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pi.jpeg

The Raspberry Pi is a low cost, credit-card sized computer that plugs into a computer monitor or TV, and uses a standard keyboard and mouse. It is a capable little device that enables people to explore computing, and to learn how to program in languages like Scratch and Python. It’s capable of doing everything you’d expect a desktop computer, from browsing the internet and playing HD video, to making spreadsheets, word-processing, and playing games.


What’s more, the Raspberry Pi has the ability to interact with the outside world, and has been used in a wide array of digital maker projects, from music machines and parent detectors to weather stations and tweeting birdhouses with infra-red cameras. We want to see the Raspberry Pi being used by kids all over the world to learn to program and understand how computers work.
:: ZDROJE INFO:: PROJEKTY:: SOFTWARE / OS:: HARDWARE

raspberrypi.org (oficialny web)
raspi.co.uk (blog)
themagpi.com (pdf magazín)
raspberry-pi.sk (fórum)
Pi4Beginners (youtube kanál)

FishPi (zaoceánska loďka)
Pi In The Sky (meteobalón)
Super Nintendo (video)
Android Transporter (video)
DSLR Embed (Canon 5D)
Microwave Pi
PrivateEyePi (DIY alarm)

Linuxové distribúcie (zoznam)
NOOBS (Out of box software)
Raspbian (Debian pre RPi)
Arch Linux ARM
Fedora Remix
QtonPi (Qt5 port)
RaspBMC (XMBC media center)
Google Chromium


Slice of Pi (breakout board)
5Mpx Camera Module (prototyp)






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dusand
 dusand      29.09.2020 - 11:02:12 , level: 1, UP   NEW
Má tu niekto skúsenosti s rozbehaním wifi reprákov (nie bluetooth) s omxplayerom?

Mám takéto repráky https://www.bsacoustic.sk/aktivne-instalacne-reproduktory/ks07wifi/ a potreboval by som, aby cez ne omxplayer hral zvuk z videa.

Samozrejme googlim, ale ak mi tu niekto poradí niečo konkrétne, budem vďačný.

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ulkas
 ulkas      29.09.2020 - 12:43:08 , level: 2, UP   NEW
nieco ako chromecast audio?

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dusand
 dusand      29.09.2020 - 16:22:48 , level: 3, UP   NEW
tie repráky by mali podporovať miracast, ale omxplayer som s tým ešte neprepájal.

Nakoniec to budeme robiť cez kábel, ale naučiť sa to chcem.

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SYNAPSE CREATOR
 urza      03.07.2020 - 15:02:18 [9K] , level: 1, UP   NEW  HARDLINK
Get your own Bitcoin & Lightning Node running - on a RaspberryPi with a nice LCD
https://github.com/rootzoll/raspiblitz


The RaspiBlitz is a do-it-yourself Lightning Node based on LND running together with a Bitcoin-Fullnode on a RaspberryPi 3/4 - with a HDD/SSD and an nice display for easy setup & monitoring.

raspiblitz.jpg


lightning-hack-day/ 2020-06-21-rootzoll-openoms-raspiblitz
https://diyhpl.us/wiki/transcripts/lightning-hack-day/2020-06-21-rootzoll-openoms-raspiblitz/

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bdY
 bdY      24.06.2020 - 00:19:52 [4K] , level: 1, UP   NEW
https://twitter.com/0martint/status/1274012749174013954

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SYNAPSE CREATOR
 misenka      22.06.2020 - 19:26:14 , level: 1, UP   NEW  HARDLINK
51SPXyjO+jL._AC_SS350_.jpg
nepovaluje sa doma niekomu takato redukcia ? USB 3.0 to SATA
viem sa aj po nu zastavit v ramci BA a PD a miest po ceste
(Vyrabam si mini NASko z raspberry pi, recyklujem stary HDD a toto mi chyba).
dik.

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maniac
 maniac      11.06.2020 - 13:16:41 (modif: 12.06.2020 - 17:28:43) [2K] , level: 1, UP   NEW !!CONTENT CHANGED!!
dosiel samsung 860PRO , pripojeny cez Evolveo Tiny I-II USB-C case:

root@rpi4-8gb:/home/pi# hdparm -t /dev/sda

/dev/sda:
Timing buffered disk reads: 952 MB in 3.00 seconds = 317.20 MB/sec


na starsom arme kde mam 850PRO pripojene cez E-Sata to ide tak max 100MB/s

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egres
 egres      16.06.2020 - 13:11:45 , level: 2, UP   NEW
pocuj maniac, naco to ale vlastne riesis tie prenosy? mas nejaku aplikaciu (nie v zmysle SW, ale v zmysle "ulohy rPi") ktora potrebuje take rychlosti a vie Ti to nieco priniest?

lebo mam doma rPi 1, 2, 3, 4 kazde ma nejaku ulohu a 4 pouzival syn ako svoje PC na veci do skoly - v pohode nejake office tasky, textove dokumenty, prezosku a podobne, emailovanie s ucitelmi,... a tam boli chvilami prestoje. nejak som sa v tom nevrtal, ci boli cakania na RW operacie, ale proste pride mi ten procak stale tak pomaly, ze zebytocne mu dat disk, co vie pisat a citat v stovkach MBps, ci?

lebo vzdy je nejaky zvysny SSD poruke :) a ak by som nasiel nieco spolahlivejsie ako SD karta z dlhodobeho hladiska (to je jedine, co mi odchadza na tych Pickach) a ak by to odstranilo tie chvilkove lagy. lebo renderovanie stranok asi rychlejsie nebude. ci? :)

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maniac
 maniac      16.06.2020 - 13:35:24 [1K] , level: 3, UP   NEW
ta rychlost ma zauima preto, lebo desiatky x-gigabajtovych maildirov, databaza (autentifikacia sluzieb + lamp weby) a narazove up/downloady

keby som to pouzival ako desktop, tak ma to zauima preto, lebo sa cely system stane sviznejsim (aj rotacne disky su casto rychlejsie ako thie shitne SD karty co ludia davaju do PIcok :) )

v podstate ked je rychly disk (resp vie vela iops), tak to pomaha s celkovo sviznejsimi odozvami a setri to CPU cas ktory je pri tychto slabsich CPU cenna komodita

tym ze tu budem mat 8GB ram tak ma to asi az tak nebude trapit, ale pri 4GB nebolo moc volnej RAM na disk cache a teda rychly disk to pomahal suplovat

ad SD karty - dlhorocne skusenosti mi potvrdzuju ze na hocico serioznejsie treba kokretne SANDISK EXTREME PRO karty (ich cena je uz dnes ok, kedysi boli extremne drahe) - su rychle a zatial mi ani jedna neodisla

ad ssd disk - chcel som presne tento samsung, pretoze doteraz som 5 rokov bezal na 850pro a este stale vykazuje ze je v cca 50% zivotnosti (pocet prepisov).

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egres
 egres      16.06.2020 - 20:47:19 , level: 4, UP   NEW
a uz mas ten FW, co vie bootovat rovno z SSD? a ta 850 musi mat osobitne napajanie, ci to potiahne ten usb3 co je na rPi?

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maniac
 maniac      16.06.2020 - 21:23:21 , level: 5, UP   NEW
fw som neflashoval, nepotrebujem aby sa kernel nutne tahal priamo z ssdcka. SD kartu aj nadalej planujem vyuzivat ako backup a na boot kernelu

az vyjde oficko verzia a nebude to mat nejake drawbacks tak to asi skusim

a napajanie tej 860pro (850pro mam na cuboxe) len priamo z rpi - ten evolveo case co mam ani nema podporu na externe napajanie

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ziman
 ziman      16.06.2020 - 13:25:59 , level: 3, UP   NEW
I/O je mega pomale na mojich raspberry pickach (aspon teda na ich SD kartach), som si vsimol

taky pacman -Syu alebo aptitude upgrade, co je prevazne I/O proces, trva cele veky

procesor nie je az taky strasny, trebars firefox na mojom RPi3B bezi relativne vpoho (a to je z roku 2016)

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forcer
 forcer      12.06.2020 - 22:05:39 [1K] , level: 2, UP   NEW
mal som evolveo usb->sata adapter a pri dlhej prevadzke sa mu prehrieval chipset a odpajal disky, nemal si s nim zatial problem?
najlepsie skusenosti mam zatial so StarTech adaptermi, mozem skusit neskor pripojit na moju rpi4 a skusit aku ma peformance na mSATA 850evo

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maniac
 maniac      15.06.2020 - 12:10:04 , level: 3, UP   NEW
pozeram ten chipset co ma ten moj evolveo:

[ 1.871533] usb 2-2: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[ 1.898537] usb 2-2: New USB device found, idVendor=2109, idProduct=0715, bcdDevice= 0.00
[ 1.898551] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1.898562] usb 2-2: Product: VLI Product String
[ 1.898574] usb 2-2: Manufacturer: VLI Manufacture String
[ 1.898584] usb 2-2: SerialNumber: 000000123C02
[ 1.912374] scsi host0: uas
[ 4.690274] scsi 0:0:0:0: Direct-Access Samsung SSD 860 PRO RVM0 PQ: 0 ANSI: 6
[ 4.692904] sd 0:0:0:0: [sda] 2000409264 512-byte logical blocks: (1.02 TB/954 GiB)
[ 4.693104] sd 0:0:0:0: [sda] Write Protect is off
[ 4.693118] sd 0:0:0:0: [sda] Mode Sense: 2f 00 00 00
[ 4.693483] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 4.694372] sd 0:0:0:0: [sda] Optimal transfer size 33553920 bytes
[ 4.697486] sda: sda1 sda2 sda3 sda4
[ 4.701160] sd 0:0:0:0: [sda] Attached SCSI disk


je to to iste co mas ty?

na akom OS ti to vypadavalo?

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forcer
 forcer      16.06.2020 - 10:55:34 [1K] , level: 4, UP   NEW
nemam ten evolveo poruke, aby som zistil aky to bol chipset, viem len ze som to kupoval asi 2 roky dozadu a bol to cisto usb3 controller - vypadavalo mi to ma macu, na androide aj na ubuntu servri - niekedy vydrzal den, ale vacsinou do 6 hodin prestal reagovat.

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maniac
 maniac      16.06.2020 - 12:43:04 , level: 5, UP   NEW
dik, vyzera to tak ze tento usb-c uz taky problem nema (klop klop)

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maniac
 maniac      14.06.2020 - 17:28:40 , level: 3, UP   NEW
tak dal som 4x paralelne dd z disku do dev null a preslo ok
potom som rsyncol okolo 300GB na ten disk a tiez ok
takze vyzera ze to poriesili, alebo mozno ze ta 860tka sa moc nezahrieva - teploty disku boli cely cas pod 40'C

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forcer
 forcer      15.06.2020 - 10:45:28 (modif: 15.06.2020 - 10:46:17), level: 4, UP   NEW !!CONTENT CHANGED!!
Timing cached reads: 1716 MB in 2.00 seconds = 858.31 MB/sec
Timing buffered disk reads: 1098 MB in 3.00 seconds = 365.82 MB/sec

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maniac
 maniac      15.06.2020 - 12:11:54 , level: 5, UP   NEW
hmhm ti to ide o cca 40MB/s rychlejsie ako mne, zeby 850pro bola rychlejsia ako 860?
ja tam mam tento kernel: Linux rpi4-8gb 5.4.42-v8+ #1319 SMP PREEMPT Wed May 20 14:18:56 BST 2020 aarch64 GNU/Linux
je to beta 64bitoveho raspios

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forcer
 forcer      15.06.2020 - 13:12:09 (modif: 15.06.2020 - 13:43:45), level: 6, UP   NEW !!CONTENT CHANGED!!
ja som to skusal na 32bit, lebo 64 neni este stable.
btw ja pouzivam 860evo mSATA (podla mna to bude usb->sata adapterom, nie diskom)

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forcer
 forcer      14.06.2020 - 23:30:29 (modif: 14.06.2020 - 23:30:40), level: 4, UP   NEW !!CONTENT CHANGED!!
disk samotny to vklude zvladal, ale usb controller isiel srat asi po pol dni prevadzky. idem skusit ten hdparm benchmark na svojom.

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maniac
 maniac      12.06.2020 - 22:22:14 , level: 3, UP   NEW
zatial som to evolveo nezatazil, toto bude snad iny chipset (usb-c 10gbps pisu :) ) ale dik za tip, idem tam rovno skusit zatazit

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ulkas
 ulkas      12.06.2020 - 11:15:51 , level: 2, UP   NEW
stare rpi mali sharovanu zbernicu a nevytiahol si z toho viac ako par megabajtov/s.
mozno nejake benchmarky priamo na disku ti pojdu plnou rychlostou, ale ak to ma sluzit ako server a data tecu cez rpi najprv, tak je tam tato hranica.

neviem uz ale, ako je na tom najnovsie rpi.

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maniac
 maniac      12.06.2020 - 14:33:19 , level: 3, UP   NEW
myslim ze to bude non-issue

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dedomraz
 dedomraz      11.06.2020 - 18:48:01 , level: 2, UP   NEW
naco ti je treba takato performance na rpi? naozaj sa zo zvedavosti pytam...

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maniac
 maniac      11.06.2020 - 21:10:10 (modif: 11.06.2020 - 21:12:37) [14K] , level: 3, UP   NEW !!CONTENT CHANGED!!
bezim na nom "komunitny" server, cca
60 LAMP webov
40 mail domen s 100+ mailboxami (including antispam+antivir)
50 dns zon
nagios pre 60 hostov a 380 sluzieb

a potom shelly, rozne proxy etc..

takto to vyzera teraz na cubox i-pro 4x4 ktory planujem nahradit tym rpickom
power.png

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Prospero
 Prospero      12.06.2020 - 17:16:20 , level: 4, UP   NEW
Uplna pecka kamo...Uprimne, mal by si o tom napisat paper.

Moji studenti pracuju na niecom podobnom, teraz uz len presvedcit vedenie Univerzity ze toto je buducnost...

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scourge
 scourge      12.06.2020 - 01:12:50 , level: 4, UP   NEW
tak na tomto bezal do predvcera edsystem

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acidmilk
 acidmilk      11.06.2020 - 22:32:22 , level: 4, UP   NEW
chcel by som potom vidiet report ako to rpi toto cele utiahne, lebo nechce sa mi verit ;)

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maniac
 maniac      12.06.2020 - 14:32:30 [1K] , level: 5, UP   NEW
s radostou dodam ked to preklopim, takto to zvlada doteraz ten cubox:

Screenshot-2020-06-12-at-14.20.30.png

Screenshot-2020-06-12-at-14.23.41.png

Screenshot-2020-06-12-at-14.30.00.png

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dobso
 dobso      11.06.2020 - 22:24:08 , level: 4, UP   NEW
downsizing :)

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maniac
 maniac      12.06.2020 - 14:18:39 , level: 5, UP   NEW
verim ze o tom je buducnost :)