Keeb Kwm & Daim Ntawv Thov
NFC: Ib qho luv luv-ntau zaus wireless kev sib txuas lus thev naus laus zis uas tso cai rau cov ntaub ntawv tsis sib cuag ntawm cov khoom siv hluav taws xob, sib pauv cov ntaub ntawv hauv qhov deb ntawm 10cm. NFC kev sib txuas lus muaj xws li ob qho kev ywj pheej: NFC nyeem ntawv thiab NFC tag. NFC nyeem ntawv yog qhov tseem ceeb ntawm lub kaw lus uas "nyeem" (lossis txheej txheem) cov ntaub ntawv ua ntej ua rau cov lus teb tshwj xeeb. Nws muab lub zog thiab xa NFC cov lus txib mus rau qhov tsis muaj zog ntawm qhov system (piv txwv li NFC tag). Feem ntau, ua ke nrog microcontroller, NFC nyeem ntawv muab lub zog rau thiab sib pauv cov ntaub ntawv nrog ib lossis ntau daim ntawv NFC. NFC tus nyeem ntawv txhawb nqa ntau yam kev cai RF thiab cov yam ntxwv thiab tuaj yeem siv tau hauv peb hom sib txawv: nyeem / sau, phooj ywg-rau-peer (P2P) thiab daim npav emulation. Kev ua haujlwm zaus ntawm NFC yog 13.56 MHz, uas yog cov khoom siv siab, thiab cov txheej txheem raws tu qauv yog ISO / IEC 14443A / B thiab ISO / IEC15693.
NFC daim ntawv lo muaj ntau yam kev siv, xws li kev sib koom ua ke thiab kev debugging, cov ntawv tshaj tawm, kev tiv thaiv cuav, thiab lwm yam.
1.Pairing & Debugging
Los ntawm kev sau cov ntaub ntawv xws li lub npe thiab lo lus zais ntawm WiFi rau NFC daim ntawv lo ntawm NFC nyeem ntawv, affixing daim ntawv lo rau qhov chaw tsim nyog, kev sib txuas tuaj yeem tsim los ntawm kev tso ob lub NFC-enabled devices ze rau ib leeg. Tsis tas li ntawd, NFC tuaj yeem ua rau lwm yam kev cai xws li Bluetooth, ZigBee. Pairing yeej tshwm sim hauv qhov sib cais thib ob thiab NFC tsuas yog ua haujlwm thaum koj xav tau, yog li yuav tsis muaj kev sib txuas ntawm cov cuab yeej sib tsoo thiab yuav tsis muaj cov cuab yeej tsis sib haum xeeb xws li Bluetooth. Kev tshaj tawm cov cuab yeej tshiab lossis nthuav koj lub network hauv tsev kuj yooj yim dua, thiab tsis tas yuav tshawb nrhiav kev sib txuas lossis sau tus password.
Kev soj ntsuam ntawm kev xaiv khoom
Chip: Nws raug nquahu kom siv NXP NTAG 21x series, NTAG 213, NTAG 215 thiab NTAG 216. Cov chips no ua raws li NFC Hom 2 tus qauv thiab tseem ua tau raws li ISO14443A tus qauv.
Kav hlau txais xov:NFC ua haujlwm ntawm 13.56MHz, siv cov txheej txheem txhuas etching coil kav hlau txais xov AL + PET + AL.
Kua nplaum: Yog tias cov khoom yuav tsum tau ua raws li tus neeg siv thiab qhov chaw siv tau zoo, tus nqi qis kub yaj kua nplaum los yog dej kua nplaum tuaj yeem siv tau. Yog tias qhov kev siv ib puag ncig hnyav thiab cov khoom yuav tsum tau ua yog ntxhib, cov kua nplaum tuaj yeem siv los ua kom muaj zog.
Khoom siv saum npoo: Coated ntawv tuaj yeem siv tau. Yog tias yuav tsum tau ua kom tsis muaj dej, cov ntaub ntawv PET lossis PP tuaj yeem siv. Cov ntawv luam tawm thiab cov qauv luam tawm tuaj yeem muab tau.
2. Kev tshaj tawm & Cov ntawv tshaj tawm
Cov ntawv tshaj tawm ntse yog ib qho kev siv ntawm NFC thev naus laus zis. Nws ntxiv NFC cov cim npe rau thawj daim ntawv tshaj tawm lossis cov ntawv tshaj tawm, yog li thaum tib neeg pom qhov kev tshaj tawm, lawv tuaj yeem siv lawv tus kheej lub xov tooj smartphones los luam theej duab cov cim kos kom tau txais cov ntaub ntawv tshaj tawm ntsig txog. Hauv daim ntawv tshaj tawm, NFC thev naus laus zis tuaj yeem ntxiv kev cuam tshuam ntau dua. Piv txwv li, daim ntawv tshaj tawm uas muaj NFC nti tuaj yeem txuas nrog cov ntsiab lus xws li suab paj nruag, yeeb yaj kiab, thiab txawm tias muaj kev sib tham sib ua si, yog li nyiam ntau tus neeg nyob rau pem hauv ntej ntawm daim ntawv tshaj tawm thiab ua rau muaj kev xav thiab kev txhawb nqa. Nrog cov koob nrov ntawm cov xov tooj smartphones nrog NFC lub luag haujlwm, NFC cov ntawv tshaj tawm ntse kuj tau siv hauv ntau thaj chaw.
Cov ntaub ntawv hauv NDEF hom xws li cov ntawv tshaj tawm ntse, ntawv nyeem, URLs, hu xov tooj, pib apps, daim ntawv qhia kev tswj hwm, thiab lwm yam tuaj yeem sau rau hauv NFC daim ntawv lo rau NFC-enabled devices nyeem thiab nkag. Thiab cov ntaub ntawv sau tuaj yeem raug encrypted thiab kaw kom tiv thaiv kev hloov pauv tsis zoo los ntawm lwm cov ntawv thov.
Kev soj ntsuam ntawm kev xaiv khoom
Chip: Nws raug nquahu kom siv NXP NTAG21x series chips. Cov yam ntxwv tshwj xeeb muab los ntawm NTAG21x yog tsim los txhim kho kev sib koom ua ke thiab cov neeg siv yooj yim:
1) Fast Read functionality tso cai rau luam theej duab ntawm NDEF cov lus ua tiav siv tsuas yog ib qho FAST_READ cov lus txib, yog li txo cov sij hawm nyeem hauv qhov chaw tsim khoom loj;
2) Txhim kho RF kev ua tau zoo, muab kev hloov pauv ntau dua hauv cov duab, qhov loj me thiab xaiv cov khoom siv;
3) 75 μm IC thickness kev xaiv txhawb kev tsim cov cim npe ultra-nyias rau kev sib xyaw yooj yim rau hauv cov ntawv xov xwm lossis cov ntawv tshaj tawm, thiab lwm yam;
4) Nrog 144, 504 lossis 888 bytes ntawm thaj chaw muaj neeg siv, cov neeg siv tuaj yeem xaiv raws li lawv xav tau.
Kav hlau txais xov:NFC ua haujlwm ntawm 13.56MHz, siv cov txheej txheem txhuas etching coil kav hlau txais xov AL + PET + AL.
Kua nplaum:Vim tias nws yog siv rau ntawm cov ntawv tshaj tawm thiab cov khoom yuav tsum tau muab tshuaj txhuam yog tus du, tus nqi qis kub yaj kua nplaum los yog dej kua nplaum tuaj yeem siv tau.
Khoom siv saum npoo: daim ntawv kos duab tuaj yeem siv tau. Yog tias yuav tsum tau ua kom tsis muaj dej, cov ntaub ntawv PET lossis PP tuaj yeem siv. Cov ntawv luam tawm thiab cov qauv luam tawm tuaj yeem muab tau.
3. Kev tiv thaiv cuav
NFC anti-counterfeiting tag yog ib qho hluav taws xob los tiv thaiv cov khoom cuav, uas yog siv los txheeb xyuas qhov tseeb ntawm cov khoom, tiv thaiv lub tuam txhab cov khoom lag luam, tiv thaiv cov khoom cuav los tiv thaiv cov khoom cuav los ntawm kev lag luam, thiab tiv thaiv cov neeg siv khoom txoj cai thiab kev txaus siab. ntawm cov neeg siv khoom.
Cov ntawv pov thawj hluav taws xob tiv thaiv kev ua lag luam yog muab tso rau hauv cov khoom ntim khoom, thiab cov neeg siv khoom tuaj yeem txheeb xyuas cov ntawv pov thawj hluav taws xob los ntawm APP ntawm lub xov tooj ntawm tes NFC, tshawb xyuas cov ntaub ntawv tseeb, thiab nyeem cov ntaub ntawv ntsig txog cov khoom. Piv txwv li: cov ntaub ntawv tsim khoom, hnub tsim khoom, qhov chaw ntawm lub hauv paus chiv keeb, specifications, thiab lwm yam., decrypt cov ntaub ntawv tag thiab txiav txim siab qhov tseeb ntawm cov khoom. Ib qho ntawm qhov zoo ntawm NFC thev naus laus zis yog nws qhov yooj yim ntawm kev sib koom ua ke: cov ntawv NFC me tshaj plaws yog li 10 millimeters dav thiab tuaj yeem muab tso rau hauv cov khoom ntim khoom, khaub ncaws lossis lub raj mis cawv.
Kev soj ntsuam ntawm kev xaiv khoom
1. Chip: Nws raug nquahu kom siv FM11NT021TT, uas yog lub cim cim tsim los ntawm Fudan Microelectronics uas ua raws li ISO / IEC14443-A raws tu qauv thiab NFC Forum Type2 Tag tus qauv thiab muaj qhov qhib kev tshawb nrhiav. Nws tuaj yeem siv dav hauv kev lag luam xws li kev ntim khoom ntse, kev tiv thaiv cov khoom cuav, thiab kev tiv thaiv tub sab nyiag khoom.
Hais txog kev ruaj ntseg ntawm NFC tag nti nws tus kheej:
1) Txhua nti muaj kev ywj pheej 7-byte UID, thiab UID tsis tuaj yeem rov sau dua.
2) CC cheeb tsam muaj OTP muaj nuj nqi thiab tsim kua muag tiv thaiv kom txhob muaj siab phem xauv.
3) Qhov chaw cia khoom muaj qhov kev nyeem ntawv nkaus xwb.
4) Nws muaj ib qho kev xaiv tau qhib cov password tiv thaiv kev ua haujlwm, thiab qhov siab tshaj plaws ntawm kev sim tus password yog configurable.
Nyob rau hauv cov lus teb rau cov khoom cuav uas siv cov cim npe thiab sau cov fwj tiag nrog cov cawv cawv cuav, peb tuaj yeem tsim NFC cov ntawv tsis muaj zog nrog cov qauv tsim, tsuav yog qhib cov khoom, daim ntawv lo yuav tawg thiab rov siv tsis tau! Yog tias daim ntawv raug tshem tawm, daim ntawv yuav tawg thiab siv tsis tau txawm tias nws raug tshem tawm.
2. Kav hlau txais xov: NFC ua haujlwm ntawm 13.56MHz thiab siv lub kav hlau txais xov coil. Txhawm rau ua kom nws tsis yooj yim, daim ntawv hauv paus yog siv los ua tus nqa khoom ntawm tus kav hlau txais xov thiab nti AL + Ntawv + AL.
3. Kua nplaum: Siv cov kua nplaum hnyav rau cov ntawv hauv qab, thiab lub teeb-tso kua nplaum rau cov khoom pem hauv ntej. Nyob rau hauv txoj kev no, thaum lub cim yog tev tawm, cov khoom pem hauv ntej thiab cov ntawv thaub qab yuav sib cais thiab ua rau lub kav hlau txais xov puas, ua rau NFC ua haujlwm tsis zoo.
