Miyezi iwiri yapitayo, masitolo akuluakulu -akuluakulu apakati ku Southern Europe anatipempha kuti titchule mashelufu amagetsi otulutsidwa m'masitolo 22. Gulu lawo logula zinthu linali litakhazikitsidwa kale makina atatu osiyanasiyana - imodzi yogwiritsira ntchito Bluetooth LE, ina pa Wi-Fi, ndi ina pa wailesi ya 433 MHz. Wogulitsa aliyense ankanena kuti zawo zinali zabwino kwambiri. Palibe amene anafotokoza kuti zinali zoipitsitsa pansi pa mikhalidwe yotani. Kukambirana kumeneku kunatichititsa kuti tilembe nkhaniyi.
Mabanja atatu a protocol opanda zingwe ali ndi mphamvu pa ESL pakali pano: Bluetooth Low Energy (BLE, makamaka kuyambira 5.4 specification), Wi-Fi, ndi Sub-GHz wailesi (433 MHz ku Asia, 868 MHz ku Ulaya, 915 MHz ku North America). Protocol iliyonse imathetsa vuto lenileni. Iliyonse imapanga tradeoffs zomwe mabulosha amalonda amasewera. Izi ndi zomwe tawona m'malo ogulitsa enieni.
Bluetooth LE: Open Standard, Ikukulabe pa Scale
Bluetooth ili ndi liwiro lalikulu kumbuyo kwake. Bluetooth SIG idasindikiza Mbiri Yodzipatulira ya ESL yomangidwa pa Bluetooth 5.4's PAwR (Periodic Advertising with Responses) ili ndi - njira yomwe imalola malo amodzi kuti azitha kuyitanitsa zilembo masauzande ambiri m'mipata yolinganizidwa, kenako amalandila mayankho osakhazikitsa maulumikizidwe apawokha.
Silicon Labs adayesa izi pa 1,500-node network mu labu yawo. EM Microelectronic inatumiza em|bleu SoC pa 1.8 × 1.8 mm yokha yokhala ndi 200 nA tulo tofa nato - yaying'ono mokwanira komanso yosamalidwa bwino yokwanira mkatima tag a E-inki okwana 2.66-inchi. Ndi zida zopitilira 5 biliyoni za Bluetooth zomwe zimatumizidwa chaka chilichonse, mtengo wake umapindula ndi chuma chambiri.
Kwa ogulitsa, zowoneka bwino ndi kusinthasintha kwa ogulitsa. Muyezo wotseguka umatanthauza - kwenikweni - kuti mutha kusakaniza malo ofikira kuchokera kwa ogulitsa m'modzi ndi zilembo za wina. Kumeneku ndi kunyamuka kwabwino kwa loko ya mavenda-kumene kwavutitsa ESL kwa zaka zambiri. Mafunde ogona pansi pa 2 µA ndiwofanana ndi ma chipset a BLE ESL, ndipo Bluetooth 5.4 spec imathandizira zilembo pafupifupi 32,600 pa netiweki yofikira pamapepala.
Kugwira: "papepala" ndi nkhani apa. Zogulitsa zazikulu-zotumizidwa ku BLE zikadali zazing'ono poyerekeza ndi eni ake omwe akhala akugwira ntchito kwa zaka khumi. Rigado, wogulitsa pachipata cha IoT yemwe akugwira ntchito mu ESL, amaika mtengo wapakhomo pa $1,000 mpaka $2,000 yoikidwa - ndipo sitolo yaikulu ingafunike khumi kapena kuposerapo. BLE imagwira ntchito pa 2.4 GHz, kugawana sipekitiramu ndi{{10}ma routers a Wi-Fi, mafoni a makasitomala, ma microwave, ndi chipangizo china chilichonse chopanda zingwe chomwe chili mnyumbamo. M'sitolo yotanganidwa, kusokonekera kumeneku kungathe kuchedwetsa zosintha zamitengo panthawi yanthawi yayitali.
Zokwanira bwino: malo ogulitsa mankhwala, malo ogulitsira, ndi -ogulitsa zazikuluzikulu zosachepera 2,000 m² - makamaka omwe ali ndi ma bekoni a BLE kale potsata zinthu. Kupeza kwa ogulitsa5.8-malebulo a shelufu a BLE-inchizosintha kuchokera pa piritsi popanda zida zolemetsa zipeza kuti protocol iyi ndi yosangalatsa.
Wi-Fi: Gwiritsani Ntchito Netiweki Yanu Yakale - Koma Bajeti Yamabatire
Mawu ake ndiwachidule: sitolo yanu ili kale ndi Wi-Fi{{0}Fi panjira iliyonse, choncho dumphani zipata zatsopano ndikulumikiza ma ESL anu ku netiweki yomwe ilipo kale. Kwa maunyolo akuluakulu abizinesi omwe adayika kale ndalama zambiri m'malo ogulitsira malonda ndi kuphimba kwathunthu, masamu ophatikiza amawoneka okongola.
Wi-Fi imaperekanso kuchuluka kwa data kuposa BLE kapena Sub-GHz. Ubwino umenewo umakhala wooneka pamene mukukankhira zinthu zambiri - zithunzi zamalonda, makanema otsatsira -LCD{{0}zowonetsera pamitengo ya digitoosati ma tag a inki E-wamba. A15.6-inchi LCD chophimbakutsatsa malonda pa endcap kumafunikira bandwidth yomwe E-ma tag a inki safuna.
Vuto likuwonekera m'malo awiri. Choyamba, kugwiritsa ntchito mphamvu. Wi-Fi imakoka kwambiri kuposa BLE kapena Sub-GHz nthawi iliyonse yotumizira uthenga. E-lebulo ya inki pawailesi ya Sub-GHz ikhoza kutha zaka zisanu mpaka zisanu ndi zitatu pa selo yandalama yokhala ndi zosintha kamodzi kapena katatu patsiku. Zolemba zomwezi pa Wi-Fi? Miyezi khumi ndi iwiri mpaka khumi ndi isanu ndi itatu. Pamlingo - masauzande masauzande a zilembo m'masitolo angapo - kutanthauza pulogalamu yobwereza ya batire yomwe gulu lanu la opareshoni liyenera kukuthandizani. Chachiwiri, kusokonekera kwa maukonde. Ma Wi{{14}Fi ESL amapikisana pa airtime ndi materminal a POS, zida zamakasitomala, masikani apam'manja, ndi{15}}zobweza pawekha. Pachimake cha Loweruka masana, mpikisano umenewo siwongoyerekeza.
Zokwanira bwino kwambiri: ogulitsa mabizinesi okhwima,{0}}opangidwa bwino kwambiri ndi ma Wi-Fi, masitolo okhala ndi zikwangwani za digito za LCD (komwe moyo wa batri ndi wosafunika chifukwa zotchingira ndi zomangika), ndi zoyikidwamo zoyesedwa mazana m'malo mwa masauzande masauzande a malebo.
Sub-GHz (433/868/915 MHz): Palibe Kukongola, Utali wautali, Batiri Lalitali
Wayilesi ya{{0}GHz yapang'ono ilibe gulu lotsatsa lomwe limalimbikitsa momwe Bluetooth SIG imachitira akatswiri a BLE. Makina ambiri a Sub{{2}GHz ESL amayendera ma protocol okhudzana ndi omwe amapanga zilembo. Palibe mbiri yolumikizana. Kusintha mavenda kumatanthauza kulowetsa mulu wonse wolumikizirana.
Ndipo komabe, pamitundu ina yamasitolo, fiziki imapanga chisankho chothandiza kwambiri. Ma frequency otsika amatulutsa mafunde ataliatali. Mafunde aatali amalowa m'mashelufu azitsulo, makoma ogawa konkire, ndi mawonedwe afiriji bwino kwambiri kuposa ma siginecha a 2.4 GHz. Display Data, kampani ya ku UK{{4}yochokera ku ESL yopereka chithandizo ku ESL, inamanga nsanja yawo yonse mozungulira -1 GHz ndendende pachifukwa chimenechi - kuchuluka kwake komanso kulowetsa ma sigino m'malo ogulitsa zinthu zovuta. Malo amodzi a Sub-GHz ofikira amakhala okulirapo kuposa mawonekedwe ake a BLE kapena Wi-Fi. Malo ocheperako amatanthawuza kutsika mtengo kwa zomangamanga komanso kukonza kosavuta kwa maukonde.
Moyo wa batri ndi chinthu china chofunikira. Upangiri wamapangidwe a Silicon Labs' ESL umanena kuti kufikira zaka zisanu mpaka khumi pa selo yandalama ya CR2032 kumafuna bajeti yapakati pano yosachepera 10 µA - Sub-GHz FG22 SoC yawo imakwaniritsa 0.17 µA mu tulo tatikulu. Zazazikulu-zolemba E{1}}zolemba inkim'malo osungiramo katundu kapena m'misika yayikulu yokhala ndi zosintha chimodzi kapena zitatu tsiku lililonse, Sub-GHz nthawi zonse imakhala ndi moyo wautali kwambiri wogwira ntchito.
Zokwanira bwino kwambiri: ma hypermarket ndi -akuluakulu ogulitsa mabokosi opitilira 5,000 m², malo osungiramo zinthu ndi malo okhala ndi zitsulo zotchingira, unyolo wozizira ndi malo oziziritsidwa, komanso kutumiza kulikonse komwe kuchepetsa zomangamanga ndi kukulitsa moyo wa batri ndizofunika kwambiri kuposa bandwidth. Makasitomala athu akutulutsa E-malebulo a shelufu ya inki m'masitolo akuluakulu-amitundu yonse amakhala akuyenda ku Sub-GHz.
Mbali-ndi-Side Comparison
| Metric | Bluetooth LE 5.4 | Wi-Fi | Sub-GHz (433/868/915 MHz) |
|---|---|---|---|
| Ikugwira Ntchito Mu-Masitolo Osiyanasiyana | 10–30 m | 15–35 m | 50–200 m |
| Moyo wa Battery (E-inki, zosintha 1–3/tsiku) | 3-5 zaka | 1-2 zaka | 5-10 zaka |
| Kupititsa kwa Data | Wapakati | Wapamwamba | Zochepa |
| Zolemba pa Access Point | ~ 32,000 (spec) / mazana ofanana | Zimasiyanasiyana ndi kuchuluka kwa AP | Zikwi pachipata |
| Mtengo wa Gateway (wokhazikitsidwa) | $1,000–$2,000 | Amagwiritsa ntchito netiweki yomwe ilipo | $500–$1,500 |
| Kusokoneza kwa 2.4 GHz | Inde | Inde | Palibe - gulu losiyana |
| Open Standard | Inde (BLE ESL Mbiri) | Inde (802.11) | Nthawi zambiri eni ake |
| Mawonekedwe Apamwamba Ogulitsa | Ang'onoang'ono-pakati ogulitsa, ogulitsa mankhwala | Bizinesi yokhala ndi IT yamphamvu | Hypermarkets, malo osungira |
Protocol Choice Ripples Kudzera mu Sitolo Yanu Yonse
Chinachake chomwe zolemba zofananira za protocol zimaphonya nthawi zonse: netiweki yanu ya ESL yopanda zingwe simagwira payokha. Malo olowera, zobwereranso mitengo, mapulogalamu oyang'anira - zonse zimakhudza makina a digito omwe ali m'sitolo. Ngati mukuthamanganokha-makamaka pakompyuta yantchitopotuluka, ma kiosks amenewo amakoka mitengo kuchokera pankhokwe yomweyo. Ngati ziwonetsero za shelefu-m'mphepete mwa LCD zili ndi zotsatsira, makina omwe amathandizira zowonerazo atha kuyambitsanso kampeni pa ma E{2}}malebulo a inki - anu pokhapokha ngati makinawo ali ndi API yofanana.
Tawona zotsatira zoyera kwambiri pamene makasitomala akukonzekera kutumizidwa kwa ESL pamodzi ndi kiosk ndi kutulutsa zizindikiro za digito, osati monga mapulojekiti atatu osiyana a IT. Mtengo womwe kasitomala amawuwona pa shelefu, sikirini ya endcap LCD, ndi{1}}paintaneti yobwereketsa zonse kuchokera kugwero limodzi, madandaulo amitengo - pomwe kusweka kwakukulu kwa golosale - kutsika mpaka ziro.
Mafunso Atatu Musanapereke
Kodi floor plan yanu ikuwoneka bwanji?Pharmacy ya 400 m² ndi hypermarket ya 12,000 m² ndi malo osiyanasiyana pawailesi. BLE imagwira yoyamba yokhala ndi magawo awiri kapena atatu. Yachiwiri mwina ikufunika Sub-GHz kuti isawononge denga ndi zipata.
Ndi zinthu ziti zomwe mukuwonetsa?Mitengo yokhazikika pa E-inki? Protocol iliyonse imakwaniritsa izi. Kutsatsa kwamavidiyo pazithunzi za LCD zoyendetsedwa? Mufunika Wi-zogwiritsa ntchito mu Fi. Mitengo ya Flash yomwe imasintha kangapo pa ola? Tsimikizirani kuti protocol yanu imatha kusunga voliyumu yosinthira popanda kukhetsa mabatire nthawi isanakwane.
Ndi chiyani chinanso chomwe chimagawana nawo makanema anu?Sitolo yomwe ili kale ndi 2.4 GHz - kasitomala Wi-Fi, masensa a IoT, masikani a m'manja - avutika ndi makina ena a 2.4 GHz omwe ali pamwamba. Sub-GHz imagwira ntchito mopanda anthu ambiri.
Palibe protocol imodzi yomwe ili yabwino kwambiri padziko lonse lapansi. Ngati wothandizira wanu wa ESL amangopereka njira imodzi yopanda zingwe ndipo sangathe kufotokozera komwe sikukafupikitsa, zimakuuzani zina. Ngati mukufuna kuyesa zolemba pama protocol anu enieni musanapange pamlingo,pemphani zitsanzo zowunika- milungu iwiri mumsewu umodzi imawonetsa zambiri kuposa pepala lililonse kapena masilayidi ogulitsa.
