{"id":30490,"date":"2019-10-31T21:35:49","date_gmt":"2019-10-31T18:35:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/server-v-oblakah-itogi-proekta\/"},"modified":"2019-10-31T21:35:49","modified_gmt":"2019-10-31T18:35:49","slug":"server-v-oblakah-itogi-proekta","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/administrirovanie\/server-v-oblakah-itogi-proekta","title":{"rendered":"Server u oblaku: Rezultati projekta","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Prijatelji, vreme je da sumiramo na\u0161 projekat-takmi\u010denje \"Server u oblacima\". Ako neko nije upu\u0107en, napravili smo zabavan geek projekat: sastavili smo mali server na Raspberry Pi 3, dodali GPS pra\u0107enje i senzore, sve to stavili na balon i poverili prirodnim silama. Gde \u0107e balon sleteti, znaju samo bogovi vetrova i za\u0161titnici vazduhoplovstva, pa smo svima ponudili da postave ta\u010dke na mapi \u2014 \u010dije ta\u010dke budu najbli\u017ee stvarnom mestu sletanja, dobijaju \u201efinu\u201c nagradu.<\/p>\n

\"Server<\/a><\/noindex><\/p>\n

Dakle, na\u0161 server je ve\u0107 leteo u oblake, i vreme je da sumiramo rezultate na\u0161eg takmi\u010denja.
\n<\/a><\/noindex>
\nLinkovi na prethodne objave o takmi\u010denju<\/b><\/p>\n

    \n
  1. Objava o regati<\/a><\/noindex> (nagrada za prvo mesto u na\u0161em takmi\u010denju \u2014 u\u010de\u0161\u0107e u jedrili\u010darskoj regati AFR (Another F*cking Race)<\/a><\/noindex>, koja \u0107e se odr\u017eati od 3. do 10. novembra u Saronskom zalivu (Gr\u010dka) u saradnji sa timom RUVDS i Habrom.<\/li>\n
  2. Kako smo pravili \"hardverski deo<\/a><\/noindex>\" projekta \u2014 za ljubitelje geek pornografije, sa detaljima i analizom koda.<\/li>\n
  3. Mega post o projektu<\/a><\/noindex> sa potpunim opisom.<\/li>\n
  4. Web stranica projekta<\/noindex>, na kojem je bilo mogu\u0107e pratiti kretanje balona i telemetriju u realnom vremenu.<\/li>\n
  5. Izve\u0161taj<\/a><\/noindex> sa mesta lansiranja balona.<\/li>\n<\/ol>\n

    I iskustvo, sine te\u0161kih gre\u0161aka<\/h2>\n

    \nKao \u0161to se se\u0107ate, planirali smo da prenosimo podatke sa servera putem GSM modema. To je bio osnovni kanal za prenos informacija. Mislili smo da smo predvideli sve iznena\u0111enja sa pokriveno\u0161\u0107u mobilne mre\u017ee, stavljaju\u0107i u modem dve SIM kartice operatera sa najboljim pokrivenjem u Dmitrovskom okrugu. Osim toga, modem je imao dobru omnidirekcionu antenu. Ali, kako to obi\u010dno biva, \u010dovek planira, a operateri organizuju. Kada je balon uzleteo na visinu iznad 500 metara (visina Ostanjinske televizijske kule), mobilna veza je potpuno nestala. <\/p>\n

    \"Server
    \n
    \nRazmi\u0161ljaju\u0107i unazad, to se \u010dini o\u010diglednim, ali unazad i ne misli se. Naravno, mobilne antene su namenjene pokrivanju na zemlji, a ne u vazduhu. Njihove dijagrame usmerenosti \"udaru\" du\u017e reljefa i ne \"osvetljavaju\" oblake. Tako da mobilna komunikacija na visini polu-kilometra i vi\u0161e \u2014 to je samo slu\u010dajno preusmeravanje cveta neke antene. Tako da polovina veze sa balonom preko mobilnog kanala nije postojala. A tokom spu\u0161tanja, kada smo se spustili ispod 500 metara, mobilna veza ponovo je proradila.<\/p>\n

    Kako smo dobili telemetriju sa lopte? Hvala duplom kanalu za prenos podataka. Instalirali smo na loptu paket LoRa radio veze<\/a><\/noindex>, koji radi na frekvenciji od 433 MHz. <\/p>\n

    \"Server
    \n
    \nPropusnost mu nije velika, ali za na\u0161e potrebe je bila sasvim dovoljna. \u0160to se ti\u010de odre\u0111ivanja lokacije lopte putem GPS-a, nije bilo nikakvih problema, traker je radio bez smetnji.<\/p>\n

    \"Server
    \n
    \nA tokom leta se ispostavilo da je USB kabl koji je povezivao telemetrijski modul sa Raspberry Pi 3 bio neispravan. Na zemlji je radio, ali je u vazduhu otkazao. Verovatno se upla\u0161io visine. Gre\u0161ku kabla smo otkrili tek nakon sletanja. Na sre\u0107u, uspeli smo da uspostavimo prenos podataka direktno sa telemetrijskog modula putem LoRa.<\/p>\n

    \"Server
    \n
    \n\"Server
    \n
    \n\"Server
    \n<\/p>\n

    I dobra vest<\/h2>\n

    \nSre\u0107a se osmehnula korisnicima Habr-a @severov_info<\/a><\/noindex> u prvom mestu, @MAXXL<\/a><\/noindex> na drugom mestu i @evzor<\/a><\/noindex> na tre\u0107em mestu! Najsre\u0107nijeg u novembru \u010deka hrpa iskustava (nadamo se, prijatnih) od u\u010de\u0161\u0107a u afri\u010dkoj regati AFR<\/a><\/noindex>, a dobitnicima drugog i tre\u0107eg mesta uskoro \u0107emo pokloniti dobre pametne telefone. I naravno, svima trojici u poklon besplatna najam virtuelnog servera od RUVDS.<\/p>\n

    \"Server
    \n
    \n\"Server
    \n
    \nKako je sve pro\u0161lo mo\u017eete videti u ovom malom videu: <\/p>\n

    \r\n \"Predvajaj\r\n
    <\/div>\r\n <\/div><\/center>
    \n
    Izvor:     habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":22488,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-30490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Server u oblacima: Rezultati projekta | ProHoster","description":"Prijatelji, vreme je da sumiramo rezultate na\u0161eg projekta-takmi\u010denja \u201eServer u 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