{"id":39479,"date":"2019-10-31T22:33:41","date_gmt":"2019-10-31T19:33:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/5-sposobov-poleznogo-ispolzovaniya-raspberry-pi\/"},"modified":"2019-10-31T22:33:41","modified_gmt":"2019-10-31T19:33:41","slug":"5-sposobov-poleznogo-ispolzovaniya-raspberry-pi","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/administrirovanie\/5-sposobov-poleznogo-ispolzovaniya-raspberry-pi","title":{"rendered":"5 na\u010dinov koristne uporabe Raspberry Pi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Pozdravljen, Habr.<\/p>\n<p>Raspberry Pi ima verjetno skoraj vsak doma, in upam, da lahko domnevam, da mnogim le\u017ei neuporabljen. Toda Raspberry ni le dragocena krzna, temve\u010d tudi povsem zmogljiv ra\u010dunalnik brez ventilatorja z Linuxom. Danes bomo raziskali uporabne mo\u017enosti Raspberry Pi, za katere ne bo treba pisati kode. <br \/>\n<img decoding=\"async\" alt=\"5 na\u010dinov koristne uporabe Raspberry Pi\" src=\"\/wp-content\/uploads\/2019\/10\/e69119cc5036df2ca55ee5cea97fe30d.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nZa tiste, ki jih zanima, podrobnosti so spodaj. \u010clanek je namenjen za\u010detnikom.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<i>Napomena<\/i>: \u010dlanek je namenjen za\u010detnikom, vendar morajo imeti vsaj osnovno razumevanje, kaj je IP naslov, kako dostopati do Raspberry Pi preko SSH s pomo\u010djo putty ali katerega koli drugega terminala, in kako urejati datoteke z urejevalnikom nano. Tokrat ne bom 'obremenjeval' bralcev s kodo za Python, programiranja tukaj ne bo. Za vse spodaj navedeno bo dovolj le ukazna vrstica. Kak\u0161na je povpra\u0161evanje po tak\u0161nem formatu, bom spremljal po ocenah besedila.<\/p>\n<p>Seveda ne bom obravnaval povsem o\u010ditnih stvari, kot so FTP stre\u017enik ali omre\u017eni delilnik. Spodaj sem poskusil izpostaviti nekaj bolj ali manj uporabnega in izvirnega.<\/p>\n<p>Preden za\u010dnemo namestiti kaj, je pomembno <b>nasvet<\/b>: pravilen napajalnik (najbolje blagovne znamke s 2.5A, ne pa noname polnilec od telefona) in hladilnik za procesor sta izredno pomembna za stabilno delovanje Raspberry Pi. Brez tega lahko Raspberry zamrzne, lahko se pojavijo napake pri prenosu datotek itd. Prevara takih napak je v tem, da se pojavijo le ob\u010dasno, na primer pri vrhni obremenitvi CPU ali ob pisanju velikih datotek na SD kartico.<\/p>\n<p>Pred namestitvijo kakr\u0161nih koli komponent je priporo\u010dljivo posodobiti sistem, sicer se lahko stare povezave za ukaz apt ne uspejo:<\/p>\n<pre><code class=\"bash\">sudo apt-get update<\/code><\/pre>\n<p>\nSedaj lahko za\u010dnemo z namestitvijo in nastavitvijo.<\/p>\n<h2>1. WiFi dostopna to\u010dka<\/h2>\n<p>\nRaspberry Pi lahko enostavno spremenimo v brez\u017ei\u010dno dostopno to\u010dko, pri \u010demer ne bo treba kupovati ni\u010desar, saj je WiFi 'vgrajen'. Za to je potrebno namestiti 2 komponente: hostapd (demon dostopne to\u010dke) in dnsmasq (DNS\/DHCP stre\u017enik).<\/p>\n<p>Namestimo dnsmasq in hostapd:<\/p>\n<pre><code class=\"bash\">sudo apt-get install dnsmasq hostapd<\/code><\/pre>\n<p>\nDolo\u010dimo stati\u010dni IP naslov, ki ga bo imel Raspberry Pi v WiFi omre\u017eju. Za to je potrebno urediti datoteko dhcpcd.conf, vnesite ukaz <i>sudo nano \/etc\/dhcpcd.conf<\/i>. V datoteko je treba dodati naslednje vrstice:<\/p>\n<pre><code class=\"bash\">interface wlan0\n  static ip_address=198.51.100.100\/24\n  nohook wpa_supplicant\n<\/code><\/pre>\n<p>\nKot lahko vidite, bo na\u0161 Raspberry Pi v WiFi omre\u017eju imel naslov 198.51.100.100 (to je pomembno zapomniti, \u010de bo na njem deloval kak\u0161en stre\u017enik, katerega naslov boste morali vnesti v brskalnik).<\/p>\n<p>Nato moramo aktivirati IP posredovanje, za kar izvr\u0161imo ukaz <i>sudo nano \/etc\/sysctl.conf<\/i> in odkomentiramo vrstico <i>net.ipv4.ip_forward=1<\/i>.<\/p>\n<p>Zdaj moramo nastaviti DHCP stre\u017enik \u2014 ta bo dodeljeval IP naslove povezanim napravam. Vpi\u0161emo ukaz <i>sudo nano \/etc\/dnsmasq.conf<\/i> in dodamo naslednje vrstice:<\/p>\n<pre><code class=\"bash\">interface=wlan0\ndhcp-range=198.51.100.1,198.51.100.99,255.255.255.0,24h\n<\/code><\/pre>\n<p>\nKot lahko vidite, bodo povezane naprave prejele IP naslove v razponu od 198.51.100.1 do 198.51.100.99.<\/p>\n<p>Nazadnje je pri\u0161el \u010das, da konfiguriramo Wi-Fi. Uredimo datoteko <i>\/etc\/default\/hostapd<\/i> in vnesemo vrstico <i>DAEMON_CONF=\u00bb\/etc\/hostapd\/hostapd.conf\u00ab<\/i>. Zdaj bomo uredili datoteko hostapd.conf, tako da vpi\u0161emo ukaz <i>sudo nano \/etc\/hostapd\/hostapd.conf<\/i>.<br \/>\nVpi\u0161emo parametre dostopne to\u010dke:<\/p>\n<pre><code class=\"bash\">interface=wlan0\ndriver=nl80211\nssid=Raspberry Pi\nhw_mode=g\nchannel=7\nwmm_enabled=0\nmacaddr_acl=0\nauth_algs=1\nignore_broadcast_ssid=0\nwpa=2\nwpa_passphrase=12345678\nwpa_key_mgmt=WPA-PSK\nwpa_pairwise=TKIP\nrsn_pairwise=CCMP<\/code><\/pre>\n<p>\nPomembno je opozoriti na parametre \u201essid\u201c (ime dostopne to\u010dke), \u201ewpa_passphrase\u201c (geslo), \u201echannel\u201c (\u0161tevilka kanala) in \u201ehw_mode\u201c (delovni na\u010din, a = IEEE 802.11a, 5 GHz, b = IEEE 802.11b, 2.4 GHz, g = IEEE 802.11g, 2.4 GHz). Na \u017ealost ni avtomatske izbire kanala, tako da boste morali sami izbrati najmanj obremenjen kanal WiFi.<\/p>\n<p><b>Pomembno<\/b>: v tem testnem primeru je navedeno geslo 12345678, v resni\u010dni dostopni to\u010dki pa je treba uporabiti nekoliko bolj zapleteno. Obstajajo programi za izvajanje napadov bruteforce, ki lahko dostopno to\u010dko s preprostim geslom zlahka prelomijo. Deljenje interneta s tujimi uporabniki pa ob aktualnih zakonih lahko prinese te\u017eave.<\/p>\n<p>Vse je pripravljeno, lahko aktiviramo vse storitve. <\/p>\n<pre><code class=\"bash\">sudo systemctl unmask hostapd\nsudo systemctl enable hostapd\nsudo systemctl start hostapd\nsudo systemctl reload dnsmasq<\/code><\/pre>\n<p>\nZdaj bi morali \u017ee videti novo WiFi dostopno to\u010dko na seznamu omre\u017eij. Vendar pa je za dostop do interneta potrebno aktivirati posredovanje paketov iz Ethernet-a v WLAN, za kar vpi\u0161emo ukaz <i>sudo nano \/etc\/rc.local<\/i> in dodamo vrstico za nastavitev iptables:<\/p>\n<pre><code class=\"bash\">sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE\n<\/code><\/pre>\n<p>\nSedaj je vse. Ponovno za\u017eenite Raspberry Pi in \u010de je bilo vse opravljeno pravilno, bomo lahko videli dostopno to\u010dko in se nanjo pove\u017eemo.<\/p>\n<p><img decoding=\"async\" alt=\"5 na\u010dinov koristne uporabe Raspberry Pi\" src=\"\/wp-content\/uploads\/2019\/10\/fe586866e572ea9950b5ad5f6fcfe9e7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKot lahko vidite, hitrost ni tako slaba in tak WiFi je povsem uporaben.<\/p>\n<p>Mimogrede, majhna <b>nasvet<\/b>: spremenite omre\u017eno ime Raspberry Pi lahko tako, da vnesete ukaz <i>sudo raspi-config<\/i>. Privzeto je enako (presene\u010denje:) raspberrypi. To je verjetno splo\u0161no znano. Vendar pa ne vsi vedo, da je to ime na voljo tudi v lokalnem omre\u017eju, vendar je treba dodati \u00ab.local\u00ab. Na primer, za dostop do Raspberry Pi preko SSH lahko vpi\u0161ete ukaz <i>putty pi@raspberrypi.local<\/i>. Tu je res en odtenek: deluje v Windows in Linux, vendar ne deluje v Androidu \u2014 tam boste \u0161e vedno morali ro\u010dno vnesti IP-naslov.<\/p>\n<h2>2. Medijski stre\u017enik<\/h2>\n<p>\nObstaja 1001 na\u010din za izdelavo medijskega stre\u017enika na Raspberry Pi, obravnaval bom le najpreprostej\u0161ega. Recimo, da imamo najljub\u0161o zbirko MP3 datotek, ki bi jo radi delili v lokalni mre\u017ei z vsemi medijskimi napravami. Na Raspberry Pi bomo namestili stre\u017enik MiniDLNA, ki nam to omogo\u010da. <\/p>\n<p>Za namestitev vnesite ukaz <i>sudo apt-get install minidlna<\/i>. Nato je potrebno nastaviti konfiguracijo, tako da vnesete ukaz <i>sudo nano \/etc\/minidlna.conf<\/i>. Tam je treba dodati le eno vrstico, ki dolo\u010da pot do na\u0161ih datotek: <i>media_dir=\/home\/pi\/MP3<\/i> (pot seveda lahko biti druga\u010dna). Po zaprtju datoteke, ponovno za\u017eenite storitev:<\/p>\n<p><i>sudo systemctl restart minidlna<\/i><\/p>\n<p>\u010ce smo vse naredili pravilno, bomo dobili pripravljen medijski stre\u017enik v lokalni mre\u017ei, s katerega lahko predvajamo glasbo preko namiznega WiFi radia ali preko VLC predvajalnika v Androidu:<\/p>\n<p><img decoding=\"async\" alt=\"5 na\u010dinov koristne uporabe Raspberry Pi\" src=\"\/wp-content\/uploads\/2019\/10\/07991c505022aa823c51bb7176540d90.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Nasvet<\/b>: prena\u0161anje datotek na Raspberry Pi je zelo priro\u010dno z uporabo WinSCP \u2014 ta program omogo\u010da delo s mapami RPi prav tako enostavno, kot z lokalnimi.<\/p>\n<p><img decoding=\"async\" alt=\"5 na\u010dinov koristne uporabe Raspberry Pi\" src=\"\/wp-content\/uploads\/2019\/10\/7ebb1fd564575179d774ebebb61aecac.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>3. SDR sprejemnik<\/h2>\n<p>\n\u010ce imamo sprejemnik RTL-SDR ali SDRPlay, ga lahko uporabimo na Raspberry Pi s programom GQRX ali CubicSDR. To bo omogo\u010dilo avtonomen in tiho SDR sprejemnik, ki lahko deluje tudi neprekinjeno.<\/p>\n<p>Opravi\u010dujem se za kakovost posnetka zaslona s televizorja:<\/p>\n<p><img decoding=\"async\" alt=\"5 na\u010dinov koristne uporabe Raspberry Pi\" src=\"\/wp-content\/uploads\/2019\/10\/8f466f8eb64a37c383861b5dd791c81c.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nZ uporabo RTL-SDR ali SDRPlay je mo\u017eno sprejemati razli\u010dne radijske signale s frekvenco do 1GHz (tudi nekoliko vi\u0161je). Na primer, lahko poslu\u0161ate ne le obi\u010dajno FM radio, temve\u010d tudi pogovore pilotov ali drugih slu\u017eb. Mimogrede, radioamaterji lahko z Raspberry Pi sprejemajo, de\u0161ifrirajo in po\u0161iljajo signale na stre\u017enik <noindex><a rel=\"nofollow\" href=\"https:\/\/www.rtl-sdr.com\/tutorial-setting-up-a-low-cost-qrp-ft8-jt9-wspr-etc-monitoring-station-with-an-rtl-sdr-v3-and-raspberry-pi-3\/\">WSPR in drugih digitalnih na\u010dinov<\/a><\/noindex>. <\/p>\n<p>Podrobna obravnava SDR radia presega okvire tega \u010dlanka, podrobneje pa lahko preberete <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450534\/\">ovde<\/a><\/noindex>. <\/p>\n<h2>4. Stre\u017enik za \u201cpametni dom\u201d<\/h2>\n<p>\nTisti, ki \u017eelijo svoj dom narediti bolj \u201epametnega\u201c, lahko uporabijo brezpla\u010den program OpenHAB. <\/p>\n<p><img decoding=\"async\" alt=\"5 na\u010dinov koristne uporabe Raspberry Pi\" src=\"\/wp-content\/uploads\/2019\/10\/78d1b38bb45f4705276cf010b63f6927.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTo je ve\u010d kot preprosta programska oprema; to je celoten okvir z razli\u010dnimi vti\u010dniki in skripti, ki omogo\u010dajo upravljanje razli\u010dnih naprav (Z-Wave, Philips Hue itd.). Tisti, ki \u017eelijo, si lahko podrobneje ogledajo uradno spletno stran. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openhab.org\/\">https:\/\/www.openhab.org<\/a><\/noindex>.<\/p>\n<p>Mimogrede, ko \u017ee govorimo o 'pametni hi\u0161i', na Raspberry Pi lahko deluje MQTT stre\u017enik, ki ga lahko uporabljajo razli\u010dne lokalne naprave.<\/p>\n<h2>5. Odjemalec za FlightRadar24<\/h2>\n<p>\n\u010ce ste ljubitelj letalstva in \u017eivite v regiji, kjer pokritost FlightRadar pu\u0161\u010da \u017eeljno, lahko pomagate skupnosti in vsem popotnikom z namestitvijo sprejemnika pri vas. Za to potrebujete le RTL-SDR sprejemnik in Raspberry Pi. Kot bonus boste pridobili brezpla\u010den dostop do Pro ra\u010duna FlightRadar24.<\/p>\n<p><img decoding=\"async\" alt=\"5 na\u010dinov koristne uporabe Raspberry Pi\" src=\"\/wp-content\/uploads\/2019\/10\/84d67383fd6b528315789d2ddfc3f413.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPodrobna navodila <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/408003\/\">so \u017ee bila objavljena<\/a><\/noindex> na Hbru.<\/p>\n<h2>Zaklju\u010dek<\/h2>\n<p>\nSeveda tukaj ni navedeno vse. Raspberry Pi ima precej\u0161njo ra\u010dunalni\u0161ko mo\u010d in se lahko uporablja za razli\u010dne naloge, od retro igralnih konzol ali videonadzora do prepoznavanja registrskih \u0161tevilk avtomobilov ali celo kot storitev za astronomijo. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.instructables.com\/id\/Wireless-All-Sky-Camera\/\">all-sky kamere<\/a><\/noindex> za opazovanje meteorjev. <\/p>\n<p>Mimogrede, to, kar je napisano, velja ne le za Raspberry Pi, temve\u010d tudi za razli\u010dne 'klone' (Asus Tinkerboard, Nano Pi itd.), vse programe bo verjetno mo\u017eno zagnati tudi tam.<\/p>\n<p>\u010ce bo ob\u010dinstvo pokazalo zanimanje (kar bo dolo\u010deno na podlagi ocen \u010dlanka), lahko temo nadaljujemo. <\/p>\n<p>In kot obi\u010dajno, vsem uspe\u0161ne eksperimente.<br \/>\n<br \/>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/472778\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0438\u0432\u0435\u0442 \u0425\u0430\u0431\u0440. Raspberry Pi \u043d\u0430\u0432\u0435\u0440\u043d\u043e\u0435 \u0435\u0441\u0442\u044c \u0434\u043e\u043c\u0430 \u043f\u043e\u0447\u0442\u0438 \u0443 \u043a\u0430\u0436\u0434\u043e\u0433\u043e, \u0438 \u0440\u0438\u0441\u043a\u043d\u0443 \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u043e\u0436\u0438\u0442\u044c, \u0447\u0442\u043e \u0443 \u043c\u043d\u043e\u0433\u0438\u0445 \u043e\u043d\u0430 \u0432\u0430\u043b\u044f\u0435\u0442\u0441\u044f \u0431\u0435\u0437 \u0434\u0435\u043b\u0430. \u0410 \u0432\u0435\u0434\u044c Raspberry \u044d\u0442\u043e \u043d\u0435 \u0442\u043e\u043b\u044c\u043a\u043e \u0446\u0435\u043d\u043d\u044b\u0439 \u043c\u0435\u0445, \u043d\u043e \u0438 \u0432\u043f\u043e\u043b\u043d\u0435 \u043c\u043e\u0449\u043d\u044b\u0439 fanless-\u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440 \u0441 Linux. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u043c\u044b \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u043f\u043e\u043b\u0435\u0437\u043d\u044b\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 Raspberry Pi, \u0434\u043b\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043a\u043e\u0434 \u043f\u0438\u0441\u0430\u0442\u044c \u043d\u0435 \u043f\u0440\u0438\u0434\u0435\u0442\u0441\u044f \u0441\u043e\u0432\u0441\u0435\u043c. \u0414\u043b\u044f \u0442\u0435\u0445 \u043a\u043e\u043c\u0443 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e, \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u043e\u0441\u0442\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":39480,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-39479","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0438\u0432\u0435\u0442 \u0425\u0430\u0431\u0440. 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