246 seconds)
[2:38] <_unreal_> toastintheshell, I have the castle power supply
[2:39] <_unreal_> few of them to be honist
[2:39] <_unreal_> http://www.castlecreations.com/en/cc-bec-010-0004-00
[2:39] <_unreal_> only down fall is you have to have the programmer to change the voltage setting
[2:39] <_unreal_> but I do a lot of drone QUAD copter stuff.. :)
[2:41] <_unreal_> that thing takes like 9-25V dc input and outputs 4.7 or 8 to 9v in 1/10 adjustments
[2:41] <toastintheshell> what's "the programmer"? some kind of magical attribute you can acquire as you develop xp?
[2:42] <_unreal_> http://www.castlecreations.com/en/castle-link-v3-usb-programming-kit-011-0119-00
[2:42] <toastintheshell> oh it's an rc power supply?
[2:43] <_unreal_> ya
[2:43] <toastintheshell> did you come up with that idea, or did someone else think to try that?
[2:43] <_unreal_> I do drone stuff
[2:43] <toastintheshell> oooh
[2:43] <_unreal_> radio controlled hobby etc....
[2:44] <_unreal_> I have thousands of $ in RC product that I have :) wasted my money on
[2:44] <_unreal_> That think was too perfect
[2:44] <_unreal_> thing
[2:44] <toastintheshell> nice, so this thing gives it a more reliable and exact voltage?
[2:45] <_unreal_> the tinker has a HUGE power draw during boot. and browns out
[2:45] <_unreal_> so up the voltage by a tiny bit.... and you over come the supply issue
[2:45] <_unreal_> volts/amps
[2:45] <_unreal_> WAY more
[2:46] <_unreal_> you can power it via the micro usb but its a waste of time I power mine via the gpio header
[2:46] <_unreal_> brb F'ing dog wants to go out
[2:46] <toastintheshell> that is absolutely ridiculous they would put that product out and not make it work with the thing it's designed to work with
[2:46] <toastintheshell> that thing being the thing that makes the whole thing work
[2:49] * sublevel (~sublevel@gateway/tor-sasl/sublevel) Quit (Remote host closed the connection)
[2:49] <_unreal_> yep
[2:50] <_unreal_> thats why the responce to using theem has been slow/poor
[2:50] <toastintheshell> Can you power the rpi from anything but usb?
[2:50] <_unreal_> IMO the original tinker is amazing
[2:50] <_unreal_> $50
[2:50] <toastintheshell> what's the specs?
[2:50] <_unreal_> 2x EVERYTHING over the pi
[2:51] <_unreal_> quadcore 1.8ghz 2g ram, more GPIO optins
[2:51] <_unreal_> options
[2:51] <_unreal_> the list goes on
[2:51] <_unreal_> the tinker 2 has onboard EMMC 16gb
[2:51] <toastintheshell> oh nice
[2:51] <_unreal_> tinker board (S)
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[2:52] <toastintheshell> have you looked much into any other boards?
[2:52] <_unreal_> but if you look at the spec's the tinker on average for processing is about 2X a pi
[2:52] <_unreal_> a little
[2:52] <toastintheshell> why do I never hear about the beaglebone anymore, seems like that was all the rage like 5 years ago
[2:52] <_unreal_> but $ was a factor in my decition... not MONEY just purchasing the choice computer...
[2:52] <_unreal_> likely because its a thumbs down CPU SBC
[2:53] <_unreal_> its on par the the PI
[2:53] <_unreal_> and the PI is weak
[2:53] <akk> toastintheshell: The beaglebone never got much community behind it for some reason. Maybe because it was a bit more expensive.
[2:53] <toastintheshell> lol, well isn't it supposed to have less unfree blobs in it?
[2:53] <akk> (too bad, it was a nice board)
[2:53] <_unreal_> high price low support=death
[2:54] <_unreal_> tinker has very price medium support=treading water
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[2:54] <_unreal_> verable
[2:54] <akk> And yeah, it was all free, plus it did some hardware stuff better than the pi (like serial).
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[2:54] <_unreal_> akk, and the cnc stuff
[2:54] <toastintheshell> yeah, sucks when competition dies, we obviously need to light a fire under these rpi people somehow to put out an updated version
[2:55] * Conino (~Conino_@ Quit (Ping timeout: 255 seconds)
[2:55] <_unreal_> toastintheshell, likely they have drown them selves in stock of pi 3b+
[2:55] <_unreal_> and want to sell it off before passing out an upgrade
[2:56] <akk> Wish they'd sell more 0 and 0w.
[2:56] <_unreal_> and if people are HOT caking a product why produce an upgrade or at least bring to market
[2:56] <_unreal_> 0-0w?
[2:57] <akk> _unreal_: Pi zero, pi zero w?
[2:57] <_unreal_> oh
[2:57] <_unreal_> I jus got my rpi3b+ in the mail yesterday
[2:57] <toastintheshell> the thing that keeps me on the rpi though is all the community/support, there's just hundreds and hundreds of operating system images alone supported for the rpi, there's a ton of software, a ton of people knowledgable about it out there, if I google how do I x y and z on a raspberry pi, chances are the autocomplete will get to the end of the question before I get to y
[2:57] <_unreal_> I only got it for desting stuff
[2:57] <_unreal_> toastintheshell, for all the support I cant find SHIT for what I'm looking for
[2:58] <akk> Same here, toastintheshell.
[2:58] <_unreal_> pardon my spanish
[2:58] <toastintheshell> _unreal_: sounds about right (drowning in stock), they seem to be mainly focused on building brick and mortar stores in England to get rid of it all
[2:59] <_unreal_> hehe you know well for USA based... I'd give anyone an RPI shell who can fix my tinkerboard software issues
[2:59] <toastintheshell> I get they want to stick to their roots and keep it at $35, but give me a freakin "pro" option or something for $50/$75/$100 (something comparable at least to the tinkerboard?)
[2:59] <_unreal_> https://drive.google.com/open?id=1Rd4__AhurmXlam7M9dkPl3FW6Fd86syu
[3:00] <_unreal_> https://drive.google.com/open?id=1kPtps_VMSsQqWfIx5baqdu2rawGrnZwf
[3:00] <_unreal_> https://drive.google.com/open?id=1QkWgHpnCRs6qtWHWWXF8qHhw2aM0cW4l
[3:00] <toastintheshell> akk: you don't know about the pi zeros?
[3:00] <_unreal_> toastintheshell, I'm sure he knows about the zero
[3:01] <akk> toastintheshell: _unreal_ may not. I wrote a book about the 0w. :)
[3:01] <akk> (also, not a he, _unreal_)
[3:01] <toastintheshell> oh lol, I got excited for a second
[3:01] <toastintheshell> akk: what book?
[3:02] <akk> toastintheshell: http://shop.oreilly.com/product/0636920115472.do ... really just a mini book.
[3:03] <_unreal_> not a he?
[3:04] <_unreal_> was feeding damn dog
[3:04] <_unreal_> hate that dog fam love dot....
[3:04] <_unreal_> I drink
[3:04] <_unreal_> :)
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[3:05] <toastintheshell> akk: what's your background that makes you such a sagely pizero master?
[3:06] * tommy`` (~UPP@unaffiliated/tommy/x-6566540) Quit (Disconnected by services)
[3:06] <_unreal_> you two look at my images?
[3:06] <_unreal_> google drive links?
[3:07] <akk> toastintheshell: heh, I'm not really. I have some experience with pi and lots with python, and also writing experience, and O'Reilly needed someone who could do a jumpstarting book quickly.
[3:07] <toastintheshell> hm, my clipboard is... complicated
[3:08] <toastintheshell> can you maybe shorten the urls a bit? lol
[3:08] <toastintheshell> akk: I don't think I've ever been disappointed with any oreilly book (and I've read quite a lot of them)
[3:09] <toastintheshell> solid-ass publisher
[3:09] <_unreal_> akk, how is your linus?
[3:09] <_unreal_> linux
[3:09] <_unreal_> @#%$@#%# finger
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[3:09] <_unreal_> akk my issues is I need to get the tinker setup with linux running RT some kind of real time... linuxcnc and the GPIO setup to work like a prallel port.....
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[3:10] <_unreal_> I would never buy a book from an ass publisher even if it is solid :)
[3:10] <toastintheshell> well it's better than liquid-ass
[3:11] <akk> I hadn't used a pi 0w before (they had just come out and were hard to get) but I'd done a bunch of little projects with older pis.
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[3:12] <toastintheshell> if they could make a 3b+ circuitry on something like the 0's formfactor I'd be delighted
[3:12] <akk> The gas-ass ones don't have a lot of content but they don't weigh down your pack so much.
[3:13] <_unreal_> akk I was published with the Jackson Lab www.jax.org for a project I did with them
[3:14] <akk> I usually don't need a lot of CPU speed for the stuff I do, I care more about power use and price (and small size is nice too).
[3:14] <toastintheshell> lol, we should start calling ebooks that
[3:14] * superprower (~superprow@ Quit (Ping timeout: 245 seconds)
[3:14] <toastintheshell> or only if they're in the cloud
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[3:16] <toastintheshell> akk: would you happen to know what kind of performance tradeoff I can expect between say, a 16piZero cluster, and a 4pi3B+ cluster?
[3:17] <_unreal_> toastintheshell, your major differnce is memory
[3:17] <_unreal_> not cpu
[3:17] <akk> toastintheshell: Not a clue, sorry. But of course it would also depend on what you were running, how well parallelized it was.
[3:17] <toastintheshell> probably kubernetes
[3:17] <toastintheshell> unless something better comes on my radar
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[3:19] <toastintheshell> I can't find anything online about people running it on zeros, I'm wondering if that's just lack of visibility for them or because of performance
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[3:21] <toastintheshell> but they're $5 a pop where I am right now at microcenter, so if 4 zeros can be made to work as well as 1 3B+s, that'd be a better option cost-wise
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[3:22] <akk> Wistful sigh, wish I had a local microcenter.
[3:22] <Rickta59> I'm looking at getting a rpi 3b+ .. any thoughts on the "official" 2.5A power supply by StronTronics? t5989dv?
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[3:23] * Budgii_AFK (~Budgii@unaffiliated/budgii) Quit (Ping timeout: 264 seconds)
[3:24] <Rickta59> to be honest i've been powering my rpi 2 with 1 A samsung charger without any issues ( i use a powered hub and a external laptop usb hard drive)
[3:24] * Budgii_AFK (~Budgii@unaffiliated/budgii) has joined #raspberrypi
[3:24] <akk> Most of the time you can get away with underpower, but it's a drag if you suddenly do something that needs more.
[3:25] <Rickta59> whenever I know I'm going to use power I either power it externally or plug it into the powered hub
[3:26] <Rickta59> i was just wondering about the plug system .. seems kind of weird
[3:26] <toastintheshell> akk: they know me a little too well there, it's like my disneyland
[3:26] <Rickta59> the way the different country adapters slide in
[3:26] <_unreal_> Rickta59, I'd just get a kit
[3:27] <Rickta59> what does that offer?
[3:27] * T3RM1N41 (~73rm1n41@2604:2d80:800d:9294::1001) has joined #raspberrypi
[3:27] <_unreal_> pi, case, psu, sd, etc...
[3:27] * T3RM1N41 (~73rm1n41@2604:2d80:800d:9294::1001) Quit (Read error: Connection reset by peer)
[3:27] <_unreal_> everything in one package average about 50 USD
[3:27] <Rickta59> 3d printer for case .. going to use a usb drive
[3:27] <_unreal_> Rickta59, baaaa
[3:28] <toastintheshell> I have read you can damage the sdcard with underpowered/overclocked pis, can a non-overclocked pi be corrupted with too little power?
[3:28] <_unreal_> https://www.amazon.com/gp/product/B06XHKSVTG/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1
[3:28] <Rickta59> i have a bunch of unused laptop ps i could use with one of the buck boost converters i have if don't buy the "official"
[3:28] <Rickta59> arduino?
[3:28] <_unreal_> Rickta59, you use THAT with a PI and you have a 3d printer
[3:29] <Rickta59> yeah wasn't asking that thanks
[3:29] <_unreal_> that is a controller MOTOR controller
[3:29] <_unreal_> and just needs a computer
[3:29] <_unreal_> 3d printer base right there
[3:29] <Rickta59> i'd rather use my stm32 bluepills
[3:29] <_unreal_> you said 3d printer
[3:29] <Rickta59> i meant i don't need a case i have a 3d pritner
[3:29] <_unreal_> I see you took the blue pill instead of the red
[3:30] <Rickta59> tbh i have a pile or both
[3:30] <_unreal_> so how did isthe rabit hole :)
[3:30] <toastintheshell> now that sounds like a party
[3:30] <Rickta59> when i want to be blissful i use the red ones
[3:30] <_unreal_> bliss is good
[3:30] <Rickta59> https://i.imgur.com/LutP12b.jpg
[3:30] <_unreal_> Rickta59,
[3:31] <_unreal_> _unreal_> https://drive.google.com/open?id=1Rd4__AhurmXlam7M9dkPl3FW6Fd86syu
[3:31] <_unreal_> <_unreal_> https://drive.google.com/open?id=1kPtps_VMSsQqWfIx5baqdu2rawGrnZwf
[3:31] <_unreal_> <_unreal_> https://drive.google.com/open?id=1QkWgHpnCRs6qtWHWWXF8qHhw2aM0cW4l
[3:31] <_unreal_> that aint a knife... thats a knife
[3:31] <Rickta59> nice
[3:31] <_unreal_> I have the molds
[3:31] <_unreal_> :)
[3:32] <Rickta59> is that what a minitel looks like?
[3:32] <_unreal_> its just a case I desgned for RPI
[3:32] <_unreal_> I make them out of fiberglass
[3:32] <_unreal_> very light very VERY strong
[3:32] * slv (~slv@ Quit (Quit: Leaving)
[3:32] <Rickta59> seems like you should have put it in a pie pan :)
[3:33] <Rickta59> anyways ... maybe i'll just skip the ps
[3:33] <_unreal_> I should update my photos.
[3:33] <_unreal_> the current one has a lot more features
[3:33] <_unreal_> fans in it. hardware mounted
[3:33] <_unreal_> rubber feed
[3:33] <_unreal_> feet
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[3:36] * CarlFK (~carl@96-90-87-41-static.hfc.comcastbusiness.net) has joined #raspberrypi
[3:36] * pixel_yo (~pixel_yo@unaffiliated/pixel-yo/x-3847297) Quit (Quit: The Lounge - https://thelounge.github.io)
[3:37] <toastintheshell> Rickta59: oh that case is nice, you design it?
[3:38] * akk (~akk@ Quit (Quit: +++)
[3:38] <toastintheshell> _unreal_: when you update your photos, you should post one to imgur so I can type the url more easily until I figure out how to make copy/paste work on this klugey setup
[3:38] * pixel_yo (~pixel_yo@unaffiliated/pixel-yo/x-3847297) has joined #raspberrypi
[3:38] * BenderRodriguez (~TaxDodger@unaffiliated/foxhoundz) Quit (Ping timeout: 255 seconds)
[3:40] <toastintheshell> how'd you learn to make those molds anyway, you use a tutorial?
[3:40] * magic_ninja (~sparie1@unaffiliated/magic-ninja/x-4708782) Quit (Read error: Connection reset by peer)
[3:42] <Rickta59> no that is just from thingiverse.com toastintheshell
[3:42] * magic_ninja (~sparie1@unaffiliated/magic-ninja/x-4708782) has joined #raspberrypi
[3:43] <Rickta59> https://www.thingiverse.com/thing:922740 toastintheshell
[3:43] * TheSin{Ti} (~TheSin@d162-157-155-78.abhsia.telus.net) has joined #raspberrypi
[3:43] <Rickta59> or something like that .. it was a long time ago
[3:44] <toastintheshell> _unreal_: definitely liking the idea of a fiberglass mold for my cluster-pi laptop
[3:44] <toastintheshell> Rickta59: what printer did you use?
[3:44] <Rickta59> a lulzbot mini
[3:45] <toastintheshell> I wonder if the hackerspace I used to go to has a lazer cutter yet
[3:45] <friendofafriend> Hey, those turned out good!
[3:46] * TheSin (~TheSin@d199-126-164-61.abhsia.telus.net) Quit (Ping timeout: 255 seconds)
[3:47] * benin (~benin@ Quit (Ping timeout: 246 seconds)
[3:47] <toastintheshell> but they did have I think a lulzbot and some other printer
[3:50] <toastintheshell> _unreal_: sorry to backtrack but earlier you said memory would be a bigger factor in cluster performance than cpu, can you elaborate? I presume that means 512mb*4 pizeros would be > the 1gb*1pi3b+
[3:50] <friendofafriend> You're running the OS four times over.
[3:51] * fredp (~fredp@unaffiliated/fredp) has joined #raspberrypi
[3:52] * null1337 (~WhoAmI@c-73-203-123-117.hsd1.co.comcast.net) Quit (Quit: Relax, its only ONES and ZEROS!)
[3:52] <toastintheshell> right, but if anything less than half of the memory overhead is used by each node, would that not still be better?
[3:52] <toastintheshell> of course it's 4x the network overhead too
[3:52] * null1337 (~WhoAmI@c-73-203-123-117.hsd1.co.comcast.net) has joined #raspberrypi
[3:54] <toastintheshell> I'm thinking mostly zeros with usb networking to keep from too much wifi interference
[3:54] <toastintheshell> unless I can figure out a comparably fast/low-resource-using way of doing it over the wire
[3:56] <friendofafriend> You'd be better off using multi-core SBCs in the first place.
[3:56] <toastintheshell> seems like gpio doesn't have any way of doing fast enough networking to use instead of usb that I can figure out
[3:57] <friendofafriend> I'd probably go after a RockChip or Exynos-based board. If all you're after is CPU, that's the move.
[3:57] <Rickta59> what are you going to do with a rpi cluster toastintheshell ?
[3:57] <toastintheshell> friendofafriend: so you say 4 pizeros are not as good as 1pi3 in a cluster?
[3:57] <friendofafriend> I would not use Pi Zeros for that.
[3:57] <Rickta59> zeros are dog slow
[3:57] <toastintheshell> kubernetes cluster, trying to get lots of pis run a single linux image
[3:57] <Rickta59> and a single core
[3:58] <toastintheshell> Rickta59: so 4 pi3s would make a better cluster than 16 zeros?
[3:59] <Rickta59> well the pi3s has a more modern / efficient / power cores
[3:59] <Rickta59> not knowing anything about kubernetes I can't say how it takes advantage of multiple cores
[4:00] <Rickta59> more devices == more opportunities for things to fail
[4:00] <friendofafriend> toastintheshell: Yes, and you'd be better off with fewer SBCs with more cores.
[4:00] <toastintheshell> the OS/network overhead is higher, but there is twice as much ram (granted with 4 times the overhead, but that might turn out to still be more memory if it's less than half the total ram usage)
[4:00] <Rickta59> seems like an intel board with 8 cores would kick either rpi solutions' butt
[4:01] <friendofafriend> Of course it would, but likely not for the price.
[4:01] <Rickta59> the big bottleneck in the pi is both the network and the usb
[4:01] <toastintheshell> Rickta59: well kubernetes is designed to dynamically drop/add nodes as they fail or come online, so the failure of one shouldn't be too much of an issue
[4:01] <friendofafriend> Check out the ODROID line for that, Rickta59.
[4:02] <toastintheshell> the price and ease of replaceablility is what I'm interested in, and I am going with the rpi now because of all the support and knowledgable people out there familiar with the hardware
[4:03] <friendofafriend> You can get more for less, in terms of memory speed and CPU performance.
[4:03] <toastintheshell> if I get it working on the rpi I will probably eventually try it on something more powerful
[4:04] <friendofafriend> A big attraction of the Pi3 is being able to boot over Ethernet, for sure.
[4:04] <friendofafriend> So instead of adding the cost of storage media into every node, you can save that and buy more nodes.
[4:05] * password2 (~password@unaffiliated/password2) has joined #raspberrypi
[4:05] <friendofafriend> I've got some power supplies that will do 150W of 5V.
[4:05] <Rickta59> fireworks controller?
[4:05] <toastintheshell> friendofafriend: booting over ethernet is definitely something I'd like to try for the cluster, would make things a lot easier to manage once it's set up
[4:07] <Rickta59> this is just a personal project toastintheshell ?
[4:07] <toastintheshell> 3b+ hovers around 1 amp, right?
[4:08] <toastintheshell> Rickta59: yeah just screwing around
[4:08] <friendofafriend> Something like that, 2.5A power supply is recommended.
[4:09] <toastintheshell> what's the highest a non-overclocked pi3 will draw with an ethernet cable and nothing else plugged in?
[4:10] <toastintheshell> does it get anywhere near 2 amps?
[4:11] * CrazyEddy (~CrazyEddy@wrongplanet/CrazyEddy) has joined #raspberrypi
[4:12] <toastintheshell> Rickta59: I've always wondered about the practicality of running a beowulf cluster as a personal desktop
[4:12] <friendofafriend> Nah, GPU is important.
[4:13] <toastintheshell> important for what?
[4:14] <friendofafriend> You could get by with a pretty recent GPU and a CPU from years ago. That is to say, desktops are more about GPUs than CPUs.
[4:15] <friendofafriend> There are people here using the Pi3 as a desktop replacement, and that seems to be a struggle.
[4:16] <friendofafriend> My desktop is basically CPU idle, everything is running on a server or some SBC.
[4:19] <toastintheshell> yeah, well I have a very nice, pretty recent, very expensive laptop, but I didn't get to build and design it, and it's not made of lots of computers :/
[4:21] <toastintheshell> but really the goal of the project isn't to prove that current technology as it exists now allows for a cheaper faster better desktop made of a bunch of rpis, it's to more to see how good the rpi currently is for that purpose and what it would require for it to become a serious option in the future
[4:23] <toastintheshell> also equally as much I just find it interesting and want to learn about cluster computing/operating systems/rpis/etc.
[4:24] * bikram (~bikram@ has joined #raspberrypi
[4:24] <friendofafriend> Take a look at some of the new RK3399 boards with PCIe, and bring your own video card. I've seen some demos of x86 and ARM SBCs with PCIe doing just that, and it's amazing.
[4:25] * Neros (~Neros@31-32-241-72.abo.bbox.fr) Quit (Quit: Ping timeout (120 seconds))
[4:26] * Neros (~Neros@31-32-241-72.abo.bbox.fr) has joined #raspberrypi
[4:26] <toastintheshell> wouldn't it be nice if a node went down and I could run to microcenter and have it replaced in 45 minutes (including some time to peruse of course)... or not, maybe I don't need it right now, since it runs fine without one less node...
[4:26] * redstarcomrade (~quassel@cpe-104-175-255-182.socal.res.rr.com) Quit (Read error: Connection reset by peer)
[4:26] * nighty- (~nighty@b157153.ppp.asahi-net.or.jp) has joined #raspberrypi
[4:27] <toastintheshell> for the price of a cup of starbucks in the expensive part of town
[4:27] <friendofafriend> Or figure out your normal load and have some hot spares, maybe?
[4:27] <friendofafriend> Don't get me wrong, I'd love to see more SBCs in Microcenter or Target. I can get a 3B here in under an hour.
[4:28] <toastintheshell> yeah, plus you could have a backup master ready to jump in just doing nothing but constantly mirroring the primary master... or 4 backups if you want
[4:29] <friendofafriend> Even if you make a cluster of Pi3s, there's nothing keeping you on that platform going forward. When the price-to-performance changes, it makes sense to follow.
[4:29] <toastintheshell> of course not, it's just much more convenient
[4:30] <friendofafriend> If anything, switchports would probably start chewing at you.
[4:30] <friendofafriend> You know, $40 a board, and another $10-$20 for the switchport. :\
[4:31] * ball (~ball@99-60-12-181.lightspeed.cicril.sbcglobal.net) has joined #raspberrypi
[4:31] <toastintheshell> one of my thoughts in trying this was regarding third world conditions, where maybe you don't have any machines around that can do anything too useful, whereas you might have 6 old ones gathering dust that nobody wants
[4:32] <ball> toastintheshell: Sounds like a manufactured use case to me. ;-)
[4:32] <toastintheshell> yeah well I'm also planning on studying for the ccna soon, so I was going to buy some cisco switches anyway
[4:33] <ball> Bear in mind that I just joined the channel. I don't even know what you're building.
[4:33] <toastintheshell> ball: this is america, I can imagine whatever I want to be the case is true and nobody's allowed to question it
[4:33] <friendofafriend> Throw a bald eagle at this naysayer, toastintheshell.
[4:34] * fredp (~fredp@unaffiliated/fredp) Quit (Ping timeout: 244 seconds)
[4:34] <toastintheshell> pi cluster + kubernetes (or some clustering layer with similar functionality) + linux distro running on a bunch of pis
[4:34] <toastintheshell> this guy hates america!
[4:34] * ball readies his cricket bat.
[4:35] <ball> Oh right. I have considered building a small cluster of Raspberry Pi boards
[4:35] <ball> ...even manufactured my own use case for it. ;-)
[4:35] <ball> I'd like three Raspberry Pi 2B and one 3B+
[4:35] <ball> ...one five-port 100baseTX switch
[4:35] <toastintheshell> you're not going to talk me out of an interesting project with all this talk of more practical solutions to the problem, because my only problem is that I want to build a raspberry pi cluster that runs linux, and I don't have one yet
[4:36] <ball> ...and one five port 60W USB PSU
[4:36] <friendofafriend> ATX power supply for your 5V needs makes a lot of sense.
[4:36] <ball> toastintheshell: Thing is, that's valid. You don't have to make up an excuse.
[4:36] <ball> I would like to build one because I would like to have one to potch with.
[4:37] <hodapp> I'd like to build one to get the approval of people who like to check to make sure that everything I do is practical.
[4:37] <friendofafriend> I spurged out to this Raspi cluster. https://www.rs-online.com/designspark/a-pi-powered-plan-9-cluster
[4:37] <toastintheshell> ball: but the excuses are part of the fun
[4:37] <ball> I'd like one. Sadly I can't afford it.
[4:37] <hodapp> plan 9 is super cool
[4:37] <hodapp> ...to think about
[4:37] <hodapp> and then ignore
[4:38] <_unreal_> i'm back
[4:38] <_unreal_> had to feed my daughter and put her to bed and help.... with.... home.... work.....
[4:38] <_unreal_> bang......
[4:38] <friendofafriend> Lucky dog.
[4:39] <_unreal_> toastintheshell, you want minimum 1gb for per pi unit in a cluster
[4:40] <_unreal_> other wise you are running cluster nodes at the limit of there function on limited resources
[4:41] <_unreal_> ddoes not make munch sense... think of it like having a bunch of old win98 computers running pentium 60's and 24mb ram each..... and saying they are a cluster....
[4:41] <_unreal_> I'm just saying you want to overcome the ram issue in the cluster
[4:41] <ball> I have a pallet full of dual-core i5 desktops that I'm not using.
[4:41] <_unreal_> REALLY!
[4:41] <ball> I fear we may end up recycling those
[4:41] <_unreal_> ball, you live in he USA?
[4:41] <toastintheshell> hold on, so did they build 4 pis running plan 9 separately, or...
[4:42] <friendofafriend> toastintheshell: Plan9 is basically cluster-ready.
[4:42] <_unreal_> ball?
[4:42] <toastintheshell> _unreal_: that makes sense, I figured the zeros would be too much overhead
[4:43] <toastintheshell> ball: can I have them?
[4:43] <ball> _unreal_: yes.
[4:43] <_unreal_> toastintheshell, I'm not saing they cant I'm just saying if you give an extreme example it shows the issue easy
[4:43] <ball> It seemed like a good idea at the time.
[4:43] <toastintheshell> oh man, maybe I'll just switch to plan9
[4:44] <_unreal_> ball can you sell any of them/
[4:44] <_unreal_> ?
[4:44] <toastintheshell> ball: how did such a thing come to transpire?
[4:44] <toastintheshell> they made a dualcore i5?
[4:44] <ball> toastintheshell: I have a stream of machines coming back from the field. If it's quad-core with a Windows 10 license, I wipe it, test it, reimage it and send it back out.
[4:45] * ssmultron (~smultron@mirbsd/staff/smultron) Quit (Ping timeout: 268 seconds)
[4:45] <ball> ...anything without a Windows 10 license either goes into the ewaste dumpster or onto the pallet, if I deem it worthy.
[4:45] <_unreal_> ball can you sell any of them/
[4:45] <toastintheshell> nice, wipe windows and send back with plan9?
[4:45] <ball> _unreal_: I doubt I could sell them without Windows.
[4:45] <ball> toastintheshell: I put Xubuntu on them. ;-)
[4:45] <_unreal_> I run linux
[4:45] <_unreal_> I'm on fedora
[4:46] * Klaus_D1eter_ (~klaus@x590ea22d.dyn.telefonica.de) has joined #raspberrypi
[4:46] <_unreal_> uname
[4:46] <toastintheshell> -a
[4:46] <_unreal_> Linux localhost.localdomain 4.20.7-200.fc29.x86_64 #1 SMP Wed Feb 6 19:16:42 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[4:46] <_unreal_> I dont know why it didnt copy everything
[4:46] * ssmultron (~smultron@mirbsd/staff/smultron) has joined #raspberrypi
[4:46] <_unreal_> something wierd with fedora 29 I have to ctrl+shift+c twice or it only copys the first line
[4:47] * magic_ninja (~sparie1@unaffiliated/magic-ninja/x-4708782) Quit (Read error: Connection reset by peer)
[4:47] <ball> toastintheshell: Mostly i5 or i3
[4:47] <ball> (dual-core)
[4:47] <_unreal_> ball, SOOOO can you sell them or not
[4:47] <ball> I have a few quad-core chips too.
[4:47] <_unreal_> I'm interested in themachine less the win10
[4:47] <ball> _unreal_: Probably not. I'll have to see whether I can find a school district that'll take them.
[4:47] <_unreal_> and are you in USA?
[4:47] <ball> If not, into the dumpster with 'em.
[4:47] <_unreal_> school?
[4:48] <toastintheshell> please make a cluster
[4:48] <toastintheshell> but then the issue of power consumption becomes real
[4:48] <toastintheshell> brb, dogs gotta doo
[4:48] <_unreal_> I use to do work for a guy who did materials salvage and he got a LOT of computers...and he always told me EWASTE was a rip off
[4:49] * magic_ninja (~sparie1@unaffiliated/magic-ninja/x-4708782) has joined #raspberrypi
[4:49] * Klaus_Dieter (~klaus@x590e902e.dyn.telefonica.de) Quit (Ping timeout: 244 seconds)
[4:49] * Klaus_D1eter_ is now known as Klaus_Dieter
[4:49] <_unreal_> he could make 10x the income per unit selling off "old" comptuer hardware as a computer then he could scraping them for materials.... gold. silver copper etc....
[4:50] <ball> _unreal_: They're charging us to haul them away.
[4:51] <ball> :-/
[4:51] <_unreal_> as i said its a total scam
[4:51] <_unreal_> most of those ewaste places salvage the computer for usable parts
[4:51] <ball> _unreal_: They won't get many out of the ones I just scrapped. ;-)
[4:51] <_unreal_> and ship off the left overs to china where the rest gets taken apart. down to the screws
[4:53] <ball> _unreal_: Where in the U.S. are you?
[4:53] <_unreal_> south florida baby
[4:53] <ball> Ah, shipping would be prohibitive then. We're in Illinois.
[4:54] <_unreal_> https://www.google.com/search?q=weather+florida&oq=weather+florida&aqs=chrome.0.0l6.1693j0j4&sourceid=chrome&ie=UTF-8
[4:54] <_unreal_> oh illinois thats not bad
[4:54] <_unreal_> thats almost do north
[4:54] * BenderRodriguez (~TaxDodger@unaffiliated/foxhoundz) has joined #raspberrypi
[4:54] <ball> -5C here now, which is less cold than it was when I left for work this morning.
[4:55] <_unreal_> ya its freaking 75 currently :)
[4:55] <_unreal_> sucks
[4:55] <_unreal_> just walked the dog in shorts and bear feet :)
[4:56] * Mibix (~Mibix@d14-69-162-166.try.wideopenwest.com) has joined #raspberrypi
[4:56] <_unreal_> ya endless summer sucks
[4:57] * Stromeko (~Stromeko@unaffiliated/stromeko) has joined #raspberrypi
[4:59] * teepee (~teepee@unaffiliated/teepee) has joined #raspberrypi
[5:00] * dt3k (~dt3k@unaffiliated/dt3k) Quit (Quit: quit)
[5:01] * dt3k (~dt3k@unaffiliated/dt3k) has joined #raspberrypi
[5:02] * BenderRodriguez (~TaxDodger@unaffiliated/foxhoundz) Quit (Ping timeout: 245 seconds)
[5:05] * epergny (~user@2a01:c50e:d235:b900:3697:f6ff:fe25:99ec) has joined #raspberrypi
[5:09] <toastintheshell> cry me a river _unreal_
[5:11] * kpmhughes (~textual@c-24-62-60-89.hsd1.ma.comcast.net) Quit (Quit: My MacBook has gone to sleep. ZZZzzz…)
[5:11] <ball> I'm off to bed, anyway.
[5:11] <ball> Goodnight all
[5:11] * ball (~ball@99-60-12-181.lightspeed.cicril.sbcglobal.net) Quit (Quit: leaving)
[5:11] <toastintheshell> wuss
[5:13] <CarlFK> https://howchoo.com/g/mwnlytk3zmm/how-to-add-a-power-button-to-your-raspberry-pi
[5:13] <toastintheshell> 65mph gusts of wind right now here
[5:14] <CarlFK> GPIO.wait_for_edge(3, GPIO.FALLING)
[5:14] * samy^ (~samykamka@samy.pl) Quit (Ping timeout: 244 seconds)
[5:14] <CarlFK> is that really interrupt triggered, or does it poll?
[5:14] * tdy2 (~tdy@unaffiliated/tdy) has joined #raspberrypi
[5:14] <CarlFK> and where is it windy?
[5:15] <toastintheshell> boston
[5:16] <toastintheshell> that's pretty nifty
[5:18] <toastintheshell> so how does 'a few scripts' power the pi on?
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[5:24] <toastintheshell> that's a good question CarlFK, does anyone know if gpio input triggers an interrupt?
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[5:25] <toastintheshell> or at least if this particular python script would cause it to do so
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[5:27] <CarlFK> or... do the .. chips? support firing interrupts on a gpio input switch? or trigger?
[5:27] <CarlFK> im not sure the words
[5:31] <toastintheshell> what's powering it on? there must be some ic always listening for the goahead from gpio3 when power is applied I imagine
[5:32] * Galactus (~Galactus@unaffiliated/galactus) Quit (Ping timeout: 245 seconds)
[5:37] <CarlFK> thats my guess
[5:37] <toastintheshell> damn, my router is cruisin for a bruisin lately
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[5:39] <CarlFK> the bigger problem is UPS monitoring and shutting down on some trigger
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[5:47] <toastintheshell> back sorry
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[5:48] <toastintheshell> CarlFK: Each GPIO pin, when configured as a general-porpoise input, can be configured as an interrupt source to the ARM.
[5:49] <CarlFK> toastintheshell: cool - that's what I figured
[5:49] <CarlFK> got docs for that?
[5:49] <toastintheshell> https://www.raspberrypi.org/documentation/hardware/raspberrypi/gpio/README.md
[5:49] <toastintheshell> yeah, sorry, no copy/paste from browser, so gotta retype into terminal lol
[5:50] <toastintheshell> I gotta fix that
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[5:53] <CarlFK> wow, thanks
[5:54] <CarlFK> and yeah, that' what I was looking for
[5:54] <toastintheshell> no problem, glad to help, I don't know jack about squat about hardware stuff, so it's a good read for me too
[5:56] <toastintheshell> so they're not always interrupts, but they can be configured as such
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[6:18] <toastintheshell> oh man :/ sh.art is taken
[6:18] <toastintheshell> was going to start a blog "the art of the shell"
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[9:22] <notrabies> hi, phil swift here with flex seal
[9:22] <notrabies> this channel was loaded with communists last time I was here
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[9:30] <toastintheshell> notrabies: communists?
[9:30] * Rangar (~Rangar@ Quit (Quit: Leaving)
[9:30] <amigojapan> notrabies: pretty sure this is not a political channel
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[9:30] <toastintheshell> I don't remember anything political
[9:31] <amigojapan> who cares what political views someone has here
[9:31] <toastintheshell> must have missed the communist party
[9:31] <amigojapan> we are interested in technical things
[9:32] <toastintheshell> why do communists only drink green tea?
[9:32] * Plasmoduck (~textual@unaffiliated/plasmoduck) Quit (Quit: My iMac has gone to sleep. ZZZzzz…)
[9:32] <amigojapan> haha toastintheshell
[9:32] <toastintheshell> because proper tea is theft
[9:32] <amigojapan> lol
[9:33] <toastintheshell> I'll be here all week, remember to tip your wait staff!
[9:33] <amigojapan> we have no tips here in Japan
[9:33] <notrabies> there's no such thing as theft, it's simply "rich privilege"
[9:34] <toastintheshell> communism spread to japan already?
[9:34] <amigojapan> notrabies: I recomend you go to the phiosophy channel or something
[9:34] <amigojapan> toastintheshell: its nto communism, waitresses are well paid
[9:34] <toastintheshell> I wonder if a raspberry pi qualifies as "means of production"
[9:35] <toastintheshell> amigojapan: I was just making more jokes
[9:35] <amigojapan> ok :)
[9:35] <toastintheshell> I'm dead, it's 3:35am here, I should sleep
[9:35] <notrabies> doesn't the bank of Japan own like 70% of the entire stock market? Maybe you're a communist and you just didn't know it
[9:36] <amigojapan> good night toastintheshell
[9:36] <amigojapan> notrabies: I am not going ot discuss politics, better come back when you want to talk abotu the raspberry pi
[9:36] <notrabies> never heard of it
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[9:37] <amigojapan> notrabies: there is ##politics
[9:37] <toastintheshell> I'll give you a topic before I go: "would the bank of japan run better if they switched all their computers to raspberry pis?" - discuss!
[9:38] <notrabies> what about - the ps2 is the most overrated video game system of all time: discuss
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[9:39] <amigojapan> I have seen Linux run on the PS2
[9:40] <toastintheshell> that's almost on topic
[9:40] <toastintheshell> can the playstation 2 run on a raspi?
[9:40] <notrabies> in the year 2019, the ps1, GBA, DS, and 3ds all have better games than PS2 yet I think PS2 sold more consoles than any other device
[9:41] <amigojapan> toastintheshell: I have nto yet ried emulating it, i am into older games
[9:41] <notrabies> have you used the retroarch runahead feature yet
[9:42] <toastintheshell> I imagine you could make it work, what was ps2, powerpc?
[9:42] <toastintheshell> the ps3 was ppc
[9:42] <toastintheshell> anyway gotta go byyyyyeeeeeee!
[9:42] * toastintheshell (~pi@pool-108-7-186-189.bstnma.fios.verizon.net) Quit (Quit: WeeChat 1.6)
[9:43] <notrabies> retroarch runahead=2, frame delay=9, audio latency=32, use second runahead instance=off, dynamic audio rate control changed from 0.005 to 0.000
[9:44] <notrabies> feels about the same as a native console input lag-wise
[9:44] <notrabies> that's settings for a skylake or higher laptop or desktop tho, not a crapsberry pi
[9:45] <amigojapan> someone ban notrabies please
[9:45] * aZz7eCh (~aZz7eCh@unaffiliated/azz7ech) has joined #raspberrypi
[9:46] <notrabies> I agree
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[9:48] <notrabies> amigojapan: why is it taking so long? can we get some service here?
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[9:48] <amigojapan> notrabies: everyone is sleeping
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[10:01] <notrabies> amigo: would you say that I'm big in japan
[10:03] <amigojapan> notrabies: again, not on topic
[10:03] <amigojapan> notrabies: we are here to talk about the raspberrypi
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[10:03] <amigojapan> you are just trolling
[10:04] <aZz7eCh> hi again guys. am having a hell of a time trying to implement GPIO.event_detected() methodology to my python script for listing for button presses .. I am using the chosen pin as input and using the pullup code. I am then checking for GPIO.falling which, is working, but its triggering all over the place on its own. so far im getting identical results to simply polling the gpio every loop... what am i dong wrong?
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[10:05] <aZz7eCh> my current method is simply looping the script every 0.03 with time.sleep, and polling the gpio 10 times in an instant loop to confirm definitely have a button press and not just fluctuations ... the probelm is, i seem to be missing the occational trigger when pressing hte button.
[10:06] <aZz7eCh> someone earlier suggested i look into this event_detect interupt method ... which looked perfect but.. crazy identical results... i'd still have to poll the gpio falling state 10 times in a row to be sure it really is
[10:06] <amigojapan> aZz7eCh: it would help if you pasted code
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[10:07] <amigojapan> aZz7eCh: on a pastebin
[10:07] <aZz7eCh> the code is overkill as it operates 4 circuits in a machine ... i will try and cut the code down to a minimum example
[10:07] <amigojapan> right
[10:07] <amigojapan> aZz7eCh: cut it down to a single switch
[10:07] <aZz7eCh> yep bbs bare with me
[10:07] <amigojapan> k
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[10:12] <amigojapan> aZz7eCh: also make sure your circuit follows this kind of design https://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Pullup_Resistor.png/220px-Pullup_Resistor.png
[10:13] <aZz7eCh> my wiring is directly pi<->momentary button
[10:13] <aZz7eCh> using software pullup
[10:14] <amigojapan> ok, i am not familliar with “software pullup”
[10:14] <aZz7eCh> GPIO.setup(10,GPIO.IN, pull_up_pull_down=GPIO.PUD_UP)
[10:15] <amigojapan> ah ok
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[10:18] <amigojapan> aZz7eCh: maybe have you tried GPIO.setup(10,GPIO.IN, pull_up_pull_down=GPIO.PUD_DOWN) ?
[10:18] <aZz7eCh> umm
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[10:19] <aZz7eCh> but then i'd have to reverse all my code to check for the oposite condition in every instnace
[10:19] <aZz7eCh> up or down doesn't matter right? just means you'll be testing for opposite condition
[10:19] <amigojapan> it all depends on if you know it will pull up to 1 or pull down to 0 https://www.raspberrypi.org/forums/viewtopic.php?t=87292
[10:20] <amigojapan> it depends I think if you are hooking the pushbotton to ground or to VCC
[10:20] <aZz7eCh> for inputs i output power on the gpios, soon as a fall is detected, they are dropping hte V to groudn pin ...
[10:21] <aZz7eCh> wayy off the topic this is but
[10:21] <amigojapan> anyway, I will let you reduce your design to one pin so we can tell what is going on
[10:21] <amigojapan> err one switch*
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[10:27] <aZz7eCh> amigojapan, i will come back to this, have lost myself in another method idea
[10:27] <amigojapan> ok
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[10:28] <aZz7eCh> i will prepare the example code before i ask laster
[10:28] <aZz7eCh> later*
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[10:30] <waveform> aZz7eCh, sounds like you need some de-bounce. There's either a hardware way (small cap wired between GPIO and ground) which is probably the most reliable, or the software way (but I should warn that RPi.GPIO's debounce is rather basic)
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[10:32] <aZz7eCh> well my software method to date has beeen to simply poll the gpio 10 times instantly .. if its just line interfeerence it doenst make it through 10 checks. if it does, button must really have been pressed. the problem is... some people press the button too quick, and it does not trigger. to counter this, i loop the code VERY fast (0.03ms)
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[10:34] <aZz7eCh> even with it looping quickly, and the pi now running warm, it can still sometimes not trigger due to need to do the above
[10:34] <waveform> yup, busy loop - it works, but ideally interrupts are used for this sort of thing (but then you will run into the bounce problem with mechanical switches which means implemented some form of debounce)
[10:34] <waveform> frankly, even with interrupts, RPi.GPIO can miss edges because it uses a single thread to both monitor edges and dispatch callbacks
[10:34] <waveform> (if the callback is active when another edge comes in that edge is lost)
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[10:35] <aZz7eCh> im playing with callback now
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[10:35] <aZz7eCh> i wasnt b4
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[10:36] <waveform> pigpio is a rather better implementation that uses a separate thread (actually its root daemon process) to handle edge monitoring, hence it doesn't drop edges if the callback is currently active (and its debounce is "proper" too)
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[10:36] <aZz7eCh> all i need my callbacks to do is change a variable value if definite fallen edge detected.. so i'm thinking add event detect on the channel falling, calling a callback that instantly checks 10 times if in a falling state still
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[10:36] <aZz7eCh> but all this seems to be equating to what im already doing polling the gpio directly each loop
[10:37] <waveform> not exactly - interrupts aren't equivalent (in terms of CPU usage) to a busy loop - they won't run the CPU "hot"
[10:37] <aZz7eCh> ahhh well i'll keep fiddling then
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[10:37] <waveform> with interrupt driven code, the CPU is basically idle (well, free to do other things) until an edge is detected; the edge triggers an interrupt which "wakes" the CPU
[10:37] <aZz7eCh> if, i'm using wait for edge method you mean right ?
[10:38] <aZz7eCh> which im not
[10:38] <aZz7eCh> i'm still looping my main program
[10:38] <aZz7eCh> and just checking for even detected
[10:38] <aZz7eCh> event*
[10:38] <waveform> yes, RPi.GPIO's wait_for_edge is indeed using interrupts
[10:38] <aZz7eCh> im not using wait for edge
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[10:38] <waveform> ah, well in that case disregard my ramblings :)
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[10:39] <aZz7eCh> am i to think you're suggesting i should split my program into 4 separate programs for each circuit i'm controlling and have them all waiting for edge individually?
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[10:40] <waveform> no - a single program can wait on multiple edges. Any edge that's being waited on will "wake" the program to do whatever's been assigned for that pin
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[10:41] <aZz7eCh> but, from what you said earlier .. if one edge/callback has been detected and is running, no other circuit will
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[10:43] <waveform> that is unfortunately the case with RPi.GPIO (which is why it's important to keep callbacks as fast as possible with that particular GPIO driver), but it's not the case with other GPIO drivers (like pigpio)
[10:45] <waveform> put it this way: events are the "right" way to do this in software. They doesn't involve a busy loop, so they don't run the CPU "hot", and the code is reasonably clean. The "right" way to deal with the debounce is to do it in hardware (small cap, e.g. 0.1uF between GPIO and ground)
[10:45] <waveform> They don't - oops
[10:45] <waveform> https://www.allaboutcircuits.com/technical-articles/switch-bounce-how-to-deal-with-it/ <-- decent article on hardware debounce
[10:46] <immibis> "right", heh
[10:46] <immibis> the hardware guys would tell you to do it in software to save 5 cents per unit
[10:46] <aZz7eCh> yeah i dont think i have an issue with handling debounce
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[10:47] <waveform> yes - there's a reason I'm quoting "right" - there's no absolute "right" answer, but there's preferable ways of doing things from various perspectives
[10:47] <aZz7eCh> later i will put the code on pastebin and ask again ..
[10:47] <waveform> also, I might suggest having a look at gpiozero too (full disclosure: I'm one of the authors) which might make this is a bit simpler. It's a wrapper library over a variety of drivers like RPi.GPIO, pigpio, and so on which makes switching driver easy if you want to play with different debounce implementations
[10:48] <aZz7eCh> i just have interfeerence/noisy circuits to the buttons
[10:48] <waveform> https://gpiozero.readthedocs.io/en/stable/recipes.html# <-- some recipes showing off gpiozero's syntax
[10:48] <aZz7eCh> which is where the random triggering is comgin from
[10:49] <waveform> you're getting random triggering even when no-one's pressing/releasing a button?
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[10:49] <aZz7eCh> yep
[10:49] <smouldery> Hmm similar question, I'm having a lot of issues with some hand-coded transmitter code that's pretty timing dependant, to the extent that moving it from using pigpio to the daemon stopped it working properly - I assumed using direct fs access would be faster but it seems to not be the case?
[10:50] <smouldery> Pigpio w/o the daemon isn't an option because it needs to be run as root
[10:50] <smouldery> And I'm not doing that if at all possible
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[10:51] <waveform> smouldery, rather depends exactly what you're trying to do. For instance, the pigpio daemon has various methods for implementating SPI and I2C (bit-banging variants too) that can be used to ensure precise timing of those protocols (so your code issues a high level "write these bytes to this I2C address" and the daemon handles the detail)
[10:51] <smouldery> (python using gpiozero works but only on the pi2b, and I wanna get this to run on a zero)
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[10:52] <smouldery> Right, I'm transmitting some data that uses bit length diffences as binary bits
[10:52] <smouldery> Short pulse for zero, long pulse for one
[10:53] <smouldery> So unfortunately not something I can use an existing protocol for
[10:53] <waveform> smouldery, you might want to have a look at pigpio's "wave" functions for that sort of thing. They're not (currently) used by gpiozero itself, but there's python and C libraries for addressing pigpio directly. Let me dig out the reference...
[10:54] <smouldery> Sure, thanks
[10:54] <waveform> http://abyz.me.uk/rpi/pigpio/python.html#wave_add_generic
[10:54] <smouldery> Right now I'm using nanosleep and just writing to the pins
[10:55] <waveform> pigpio should give you pretty precise timing via those functions as it's using the DMA engine to drive the GPIO registers (the DMA engine isn't interruptable so regardless of the non-real-time nature of the OS, the timing winds up precise)
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[10:56] <smouldery> It was working if I used the library directly, but not if I used the daemon using the way I was doing it before
[10:57] <smouldery> Or rather, the pulse timings and lengths were all fucked up
[10:57] <waveform> watch the language, please (family friendly rules on this channel). But yes, bit-banging via the daemon is generally a bad idea because the latency of the network socket introduces a *lot* of variation
[10:58] <smouldery> Oh welp, sorry
[10:58] <smouldery> Wave looks doable
[10:58] <waveform> hence why it's better to try and use "higher level" functions that set up what you want to transmit and then leaves the daemon to it
[10:58] <aZz7eCh> ((is a variable accessable to a callback function from the main program?))
[10:59] <waveform> aZz7eCh, if you've declared the variable global, then it can be, yes
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[10:59] <smouldery> If that works, that's ideal tbh
[10:59] <smouldery> I'll test it out later tonight
[11:00] <waveform> good luck :)
[11:00] <smouldery> Wow yeah that's literally perfect and would have saved like, most of my code
[11:01] <waveform> (I need to have a play with the wave functions at some point - they may be helpful in the new TonalBuzzer implementation in gpiozero when using the pigpio backend)
[11:01] <smouldery> I might not even need C code at this rate tbh
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[11:12] <aZz7eCh> sorry to keep banging around int he same bucket .. but just so i have my methodology clear, does this sound, sound? I should rewrite my entire control program to a non looping simple wait for edge bunch of statements on the GPIOS ... (if no loop, how does it keep running if ever an edge is launched), .. and what i was thinking is... that I hsould simply have my callbacks, launch separate python scripts apart from the main control prog, yeah ?
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[11:20] <waveform> aZz7eCh, "how does it keep running?" <-- excellent question. You do have to do "something" to keep the main thread busy and not let the program just quit. We generally use "pause" for this in the gpiozero examples: https://gpiozero.readthedocs.io/en/stable/recipes.html#led
[11:20] <waveform> (scroll down past the first example code for the one using "pause" from the "signal" module)
[11:21] <waveform> you can launch separate python scripts from a callback if you want, but launching a separate process is a relatively expensive operation. A thread *may* be sufficient, depending on what you actually what to accomplish in response to edges
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[11:27] <aZz7eCh> well... response to edgges = start a pump running for X number of RL mintues ... stop if another button is pushed. stop if timer ends. another circuit has a float switch in which a pump needs to go on and off. and another 2 circuits controlling solenoids for water inlets etc..
[11:28] <aZz7eCh> so .. poitn being all these things take time once initiated... all have to operated independantly and at any time togheter.
[11:28] <aZz7eCh> and all take time.
[11:29] <aZz7eCh> am thinking ... if edge is detected and true, set variable saying 2nd script is being launched. 2nd script runs and updates the variable about its status hwne exited or finished...
[11:29] <aZz7eCh> but all this still has me needing hte main program to loop
[11:29] <aZz7eCh> *sigh.
[11:32] <aZz7eCh> and yep see the Pause() use
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[11:40] <waveform> aZz7eCh, okay I don't think you need separate processes for any of that, but you might want threads for a timer. Here's a quick demo of how something like what you've described might look in gpiozero: https://pastebin.ubuntu.com/p/9BKWGypXT5/ (it's missing the solenoid stuff, but the timer bits are in there)
[11:41] <waveform> (assumes pulled up switches on GPIOs 5, 6, and 13, and the pump motor on an H-bridge driven by GPIOs 17 and 27)
[11:42] <waveform> (oh, and the timer is fixed at 10 seconds)
[11:42] <waveform> anyway, crude demo but it might give you some ideas
[11:43] <waveform> oh, hang on - might need timer.start() after the construction - I forget if timer's start themselves automatically - just a mo
[11:44] <waveform> doh - they don't, fixed version: https://pastebin.ubuntu.com/p/J6tgrP7wYJ/
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[11:58] <pagios> question, if i have an nfs mount on my server, and i am writing directly to this network location, am i using the disk io of my server? or directly writing to the network?
[11:59] <Habbie> pagios, your 'network' does not store files; your server does
[11:59] <pagios> yes but do you have a tmp disk io on server
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[12:00] <Habbie> i'm sorry, i don't understand the question
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[12:00] <BurtyB> pagios, it's writing to the nfs server
[12:00] <pagios> yes but are you using temporary disk io
[12:00] <pagios> then writing to disk
[12:00] <pagios> on the network
[12:01] <Habbie> depends on your nfs mount settings
[12:05] <aZz7eCh> wait what the F... so using timer is an object in its own thread
[12:05] <aZz7eCh> omg i'm such a novice
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[12:13] <laptop2> is it normal that the Mathematica EULA says "Model A or Model B Raspberry Pi computer" without including the Zero even today?
[12:13] <laptop2> does that change anything though
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[12:16] <waveform> aZz7eCh, yes Timer derives from Thread so it's a background thread in its own right. Once started, it'll basically sleep() the thread for the time specified, then execute the specified function *in that background thread*
[12:16] <waveform> (it's a little more complex than that due to the cancel() function, so at a guess it's actually doing Event.wait() instead of sleep() but anyway)
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[12:19] <BurtyB> laptop2, maybe best to check (if the search gods are on your side) the forum as iirc there was something on there about it
[12:20] * Angss (~angs@ has joined #raspberrypi
[12:22] <laptop2> BurtyB, thanks, they don't seem to be so right now, will search again afterwards tho
[12:24] * Angs (~angs@ Quit (Ping timeout: 255 seconds)
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[12:34] <sheng> hello. i have issues downloading the lastest iso. torrent doesnt start and direct download stucks
[12:34] <sheng> suggestions?
[12:35] <sheng> i've tried wget but i cant get a proper url to the iso...
[12:37] * SimonNL (~SimonNL@3E91CDD1.cm-13.dynamic.ziggo.nl) Quit (Remote host closed the connection)
[12:37] <Habbie> it's not an iso
[12:37] <Habbie> but
[12:37] <Habbie> where are you trying to get the url?
[12:38] <larsks> sheng: you're trying to download raspbian? There isn't an iso image, but there compresesd raw images. You should be able to get those just by copying the link from https://www.raspberrypi.org/downloads/raspbian/. E.g., for the first image, just "wget https://downloads.raspberrypi.org/raspbian_full_latest".
[12:38] <larsks> wget will follow the redirects and download the image.
[12:39] <Habbie> it will, although the name will be bad
[12:39] <Habbie> just add .zip after downloading
[12:39] * Herc_ (~odt@p200300D98F25AF0086E0DCBB530A48A9.dip0.t-ipconnect.de) Quit (Ping timeout: 264 seconds)
[12:40] <sheng> https://www.raspberrypi.org/downloads/raspberry-pi-desktop/
[12:40] <sheng> here
[12:41] <Habbie> oh wait
[12:41] <Habbie> that is an ISO
[12:41] <Habbie> but, to be clear, that's for a PC or Mac, not a Pi
[12:41] <Habbie> is that what you want?
[12:41] <ShorTie> that is for a pc not a pi
[12:41] <sheng> yep. i need an iso to test stuff in a virtual machine
[12:41] <Habbie> anyway, advice stands - you can pass that url to wget and it will download it, just with a bad name
[12:42] <sheng> so if i rename the downloaded thingie *.iso
[12:42] <Habbie> use 'wget --content-disposition' to get the right name immediately
[12:42] <sheng> im ok?
[12:42] <Habbie> sheng, should be
[12:43] <sheng> oh, trying that
[12:43] <Habbie> it should be 2533359616 bytes
[12:43] <Habbie> roughly 2.4 gigabyte
[12:43] <sheng> yes. alredady downloaded with the --content-disposition parameter
[12:43] <sheng> thank you :]
[12:44] <sheng> anyway, is the http / torrent method broken?
[12:45] * Stofpad (~Stofpad@vc-gp-n-41-13-228-192.umts.vodacom.co.za) Quit (Quit: Leaving)
[12:45] * Angss is now known as Angs
[12:45] <Habbie> http or torrent/
[12:46] <Habbie> the http button works fine for me
[12:46] <Habbie> although i did not let it finish
[12:47] * basteh (~basteh@unaffiliated/basteh) has joined #raspberrypi
[12:47] <sheng> it hangs around 50% but im quite sure its me.
[12:47] * lankanmon (~LKNnet@CPE64777d632383-CM64777d632380.cpe.net.cable.rogers.com) has joined #raspberrypi
[12:47] <sheng> torrent are broken tho
[12:49] <Habbie> i'll test the torrent
[12:49] <Habbie> i'm testing the torrent now
[12:52] <sheng> and? :D
[12:53] <BurtyB> works for me
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[12:56] <sheng> ok, my internet sucks.
[12:56] <sheng> thanks
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[12:56] <Habbie> torrent is at 40% for me now
[12:56] * mike_t (~mike_t@pluto.dd.vaz.ru) Quit (Remote host closed the connection)
[12:56] <Habbie> in 7 minutes
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[13:00] * BitEvil is now known as SpeedEvil
[13:01] * fs31 (~Phil@ Quit (Ping timeout: 255 seconds)
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[13:16] <sheng> bye
[13:16] * sheng (sbd@not.hs.vc) has left #raspberrypi
[13:17] <wwilly> Hi, on a rpi3, I'm using pigpiod to control some stuff with GPIO. It's working well, but sometime, the gpio is not responding to my software anymore. I'm using the i2c and spi as binary gpio. Is there any linux service, or a particular hidden cpu functionality that can change the behaviour of this GPIO? Is possible to force this GPIO to never being used as i2c or spi with an option on /boot/config.txt or somewhere else? Many thanks in advance.
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[13:53] <zylinx> Afternoon all
[13:54] * janco_ (~janco@83-160-103-27.ip.xs4all.nl) has joined #raspberrypi
[13:54] <zylinx> Anybody here play with OpenALPR ?
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[14:16] <Mewster> Hello, anyone here is knowledgeable about cross-compiling qtwebengine?
[14:16] <Habbie> Mewster, probably best to show us your problems
[14:16] <Mewster> I have a theory/question
[14:16] <Mewster> wait, disregard the qtwebengine thing; it's a question about general qt cross-compiling
[14:17] <Mewster> so, qt seems correctly cross compilable up to 5.12.0
[14:17] <Mewster> while on 5.12.1, if opengles2 is requested, it seems it can't find the gles libs
[14:17] <Mewster> I took a look on the changes that have been made on 5.12.1
[14:17] <Mewster> and I found the following: - qmake / WinRT: * Cross-builds will now ignore pre-set values of %INCLUDE% and %LIB% when building target executables. If necessary, use configure's -I and -L switches when building Qt, and pass QMAKE_INCDIR and QMAKE_LIBDIR on qmake's command line when building own projects.
[14:18] <cslcm> are you using buildroot or something like that?
[14:18] * cgp (~Thunderbi@maltamail.stanleybet.com.mt) Quit (Read error: Connection reset by peer)
[14:18] <Mewster> no, i'm following the https://wiki.qt.io/RaspberryPi2EGLFS tutorial
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[14:19] * Makaveli7 (~Makaveli7@unaffiliated/makaveli7) Quit (Quit: Leaving)
[14:20] <Mewster> Now, I started taking a look at crosscompiling only last week, maybe someone more knowledgeable and that hit their head on the same issue would know if this means something
[14:21] * only42 (~user42@ Quit (Ping timeout: 250 seconds)
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[15:00] * noahjaac is now known as noahajac
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[15:15] <dogbert2> m00000000000000000000000000!
[15:17] <BurtyB> se
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[16:23] <fred__tv_> How can I keep a bluetooth device always connected to raspberry ? I mean search and connect at boot and every time it loses connection (out of range or restart of BT device) ??
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[16:31] <Valinath> fred__tv_: have you tried this? https://raspberrypi.stackexchange.com/questions/53408/automatically-connect-trusted-bluetooth-speaker
[16:31] * im0nde (~im0nde@2a0a-a541-840b-0-ba27-ebff-fe20-c671.ipv6dyn.netcologne.de) Quit (Ping timeout: 264 seconds)
[16:32] * Syliss (~Syliss@asa1.digitalpath.net) has joined #raspberrypi
[16:32] <fred__tv_> just read, I have an issue with bluetoothctl saying :
[16:32] <fred__tv_> [bluetooth]# connect 98:D3:51:F9:54:B4
[16:32] <fred__tv_> Attempting to connect to 98:D3:51:F9:54:B4
[16:32] <fred__tv_> [CHG] Device 98:D3:51:F9:54:B4 Connected: yes
[16:32] <fred__tv_> [CHG] Device 98:D3:51:F9:54:B4 ServicesResolved: yes
[16:32] <fred__tv_> Failed to connect: org.bluez.Error.NotAvailable
[16:32] * tommy`` (~UPP@unaffiliated/tommy/x-6566540) has joined #raspberrypi
[16:33] <fred__tv_> for now I'm manually using: rfcomm connect 0 98:D3:51:F9:54:B4 1 -r &>/dev/null &
[16:34] <fred__tv_> probably I should put rfcomm in a loop analyzing if device is connected or not....
[16:35] * Envil (~envil@55d4d804.access.ecotel.net) has joined #raspberrypi
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[16:48] * MikeRL (~MikeRL@pool-68-134-55-12.bltmmd.fios.verizon.net) Quit (Ping timeout: 258 seconds)
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[16:58] <Valinath> fred__tv_: This might be a long shot but do you have 2 installed bluetooth manager battling the daemon? I've had a similar issue with network-manager and another one trying to hijack the proccess, I made a workaround with a SIGKILL-script on the process.
[16:59] <Valinath> As i said, abit longshot but maybe something uses the same process wich causes it to be not availible for your task at hand?
[16:59] * Budgii_AFK is now known as Budgii
[17:01] <Valinath> fred__tv_: ps command and see if there is some unwanted handling bluez?
[17:02] * fred__tv (~fred__tv@ip-242-138.sn1.clouditalia.com) has joined #raspberrypi
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[17:03] * fred__tv_ (~fred__tv@93-46-196-134.ip109.fastwebnet.it) Quit (Ping timeout: 244 seconds)
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[17:11] * fred__tv_ (~fred__tv@93-46-196-134.ip109.fastwebnet.it) Quit (Ping timeout: 246 seconds)
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[17:33] <fred__tv__> Possible..... I'll take a look
[17:34] * Bambus (~Bambus@p200300DF87219C00294DBFFF0F3432BF.dip0.t-ipconnect.de) Quit (Client Quit)
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[18:14] <Tenkawa> opds
[18:14] <Tenkawa> er oops
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[19:26] <Cobalt> Hello. What would be a good car adaptor to use for powering a RPi3B+?
[19:26] * clemens3_ (~clemens@mx.eniso-partners.com) Quit (Ping timeout: 250 seconds)
[19:26] <DanielTheFox> what will you do with the Pi 3B+ in the car?
[19:26] <DanielTheFox> (the necessary amperage on the car adaptor depends on what you do on the Pi 3B+
[19:27] <Cobalt> Connect a hub with a GPS dongle on it, and three wireless USB dongles. Total power draw of just under 1A.
[19:27] * javi404 (~quassel@unaffiliated/javi404) has joined #raspberrypi
[19:27] <DanielTheFox> ok
[19:27] <Cobalt> That or a 3A+. I have both.
[19:27] <DanielTheFox> measured it or just an estimate?
[19:28] <Cobalt> Measured it.
[19:28] <DanielTheFox> Cool, you have one of those fancy Kill-A-Watt USB-edition, right?
[19:28] <DanielTheFox> I need one
[19:28] <DanielTheFox> :D
[19:28] <Cobalt> Eh?
[19:28] <DanielTheFox> well
[19:28] * akk (~akk@ Quit (Ping timeout: 240 seconds)
[19:29] <DanielTheFox> the Kill-A-Watt (not the real name probably) thingie is something that measures the current drawn by connected devices in your house
[19:29] <DanielTheFox> for example, you connect it to the wall, and, say, your TV to the Kill-A-Watt
[19:29] <DanielTheFox> and the device will tell you how much is it consuming
[19:29] <Habbie> there is a real device for that by that name
[19:29] <DanielTheFox> ok, then it's the real name
[19:29] <Cobalt> Well, I have a cheap USB one, yes.
[19:29] <Habbie> but i don't know if you can inline it on usb
[19:29] <DanielTheFox> but not for the USB thing, that's for sure
[19:30] <Habbie> usb power meters exist too, indeed
[19:30] <DanielTheFox> ok
[19:30] <DanielTheFox> then you need only a 1.2A (minimum) device that is able to put 5V (or slightly more)
[19:31] <DanielTheFox> and that won't shift voltage as you draw more amps
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[19:31] <DanielTheFox> I don't know exact brands
[19:31] <DanielTheFox> do you have a good fat wire that won't lose voltage?
[19:31] <Cobalt> Fair enough, most of the ones I'm looking at are chargers, but they will happily deliver the voltage at a rated 2.4A.
[19:31] <DanielTheFox> wires on their own can cause troubles
[19:31] <Cobalt> Can get a fat wire.
[19:31] <DanielTheFox> ok
[19:32] <DanielTheFox> long wires have more impedance than short wires, and thinnier wires have more than fatter wires
[19:32] <Cobalt> No more than 1m.
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[19:32] <DanielTheFox> that's good enough
[19:32] <DanielTheFox> yet, you still want a fat wire
[19:32] <DanielTheFox> because the Pi appears to worry more about voltage than about amps
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[19:36] <SimonNL> you forgot lead material and temperature DanielTheFox
[19:37] <DanielTheFox> temperature is also a factor
[19:37] <SimonNL> :)
[19:37] * DanielTheFox isn't aware of the lead thing tho
[19:37] * DanielTheFox is only aware of lead being toxic
[19:38] <SimonNL> mmm google translate it is
[19:38] <DanielTheFox> also, soldering tin has lead
[19:38] <SimonNL> wire material !
[19:38] <DanielTheFox> hmm
[19:39] <DanielTheFox> why doesn't it have copper?
[19:39] <DanielTheFox> (or alluminum)
[19:39] <Habbie> lead-free solder is pretty common now
[19:39] <DanielTheFox> heh
[19:39] <DanielTheFox> my solder isn't lead-free tho
[19:39] <DanielTheFox> (which may explain some things, now that I think about it)
[19:40] <Cobalt> Hmm.
[19:40] <DanielTheFox> and 99% solder I've seen in electronics shops are 60/40 or 70/30, almost none lead-free
[19:41] <Cobalt> What about the 1%? :P
[19:41] <DanielTheFox> part of almost-none
[19:41] <Habbie> i ran into lead-free solder in a UK shop that was going out of business last year
[19:41] <Habbie> haven't tried it though
[19:41] <Habbie> i understand it's somewhat trickier to use
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[19:44] <SimonNL> electrical resistivity was what I meant DanielTheFox
[19:44] <DanielTheFox> impedance
[19:44] <SimonNL> mmm
[19:45] * DanielTheFox doesn't know how to write Ohm symbol in Compose keyboard
[19:46] <SimonNL> just say omega
[19:46] <SimonNL> Omega
[19:46] <SimonNL> Ω or copy one from internet
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[20:09] <Rickta59> anyone see the ST32MP announcement? I'd like to see something like that from the pi people
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[20:11] <Rickta59> or a riscv big little setup
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[20:44] <aZz7eCh> waveform, you still around ?
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[21:03] <shiftplusone> aZz7eCh, any luck
[21:04] <shiftplusone> ?
[21:05] <aZz7eCh> welp. i've converted my needs to an interupt callback method ... but ... has made the whole situation far worse. I'm starting to think internal pullups do NOTHING
[21:05] <aZz7eCh> pastebin.net ?
[21:05] <shiftplusone> worth a shot
[21:06] <shiftplusone> I'm going to head out soon, but somebody else may be able to help.
[21:06] <aZz7eCh> nps
[21:06] <aZz7eCh> https://pastebin.com/GYRmFWkJ
[21:06] <aZz7eCh> this is the current code i set up
[21:07] <aZz7eCh> bascially ... its triggering all inputs non stop so I have to software loop check them out. the more i do this the more i create my original problem - pressing button too fast wont trigger vend
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[21:09] <shiftplusone> Why are you reading the value in your callback? The fact that it triggered tells you that the button was pressed, you don't need to then read the button
[21:09] <aZz7eCh> its not being pressed
[21:09] <aZz7eCh> thats noise
[21:09] <aZz7eCh> hence i have to immediately check repeatedly if its really being pressed ..
[21:09] <shiftplusone> How long is the wire?
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[21:10] <aZz7eCh> 2 of the control wires are about 2-3 feet long,s trapped to stainless steel, with 240V lines in proximity, and very, very noisy pumps. 2 other control circuits are 3-4 feet long.
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[21:11] <shiftplusone> sounds like the wires are acting as antennas in this case and picking up noise? Have you looked at the signal on a scope? Have you considered using external pull-ups with lower values?
[21:12] <aZz7eCh> no i dont have a scope
[21:13] <aZz7eCh> i currently have about 80 of these machines around the city ... all working on my original looping code. none of them are using external pullups/anything, and not even sure how i'd neatly add things like resistors or capacitors to our boxes
[21:13] <shiftplusone> Then keep your wires as short as possible and use pull ups appropriate to the environment. If the input to your software is garbage, then you'll get garbage output.
[21:14] * agajania (~agajania@frogn.cs.newpaltz.edu) Quit (Quit: agajania)
[21:14] <aZz7eCh> obviously... but these are vending machines. i have no choice in how far the wires have to run.
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[21:14] <shiftplusone> How could your looping code work if it was just reading the state of the pin? Wouldn't you still get false positives?
[21:15] <aZz7eCh> thast why i check 10 times instantly that its definitely a trigger
[21:15] <aZz7eCh> on all circuits
[21:15] <aZz7eCh> to weed out noise
[21:15] <aZz7eCh> it causes the unfortunate side effect of sometimes someone trying to press the button too fast when getting a vend at a machine
[21:15] <Stromeko> aZz7eCh: That is not a problem internal or external pullups are going to solve. You need to either go to a current loop interface or differential signaling. It would be best if you'd do this potential-free.
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[21:16] <shiftplusone> well, external pull ups could solve it, depending on how noisy the environment is. But you're saying the hardware is fixed and you can't do much about it?
[21:17] <fury> is there some kind of limit to how long dtoverlay lines can be in config.txt? trying to configure a rotary-encoder here, and i can get relative_axis to be recognized, or linux_axis=8, but not both at the same time when i have steps-per-period=4 present in the line. and if i move that to the end, it's ignored >.>
[21:17] <shiftplusone> Then you're stuck hitting the sweet spot between making sure the button is actually held down for a typical button press period of time, but not shot enough to be a spike.... which is fun.
[21:18] <shiftplusone> fury, yes
[21:18] <shiftplusone> fury, https://www.raspberrypi.org/forums/viewtopic.php?p=1434770#p1434770
[21:18] * agajania (~agajania@frogn.cs.newpaltz.edu) Quit (Client Quit)
[21:18] <shiftplusone> Just found this out today myself
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[21:19] <fury> craaaaaaaaaap. been driving me nuts for days
[21:19] <fury> thanks shiftplusone!
[21:19] <shiftplusone> np
[21:19] <aZz7eCh> Stromeko, current loop interwhat now? differential signalment? holy moly.
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[21:20] <shiftplusone> would just twisting the wire be enough?
[21:20] <fury> ugh. next question is how do i tell dtparam WHICH rotary-encoder instance to change? lol i have two encoders hooked up
[21:20] <aZz7eCh> i was going to ask .... maybe i ahve used completely inappropriate wire for the control circuits
[21:20] <shiftplusone> not sure, fury. Have you asked on the forum? PhilE should be able to help?
[21:21] <fury> haven't yet
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[21:24] <shiftplusone> probably your best bet
[21:24] <Stromeko> aZz7eCh: the typical current loop interface is 4ma/20ma current. No current means the line is broken. Differential signaling means exactly what you think it does: one line goes high, the other gors low. Most disturbances are common mode, so they get rejected.
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[22:05] <laptop2> is it normal to have the thermometer sign blinking all the time
[22:06] <laptop2> on screen (RPi3 model B+)
[22:06] <laptop2> when doing a heavy job on it
[22:06] <lopta> I wonder whether that means it's getting hot.
[22:07] <laptop2> lopta, it does mean that yeah
[22:07] <lopta> Have you tried pointing a little fan at it?
[22:07] <lopta> Is it in a case?
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[22:07] <laptop2> lopta, it's in a case with a heatsink
[22:07] <laptop2> no fan
[22:07] <lopta> Are you overclocking it?
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[22:08] <laptop2> lopta, nope
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[22:08] <laptop2> I mean, it's a 3B+, it's kinda already at its limit out of the factory
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[22:09] <laptop2> kinda surprised by the behavior where it just keeps blinking if it's just at the limit
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[22:14] <lopta> laptop2: If adding a fan isn't practical, have you tried turning down the clock speed a bit?
[22:15] <laptop2> lopta, not yet
[22:16] <lopta> I would think a 40mm fan might be about perfect. If I were more handy at metalwork I'd try building a Pi case with a 40mm fan at one end.
[22:17] * Clarth (~clay@241.ip-144-217-84.net) has joined #raspberrypi
[22:17] <lopta> ...or 60mm fan and narrow it in the middle where the board is. :-)
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[22:23] * fred__tv (~fred__tv@93-46-196-134.ip109.fastwebnet.it) has joined #raspberrypi
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[22:27] <MikeRL100> Hmm. Is there a way to configure an alternative DNS server to use for the Pi 3B+ on Raspbian Stretch? I tried right clicking the networking icon and putting in Cloudflare DNS servers under DNS servers and it doesn't appear to work.
[22:28] * fred__tv_ (~fred__tv@ip-242-138.sn1.clouditalia.com) has joined #raspberrypi
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[22:53] <phinxy_> Is the hardware clock set to UTC on Rpi3?
[22:54] <DanielTheFox> there is no hardware clock on any RPi model
[22:54] <DanielTheFox> :)
[22:54] <DanielTheFox> there might be timers in the SoC, but nothing like an RTC that stores date and preserves it even when the system has no external power
[22:55] <phinxy_> I answered 'yes' and it seems to show the correct local time
[22:55] <DanielTheFox> date and time is always attempted to be fetched after setting up networking
[22:55] <DanielTheFox> it's fetched from internet time server
[22:56] <DanielTheFox> during shutdown, the Pi appears to store the time and date somewhere, and loads that up when mounting the root filesystem (or anywhere nearby? or before?)
[22:57] <DanielTheFox> [citation needed]
[22:57] <phinxy_> So the question becomes "is the software clock set to UTC?"
[22:58] <phinxy_> When Linux does not find an hardware RTC its probably some fallback software thing
[22:58] <DanielTheFox> hmm... Linux highly encourages clock to be UTC
[22:59] <DanielTheFox> software later performs corrections based on timezone
[22:59] <DanielTheFox> but lower level stuff likes being UTC
[22:59] <DanielTheFox> I don't really know how time works on Linux kernel
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[23:08] <Irc2k_> Hi There!
[23:08] <Irc2k_> I need some help with the RasPi3b+
[23:09] <DanielTheFox> Irc2k_, what's going on?
[23:10] <Irc2k_> I want to setup a callflooder to take on a scam company. I have read online this can be achieved using RaspberryPi hitting 20 per min does anyone on this channel have the expertise to help me with this project?
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[23:11] <DanielTheFox> (oh, not me, sorry)
[23:11] <Irc2k_> Cool No problem
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[23:25] <stivs> sounds a bit illegal, depending...
[23:26] <Irc2k_> Isn't it illegal to run a scam operation?
[23:28] <Klaus_Dieter> yes. it is. Please make use of the local authorities to stop them instead of taking the law into your own hands.
[23:28] <Klaus_Dieter> this is illegal in most countries as well
[23:30] * SimonNL (~SimonNL@3E91CDD1.cm-13.dynamic.ziggo.nl) Quit (Quit: Leaving (Close)___If I have said something clever. my apologies \o)
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[23:42] <Irc2k_> Got it
[23:42] <Irc2k_> Any new interesting projects using pi?
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These logs were automatically created by RaspberryPiBot on irc.freenode.net using the Java IRC LogBot.