{"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\/sv\/blog\/administrirovanie\/server-v-oblakah-itogi-proekta","title":{"rendered":"Server i molnen: Projektets resultat","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V\u00e4nner, det \u00e4r dags att sammanfatta v\u00e5rt projekt-t\u00e4vling \"Server i molnen\". F\u00f6r dem som inte \u00e4r medvetna om det, s\u00e5 skapade vi ett roligt geek-projekt: vi byggde en liten server p\u00e5 Raspberry Pi 3, ansl\u00f6t en GPS-tracker och sensorer, laddade allt detta p\u00e5 en luftballong och \u00f6verl\u00e4mnade det till naturens krafter. Var ballongen landar vet endast vindgudarna och luftfartens skyddshelgon, s\u00e5 vi uppmanade alla som ville att s\u00e4tta punkter p\u00e5 kartan \u2014 de vars punkter ligger n\u00e4rmast den faktiska landningsplatsen f\u00e5r \"l\u00e4ckra\" priser.<\/p>\n

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

S\u00e5, v\u00e5r server har redan flugit i molnen, och det \u00e4r dags att sammanfatta v\u00e5r t\u00e4vling.
\n<\/a><\/noindex>
\nL\u00e4nkar till tidigare publikationer om t\u00e4vlingen<\/b><\/p>\n

    \n
  1. Inl\u00e4gg om regattan<\/a><\/noindex> (priset f\u00f6r f\u00f6rsta plats i v\u00e5r t\u00e4vling \u2014 deltagande i segelt\u00e4vlingen AFR (Another F*cking Race)<\/a><\/noindex>, som kommer att \u00e4ga rum mellan 3 och 10 november i Saroniska bukten (Grekland) tillsammans med teamet RUVDS och Habr.<\/li>\n
  2. Hur vi gjorde \"den h\u00e5rdvarum\u00e4ssiga delen<\/a><\/noindex>\" av projektet \u2014 f\u00f6r dem med intresse f\u00f6r geek-pornografi, med detaljer och kodanalys.<\/li>\n
  3. Megainl\u00e4gg om projektet<\/a><\/noindex> med fullst\u00e4ndig beskrivning.<\/li>\n
  4. Projektets webbplats<\/noindex>, d\u00e4r man kunde f\u00f6lja ballongens r\u00f6relse och telemetrin i realtid.<\/li>\n
  5. Rapport<\/a><\/noindex> fr\u00e5n platsen d\u00e4r ballongen startade.<\/li>\n<\/ol>\n

    Och erfarenhet, son av sv\u00e5ra misstag<\/h2>\n

    \nSom ni minns planerade vi att s\u00e4nda data fr\u00e5n servern via GSM-modem. Det var den huvudsakliga informations\u00f6verf\u00f6ringskanalen. Vi trodde att vi hade f\u00f6rutsett alla ov\u00e4ntade situationer med mobiln\u00e4ts t\u00e4ckning, genom att s\u00e4tta in tv\u00e5 SIM-kort fr\u00e5n operat\u00f6rer med den b\u00e4sta t\u00e4ckningen i Dmitrov-omr\u00e5det. Dessutom hade modemet en bra omnidirektionell antenn. Men som man s\u00e4ger, m\u00e4nniskan planerar, men leverant\u00f6rerna disponerar. N\u00e4r ballongen steg \u00f6ver 500 meter (h\u00f6jden p\u00e5 Ostaninskaja TV-tornet) f\u00f6rsvann mobiltelefonf\u00f6rbindelsen helt. <\/p>\n

    \"Server
    \n
    \nN\u00e4r man t\u00e4nker tillbaka verkar detta uppenbart, men det \u00e4r ju l\u00e4tt att vara efterklok. Sj\u00e4lvklart \u00e4r mobilantennor utformade f\u00f6r att ge t\u00e4ckning p\u00e5 marken och inte i luften. Deras riktverkan \"s\u00e4nder\" l\u00e4ngs terr\u00e4ngen och \"lyser\" inte upp i molnen. S\u00e5 mobilkommunikation p\u00e5 en h\u00f6jd av en halv kilometer eller mer \u00e4r endast en slumpm\u00e4ssig reflektion av en viss antenns lob. S\u00e5 h\u00e4lften av kommunikationsv\u00e4gen med ballongen via mobiln\u00e4tet fanns inte. Och vid nedstigningen, n\u00e4r vi kom ner under 500 meter, fungerade mobilf\u00f6rbindelsen igen.<\/p>\n

    Hur fick vi telemetri fr\u00e5n sf\u00e4ren? Tack vare den duplicerade datakanalen. Vi installerade ett paket p\u00e5 sf\u00e4ren LoRa-radiof\u00f6rbindelse<\/a><\/noindex>, som arbetar p\u00e5 frekvensen 433 MHz. <\/p>\n

    \"Server
    \n
    \nBandbredden \u00e4r inte stor, men f\u00f6r v\u00e5ra behov r\u00e4ckte den helt och h\u00e5llet. N\u00e4r det g\u00e4ller att best\u00e4mma sf\u00e4rens position med GPS fanns det inga problem, trackern fungerade utan avbrott.<\/p>\n

    \"Server
    \n
    \nOch under flygningen visade det sig att USB-kabeln som kopplade telemetrimodulen till Raspberry Pi 3 var defekt. Den fungerade p\u00e5 marken men sviktade i luften. Kanske den blev r\u00e4dd f\u00f6r h\u00f6jden. Vi uppt\u00e4ckte kabelns problem f\u00f6rst efter landning. Lyckligtvis lyckades vi st\u00e4lla in datatransmissionen direkt fr\u00e5n telemetrimodulen via LoRa.<\/p>\n

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

    Och det positiva<\/h2>\n

    \nLyckan log mot hubbarnyheterna @severov_info<\/a><\/noindex> (f\u00f6rsta plats), @MAXXL<\/a><\/noindex> (andra plats) och @evzor<\/a><\/noindex> (tredje plats)! Den mest lyckosamma i november kommer att f\u00e5 en m\u00e4ngd upplevelser (vi hoppas, trevliga) fr\u00e5n deltagandet i segelregattan AFR<\/a><\/noindex>, och de som fick andra och tredje plats kommer snart att f\u00e5 fina smartphones. Och sj\u00e4lvklart, alla tre f\u00e5r en gratis uthyrning av en virtuell server fr\u00e5n RUVDS.<\/p>\n

    \"Server
    \n
    \n\"Server
    \n
    \nHur lanseringen gick kan ses i denna korta video: <\/p>\n

    \r\n \"Spela\r\n
    <\/div>\r\n <\/div><\/center>
    \n
    K\u00e4lla:     habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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