{"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\/ro\/blog\/administrirovanie\/server-v-oblakah-itogi-proekta","title":{"rendered":"Server \u00een nori: Concluziile proiectului","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Prieteni, este timpul s\u0103 tragem concluziile proiectului nostru-concurs \u201eServer \u00een nori\u201d. Dac\u0103 cineva nu \u0219tie, am creat un proiect geek: am construit un mic server pe Raspberry Pi 3, am montat un tracker GPS \u0219i senzori, am \u00eenc\u0103rcat toate acestea pe un balon cu aer \u0219i le-am l\u0103sat pe seama for\u021belor naturii. Unde va ateriza balonul, \u0219tiu doar zeii v\u00e2ntului \u0219i protectorii aerostaticii, a\u0219a c\u0103 am \u00eencurajat pe to\u021bi doritorii s\u0103 marcheze puncte pe hart\u0103 \u2014 cine va aproxima cel mai aproape de locul real de aterizare va c\u00e2\u0219tiga premii \u201edelicioase\u201d.<\/p>\n

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

A\u0219adar, serverul nostru a zburat deja \u00een nori \u0219i este timpul s\u0103 tragem concluziile concursului nostru.
\n<\/a><\/noindex>
\nLink-uri c\u0103tre publica\u021biile anterioare despre concurs<\/b><\/p>\n

    \n
  1. Postare despre regat\u0103<\/a><\/noindex> (premiul pentru locul \u00eent\u00e2i \u00een concursul nostru \u2014 participarea la regata de naviga\u021bie AFR (Another F*cking Race)<\/a><\/noindex>, care va avea loc \u00eentre 3 \u0219i 10 noiembrie \u00een Golful Saronic (Grecia) \u00eempreun\u0103 cu echipa RUVDS \u0219i Habr.<\/li>\n
  2. Cum am realizat \u201epartea hardware<\/a><\/noindex>a proiectului \u2014 pentru iubitorii de geek-porn, cu detalii \u0219i analiza codului.<\/li>\n
  3. Mega-post despre proiect<\/a><\/noindex> cu o descriere complet\u0103.<\/li>\n
  4. Site-ul proiectului<\/noindex>, pe care se putea urm\u0103ri mi\u0219carea balonului \u0219i telemetria \u00een timp real.<\/li>\n
  5. Reportaj<\/a><\/noindex> de la locul lans\u0103rii balonului.<\/li>\n<\/ol>\n

    \u0218i experien\u021ba, fiule al gre\u0219elilor dificile<\/h2>\n

    \nCum \u0219ti\u021bi, pl\u0103nuiam s\u0103 transmitem datele de la server prin modem GSM. Acesta a fost canalul principal de transmitere a informa\u021biei. Ni s-a p\u0103rut c\u0103 am prev\u0103zut orice nea\u0219teptare cu acoperirea re\u021belei celulare, introduc\u00e2nd \u00een modem dou\u0103 SIM-uri ale operatorilor cu cea mai bun\u0103 acoperire \u00een zona Dmitrov. \u00cen plus, modemul avea o anten\u0103 omnidirec\u021bional\u0103 bun\u0103. Dar, dup\u0103 cum se spune, omul propune, iar operatorii dispune. C\u00e2nd balonul s-a ridicat la peste 500 de metri (\u00een\u0103l\u021bimea Turnului Ostankino), semnalul celular a disp\u0103rut complet. <\/p>\n

    \"Server
    \n
    \nReflect\u00e2nd retrospectiv, pare evident, dar a\u0219a este trecutul. Desigur, antenele celulare sunt concepute pentru a oferi acoperire pe p\u0103m\u00e2nt, nu \u00een aer. Diagramele lor de direc\u021bie \u201ecump\u0103r\u0103\u201d pe lungimea terenului \u0219i nu \u201earat\u0103\u201d \u00een nori. A\u0219a c\u0103 acoperirea celular\u0103 la o \u00een\u0103l\u021bime de o jum\u0103tate de kilometru \u0219i mai mult este doar o reflexie \u00eent\u00e2mpl\u0103toare a unui petal al unei antene oarecare. A\u0219a c\u0103 pe jum\u0103tate din traseul de leg\u0103tur\u0103 cu balonul, pe canalul celular, nu a existat semnal. Iar \u00een timpul cobor\u00e2rii, c\u00e2nd am ajuns sub 500 de metri, semnalul celular a redevenit func\u021bional.<\/p>\n

    Cum am ob\u021binut telemetria de la balon? Mul\u021bumim canalului de date redundant. Am instalat pe balon un set de comunica\u021bie LoRa<\/a><\/noindex>, care func\u021bioneaz\u0103 la o frecven\u021b\u0103 de 433 MHz. <\/p>\n

    \"Server
    \n
    \nL\u0103\u021bimea de band\u0103 nu este mare, dar pentru sarcinile noastre a fost suficient\u0103. \u00cen ceea ce prive\u0219te determinarea loca\u021biei balonului prin GPS, nu am \u00eent\u00e2mpinat probleme, trackerul a func\u021bionat perfect.<\/p>\n

    \"Server
    \n
    \nDe asemenea, \u00een zbor am descoperit c\u0103 cablul USB care conecta modulul de telemetrie la Raspberry Pi 3 s-a dovedit a fi defect. A func\u021bionat pe p\u0103m\u00e2nt, dar a cedat \u00een aer. Probabil s-a speriat de \u00een\u0103l\u021bime. Am descoperit problema cablului dup\u0103 aterizare. Din fericire, am reu\u0219it s\u0103 stabiliz\u0103m transmiterea datelor direct de la modulul de telemetrie prin LoRa.<\/p>\n

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

    \u0218i despre ve\u0219ti bune<\/h2>\n

    \nNorocul le-a sour\u00e2s utilizatorilor de pe Habr @severov_info<\/a><\/noindex> (locul \u00eent\u00e2i), @MAXXL<\/a><\/noindex> (locul doi) \u0219i @evzor<\/a><\/noindex> (locul trei)! Cel mai norocos dintre voi va avea parte de multe impresii (sper\u0103m, pl\u0103cute) de la participarea la regata de vela AFR<\/a><\/noindex>, iar c\u00e2\u0219tig\u0103torii locurilor doi \u0219i trei vor primi \u00een cur\u00e2nd smartphone-uri excelente. Iar, bine\u00een\u021beles, to\u021bi trei vor primi cadou o \u00eenchiriere gratuit\u0103 a unui server virtual de la RUVDS.<\/p>\n

    \"Server
    \n
    \n\"Server
    \n
    \nPute\u021bi vedea cum a decurs lansarea \u00een acest videoclip scurt: <\/p>\n

    \r\n \"Reda\u021bi\r\n
    <\/div>\r\n <\/div><\/center>
    \n
    Sursa:     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\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 \u00een nori: Concluziile proiectului | ProHoster","description":"Prieteni, e vremea s\u0103 tragem concluziile proiectului nostru de concurs \u201eServer \u00een 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