{"id":83227,"date":"2020-05-29T19:42:33","date_gmt":"2020-05-29T17:42:33","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/nfc-razbor-tehnologii-near-field-communication"},"modified":"2020-05-29T19:42:33","modified_gmt":"2020-05-29T17:42:33","slug":"nfc-razbor-tehnologii-near-field-communication","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/nfc-razbor-tehnologii-near-field-communication","title":{"rendered":"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Me k\u00f5ik oleme harjunud nutitelefonides NFC-ga. Ja tundub, et see on t\u00e4iesti selge.<\/p>\n<p>Paljud ei osta telefone, kus ei ole NFC-d, arvates, et see on ainult ostmise jaoks. Kuid siin on palju k\u00fcsimusi.<\/p>\n<p>Kuid kas te teadsite, milleks veel see tehnoloogia suudab? Mida teha, kui teie telefonis ei ole NFC-d? Kuidas kasutada kiipi iPhone'is mitte ainult Apple Pay jaoks? Miks see ei t\u00f6\u00f6ta, eriti \u041c\u0438\u0440 kaardiga?<\/p>\n<p>Ja veel, selle kaudu saab laadida seadmeid...<\/p>\n<p><center><div class=\"youtube-placeholder\" data-id=\"fTpJsxKR5s0\" onclick=\"loadVideo(this)\">\r\n        <img decoding=\"async\" src=\"https:\/\/img.youtube.com\/vi\/fTpJsxKR5s0\/hqdefault.jpg\" alt=\"M\u00e4ngi videot\" loading=\"lazy\" width=\"480\" height=\"360\" style=\"width:100%;height:auto;\">\r\n        <div class=\"play-button\"><\/div>\r\n    <\/div><\/center><\/p>\n<p>T\u00e4na r\u00e4\u00e4gime sellest, kuidas see t\u00f6\u00f6tab ja uurime k\u00f5iki detaile. Ja peamine \u2014 miks see on teie nutitelefoni k\u00f5ige alahinnatum tehnoloogia!<\/p>\n<h4>Kuidas NFC t\u00f6\u00f6tab?<\/h4>\n<p>\nTe t\u00f5en\u00e4oliselt teate, et NFC t\u00e4histab Near Field Communication ehk l\u00e4heduskommunikatsioon.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nKuid see ei ole tavaline andmeedastus raadiolaine kaudu. Erinevalt Wi-Fi-st ja Bluetooth'ist on NFC konstruktsioon keerukam. Selle aluseks on elektromagnetiline induktsioon. See on t\u00f5eliselt lahe asi kooliprogrammist, meenutan.<\/p>\n<p><img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/e197b9f305530e8b5cbff84424f485c7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nIdee seisneb selles, et v\u00f5tate \u00fche juhtme, kus ei ole elektrit. Ja asetate selle k\u00f5rvale teise juhtme, kus on elekter. Ja teate, mis juhtub? Esimeses juhtmes, kus elektrit ei olnud, hakkab voolama vool!<\/p>\n<p>Lahe, eks?<\/p>\n<p>Kui me esmakordselt sellest kuulsime, m\u00f5tlesime, et see on v\u00f5imatu! T\u00f5siselt? Te kindlasti naljatate! L\u00e4hme m\u00e4ngime Counter Strike'i, poisid.<\/p>\n<p>Nii et, kui toote oma nutitelefoni m\u00f5nele NFC sildile, mis ei ole toitega, on selle v\u00e4ike elektromagnetiline v\u00e4li piisav, et seal sees olevad elektronid hakkaksid liikuma ja mikrokiibid selle sees aktiveeruksid.<\/p>\n<p><img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/3ce7b8ecd9f657725f0a16c069af5977.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nAhjaa. Igas sildis on v\u00e4ike mikrokiip. N\u00e4iteks pangakaartidel k\u00e4ivitab mikrokiip isegi lihtsa Java versiooni. Kuidas k\u00f5lab?<\/p>\n<p>V\u00f5ib-olla olete kuulnud ka l\u00fchendit RFID. Seda arendati umbes 30 aastat varem. See t\u00e4histab raadiotiheduse identifitseerimist. Ja sisuliselt sobib see ainult identifitseerimiseks. Paljudes kontorites on siiani RFID p\u00f5hjatused.<\/p>\n<p><img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/108144cabfd2955e23a69c93dc82dfe1.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nNii et NFC on arenenud RFID standardi haru ja loeb osa sellistest siltidest. Kuid peamine erinevus on see, et NFC suudab edastada ka andmeid, sealhulgas kr\u00fcpteeritud.<\/p>\n<p>NFC t\u00f6\u00f6tab sagedusel 13,56 MHz, mis v\u00f5imaldab saavutada \u00fcsna head kiirus vahemikus 106 kuni 424 kbit\/s. Nii et mp3-faili allalaadimine kestab paar minutit, aga ainult kuni 10 cm kaugusel.<\/p>\n<p>F\u00fc\u00fcsiliselt on NFC v\u00e4ike spiraal. N\u00e4iteks on see Pixel 4 tagaosas kinnitatud ja n\u00e4eb v\u00e4lja nagu see.<\/p>\n<p><img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/3b08bb56092e1c8a79d1ab2600154d01.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nJa siin on Xiaomi Mi 10 Pro:<\/p>\n<p><img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/36d41baa2241d8f8789156992cda2779.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Ja n\u00fc\u00fcd on aeg r\u00e4\u00e4kida, mida NFC teha oskab?<\/p>\n<p>Selle tehnoloogia ja sarnaste, nagu RFID, t\u00f6\u00f6 on kirjeldatud standardis <strong>ISO 14443<\/strong>. Seal on palju muud kokku pandud: n\u00e4iteks Itaalia protokoll Mifare ja VME - see on pangakaartides.<\/p>\n<p>NFC on omamoodi USB Type-C juhtmevaba tehnoloogiate maailmas, kui te m\u00f5istate, millest ma r\u00e4\u00e4gin.<\/p>\n<p>Aga peamine on see. NFC v\u00f5ib t\u00f6\u00f6tada kolmes re\u017eiimis:<\/p>\n<ol>\n<li><strong>Aktiivne.<\/strong> Kui seade loeb v\u00f5i salvestab andmeid sildilt v\u00f5i kaardilt. Muide, jaa, NFC siltidele saab ka andmeid salvestada.<\/li>\n<li><strong>\u00dclekanne v\u00f5rdsete seadmete vahel.<\/strong> See on siis, kui \u00fchendate nutitelefoni juhtmevabad k\u00f5rvaklapid v\u00f5i kasutate Android Beami - kas m\u00e4letate sellist asja. Seal toimus \u00fchendamine NFC kaudu, aga failide edastamine k\u00e4is juba Bluetoothi kaudu.<\/li>\n<li><strong>Passiivne.<\/strong>\u00a0Kui meie seade teeskleb olevat midagi passiivset: maksekaarti v\u00f5i s\u00f5idukaarti.<\/li>\n<\/ol>\n<p>\nMiks NFC, kui on Bluetooth ja Wi-Fi, sest neil on rohkem kiirus ja piirkond?<\/p>\n<p><img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/eab0f092f28167ba3321ab71bf081535.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nNFC eelised on j\u00e4rgmised:<\/p>\n<ol>\n<li>Kohene \u00fchendamine - \u00fcks k\u00fcmnendik sekundit.<\/li>\n<li>Madal energiatarve - 15 mA. Bluetoothil kuni 40 mA.<\/li>\n<li>Sildid ei vaja oma toites\u00fcsteemi.<\/li>\n<li>Ja mitte nii ilmselge - v\u00e4ike toimimisraadius, mis on vajalik ohutuse ja maksete jaoks.<\/li>\n<\/ol>\n<p>\nOn t\u00f5si, et on veel Bluetooth Low Energy, aga see on eraldi lugu.<\/p>\n<h4>Miks? Mida see meile annab?<\/h4>\n<p>\n<img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/ec2ccd966a999c7bc57e4bd6e03849e7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nPeale juba ilmselgete stsenaariumide: p\u00e4\u00e4smed, maksed ja s\u00f5idukaardid - on rakendusi, mis oskavad raha kaardile 'Troika' ja teistele transpordikaartidele laadida.<\/p>\n<p>On rakendus - Pangakaardilugeja. See v\u00f5ib n\u00e4iteks n\u00e4idata viimaseid tehinguid kaardiga. Ei ole kindel, et see on v\u00e4ga eetiline, aga rakendus on Play Marketis.<\/p>\n<p>Muide, paljusid huvitab, miks Google ja Apple Pay ei t\u00f6\u00f6ta kaartidega Mir? Probleem ei ole tehnilistes erip\u00e4rades. Lihtsalt makses\u00fcsteem ei ole teenustega kokku leppinud. Tasuda saab oma rakenduses Androidi all - Mir Pay. Aga see on t\u00f5rkuv ja iPhone'i all pole seda \u00fcldse!<\/p>\n<p>Muide, n\u00e4pun\u00e4ide. Kui teie Androidil ei ole NFC-d, aga maksta v\u00e4ga tahate, mida teha? Samuti v\u00f5ite kaardi panna \u00fcmbrise alla. V\u00f5tke \u00fchendust. Aga paksud \u00fcmbrised v\u00f5ivad isegi integreeritud NFC laineid mitte l\u00e4bi lasta - seega kontrollige.<\/p>\n<p>Oleme juba r\u00e4\u00e4kinud seadmetest, kuid on olemas ka teine oluline osa \u2014 NFC-sildid. Need on kahte t\u00fc\u00fcpi.<\/p>\n<ol>\n<li>Need, kuhu saab teavet salvestada. Need n\u00e4evad v\u00e4lja nagu v\u00e4ikesed kleebised. Tavaliselt on saadaval m\u00e4lu maht umbes 700 baiti. Taolisi tootis ettev\u00f5te Sony.<\/li>\n<\/ol>\n<p>\n<img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/7c7640d52b71c1c29d2357000d5c5607.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nSiia saab salvestada palju erinevat, n\u00e4iteks:<\/p>\n<ul>\n<li>K\u00fclastajate Wi-Fi ligip\u00e4\u00e4s<\/li>\n<li>Salvestada kontaktandmed ja kasutada neid visiitkaardina<\/li>\n<li>Seada nutitelefon \u00f6\u00f6sel tuksuma minnes magama \u00f6\u00f6kapile<\/li>\n<li>Samuti saab sinna salvestada teatud andmeid, n\u00e4iteks parooli v\u00f5i Bitcoini tokenit. Kuid parem on seda teha kr\u00fcpteeritud kujul.<\/li>\n<\/ul>\n<p>\nSellise sildi loeb iga NFC-toega telefon.<\/p>\n<p>Mida teha, kui sul pole NFC-silte? Need on tellitavad ja maksavad ainult m\u00f5nisada.<\/p>\n<p>Aga v\u00f5id v\u00f5tta tavalise pangakaardi v\u00f5i transpordikaardi, n\u00e4iteks \"Troika\". Need on kirjutamiseks suletud sildid. T\u00fc\u00fcpiline n\u00e4ide \u2014 sinu pangakaart. Neile ei saa midagi salvestada.<\/p>\n<p>Aga su nutitelefoni saab programmeerida igasuguste tegevuste tegemiseks, kui seda silda tema juurde l\u00e4hed.<\/p>\n<p>Kui sul on Android, saad paigaldada n\u00e4iteks rakenduse <noindex><a rel=\"nofollow\" href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.arlosoft.macrodroid&amp;amp;hl=ru\">MacroDroid<\/a><\/noindex> v\u00f5i <noindex><a rel=\"nofollow\" href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.widgapp.NFC_ReTAG_FREE&amp;amp;hl=ru\">NFC ReTag<\/a><\/noindex>. Nendes saad m\u00e4\u00e4rata umbes samasuguseid tegevusi NFC-siltide jaoks. L\u00fclitada Wi-Fi sisse v\u00f5i v\u00e4lja ning k\u00f5net, k\u00e4ivitada rakendusi, aktiveerida \u00f6\u00f6re\u017eiim. N\u00e4iteks saad teha nii, et kui paned telefoni \"Troika\" kaardi peale, avatakse sul automaatselt <noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/channel\/UCY03gpyR__MuJtBpoSyIGnw\">kanal Droider<\/a><\/noindex>. Soovitan!<\/p>\n<p>Muide, nii n\u00e4eb \"Troika\" sisu v\u00e4lja.<\/p>\n<p><img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/343c53cb8161ed385838e250fb66821a.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nJa saad veel lugeda <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/447104\/\">Habr.com<\/a><\/noindex> k\u00fctke, kes implanteeris endale NFC-sildi k\u00e4e.<\/p>\n<h4>Mida muudele eesm\u00e4rkidele NFC kasutada saab?<\/h4>\n<p>\n\u00dcks perspektiivikaid asju on elektroonilised piletid. Kinno v\u00f5i kontserditele. Praegu tehakse seda QR-koodi kaudu ja see pole nii \u00e4ge, minu arvates. Kuigi miljonid hiinlased ei n\u00f5ustu minuga.<\/p>\n<h4>Apple'i kohta<\/h4>\n<p>\n<img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/84c230c354bd3826cddfdca37e04bad4.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nMida teha, kui sul on iPhone? K\u00f5ik arvavad, et juurdep\u00e4\u00e4s NFC-le on iPhone'is suletud, kuid see pole t\u00f5si. Alates iOS 11-st, st 2017. aastast avas Apple juurdep\u00e4\u00e4su arendajatele. Ja juba on olemas palju sama t\u00fc\u00fcpi rakendusi nagu Androidis. N\u00e4iteks NFC Tools.<\/p>\n<p>Kuid seal j\u00e4\u00e4vad piirangud: transpordi- ja pangakaardid n\u00e4iteks ei skaneerita. Vajalikud on spetsiaalsed sildid, millest me juba r\u00e4\u00e4kisime.<\/p>\n<p>Mida teha? iOS 13-s on ilmunud K\u00e4skude funktsioon (Siri). See funktsioon p\u00e4\u00e4seb ligi k\u00f5ikidele NFC-siltidele. Niisiis, saate seadistada muusika k\u00e4ivitamise kaardilt \u201eT\u00f5uk\u201d v\u00f5i l\u00fclitada sisse nutilambi. V\u00f5i teha veel palju muud. K\u00e4skude funktsioon on t\u00f5eliselt kaitstud. Ma ei saa aru, miks Androidis sellist asja veel ei ole.<\/p>\n<h4>Laadimine<\/h4>\n<p>\n<img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/7b40ed09f8f845d39e5ad3f724dffd4d.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nKui olete selleks ajaks otsustanud, et teate juba k\u00f5ike NFC-st ja olete neist igavatest rakendustest v\u00e4sinud. Siin on midagi t\u00f5eliselt lahedat.<\/p>\n<p>On olemas selline organisatsioon nagu NFC Forum, mis sertifitseerib NFC-d. Igal tehnoloogial on selline organisatsioon, ja hea, kui see on vaid \u00fcks.<\/p>\n<p>Ja m\u00f5ned p\u00e4evad tagasi avaldasid nad j\u00e4rjekordse standardi uuenduse. Ja tead, mis? N\u00fc\u00fcd toetab NFC juhtmevaba laadimist. Jah, tegelikult on see neljas t\u00f6\u00f6re\u017eiim.<\/p>\n<p>Kuidas, k\u00fcsid sa? Elektromagnetiline induktsioon, kas sa m\u00e4letad? Selle abil.<\/p>\n<p>Muide, Qi-laadimine t\u00f6\u00f6tab sama p\u00f5him\u00f5tte j\u00e4rgi. Ainult et seal on m\u00e4his suurem.<\/p>\n<p>Aga on \u00fcks probleem. NFC m\u00e4his on v\u00e4ike, mis t\u00e4hendab, et laadimisv\u00f5imsus on madal \u2014 vaid 1 vatt.<\/p>\n<p>Kas on v\u00f5imalik laadida nutitelefoni sellise kiirusel? Pole m\u00f5tet isegi proovida. T\u00f5epoolest, selle funktsiooni jaoks ei olnud seda isegi v\u00e4lja m\u00f5eldud.<\/p>\n<p><img decoding=\"async\" alt=\"NFC: Near Field Communication tehnoloogia anal\u00fc\u00fcs\" src=\"\/wp-content\/uploads\/2020\/05\/35e0b43d0636f0d6f68858311d534de2.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nPeamine eesm\u00e4rk on t\u00e4pselt vastupidine \u2014 laadida nutitelefonist teisi seadmeid. See sarnaneb tagasiulatuvale laadimisele Galaxy ja teiste nutitelefonide puhul. N\u00e4iteks saab toita juhtmevabu Peak\u00f5rvaklappe, mitte nende korpust. Tegelikult on tegemist v\u00e4ga odava juhtmevaba laadimisega, mis on iga nutitelefoni sees ja mida on lihtne kasutada mis tahes nutiseadmes.<\/p>\n<p>Muide, 1 vatt ei ole see, et see oleks liiga v\u00e4ike. V\u00f5rdluseks, k\u00f5ikide iPhone'ide puhul v\u00e4lja arvatud 11 Pro kaasas 5-vatine laadija. Ja t\u00e4nap\u00e4eva lipulaevade tagasiviiv laadimise v\u00f5imsus k\u00f5igub 5 v\u00f5i 7 watti.<\/p>\n<p>Kuid on \u00fcks aga \u2014 praegustes mudelites see funktsioon ei t\u00f6\u00f6ta. Nutitelefonid, millel see funktsioon on, hakkavad ilmselt ilmuma aasta v\u00f5i pooleteise p\u00e4rast. Oodake selle toote reklaami Samsungilt.<\/p>\n<h4>Tasu neile, kes lugesid l\u00f5puni<\/h4>\n<p>\nTeame, et teile meeldivad meie p\u00f5hjalikud \u00fclevaated, kuid oleme kindlad, et selliste videote idee v\u00f5i valmistatud stsenaarium on teil juba olemas. Nii et kui teil on m\u00f5te, teate teema ja olete valmis meiega valmistama materjali \u2014 kirjutage meie uuele e-posti aadressile <strong>idea@droider.ru<\/strong>. Me kindlasti teeme \u00e4geda video!<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/droider\/blog\/504196\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u0435 \u043c\u044b \u043f\u0440\u0438\u0432\u044b\u043a\u043b\u0438 \u043a \u0442\u0430\u043a\u043e\u0439 \u0434\u0430\u043d\u043d\u043e\u0441\u0442\u0438 \u0432 \u0441\u043c\u0430\u0440\u0442\u0444\u043e\u043d\u0435 \u043a\u0430\u043a NFC. \u0418 \u0432\u0440\u043e\u0434\u0435 \u0431\u044b \u0432\u0441\u0451 \u0441 \u044d\u0442\u0438\u043c \u044f\u0441\u043d\u043e. \u041c\u043d\u043e\u0433\u0438\u0435 \u043d\u0435 \u043f\u043e\u043a\u0443\u043f\u0430\u044e\u0442 \u0441\u043c\u0430\u0440\u0442\u0444\u043e\u043d\u044b, \u0433\u0434\u0435 \u043d\u0435\u0442 NFC, \u0434\u0443\u043c\u0430\u044f \u0447\u0442\u043e \u044d\u0442\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u0440\u043e \u043f\u043e\u043a\u0443\u043f\u043a\u0438. \u041d\u043e \u0435\u0441\u0442\u044c \u043a\u0443\u0447\u0430 \u0432\u043e\u043f\u0440\u043e\u0441\u043e\u0432. \u041d\u043e \u0437\u043d\u0430\u043b\u0438 \u043b\u0438 \u0432\u044b \u0447\u0442\u043e \u0435\u0449\u0435 \u0443\u043c\u0435\u0435\u0442 \u044d\u0442\u0430 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f?\u00a0\u0427\u0442\u043e \u0434\u0435\u043b\u0430\u0442\u044c \u0435\u0441\u043b\u0438 \u0432 \u0432\u0430\u0448\u0435\u043c \u0441\u043c\u0430\u0440\u0442\u0444\u043e\u043d\u0435 \u043d\u0435\u0442 NFC?\u00a0\u041a\u0430\u043a \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0447\u0438\u043f \u0432 iPhone \u043d\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":83228,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-83227","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - 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