Tupela mun i go pinis, wanpela lain bilong ol 'mid-sais supamaket long Sauten Yurop i askim mipela long kolim wanpela 'electronic shelf label rollout' bilong 22 stua. Tim bilong ol long baim ol samting i bin kisim pinis tripela kain sistem - wanpela i yusim Bluetooth LE, wanpela i yusim Wi-Fi, na wanpela i yusim 433 MHz redio. Olgeta wan wan vendor i tok olsem bilong ol em i nambawan. Nogat wanpela i tok klia aninit long wanem ol kondisen em i bin nogut tru. Dispela toktok i kirapim mipela long raitim dispela stori.
Tripela wireless protokol famili i bosim ol ESL deploymen nau: Bluetooth Low Energy (BLE, moa yet stat long 5.4 spesifikasen), Wi-Fi, na Sub-GHz redio (433 MHz long Esia, 868 MHz long Yurop, 915 MHz long Not Amerika). Wanwan protokol i save stretim wanpela hevi tru. Wanwan i kamapim ol samting we ol 'vendor brochure' i no save tingim gut. Dispela em samting mipela i bin lukim long ol stua tru.
Bluetooth LE: Open Standard, Still Maturing long Scale
Bluetooth i gat bikpela strong i stap baksait long en. Bluetooth SIG i pablisim wanpela ESL Profail we i kamap long Bluetooth 5.4's PAwR (Periodic Advertising with Responses) we i gat - wanpela rot we i larim wanpela 'access point' i salim ol komand i go long planti tausen 'label' insait long ol taim slot, na bihain kisim ol bekim na i no gat ol wanwan koneksen.
Silicon Labs i bin testim dispela long wanpela 1,500-node netwok insait long lab bilong ol. EM Microelectronic i salim em|bleu SoC long 1.8×1.8 mm tasol wantaim 200 nA dip slip karent - liklik inap na i no gat planti mani inap long putim insait long enliklik 2.66-inch E-ink tags. Wantaim moa long 5 bilien Bluetooth divais we ol i save salim long olgeta yia, ol kos bilong ol komponen i kisim helpim long bikpela ekonomi bilong skel.
Long ol ritela, gutpela samting em i 'vendor flexibility'. Wanpela open standet i min olsem yu ken miksim ol 'access point' bilong wanpela saplaia wantaim ol 'label' bilong narapela. Dispela em i wanpela gutpela senis long 'vendor lock-in we i bin bagarapim ESL long planti yia. Ol slip karen aninit long 2 μA em i save kamap long ol BLE ESL sipset, na Bluetooth 5.4 spec i sapotim samting olsem 32,600 lebol long wanwan akses poin netwok long pepa.
Tok: "long pepa" em i bikpela samting long hia. Ol bikpela -skel groseri diploimen long BLE i yangpela yet taim yumi skelim wantaim ol 'proprietary' sistem we i bin wok inap long 10-pela yia. Rigado, wanpela IoT 'gateway vendor' we i wok long ESL, i putim pe bilong wanwan 'gateway' long $1,000 i go inap $2,000 taim ol i putim - na wanpela bikpela supamaket i ken nidim 10-pela o moa. BLE i wok long 2.4 GHz, na i save serim 'spectrum' wantaim ol Wi-Fi routa, ol kastoma fon, ol 'microwave', na olgeta arapela waiales divais insait long bilding. Insait long wanpela stua we i gat planti manmeri, dispela hevi inap long mekim ol prais i go bek long taim bilong bikpela stua.
Gutpela samting: ol famasi, ol stua, na ol stua aninit long 2,000 m2 - moa yet ol dispela we i gat ol BLE beacons bilong bihainim ol aset. Ol ritela sosing5.8-inch BLE-capable shelf labelsdispela apdet long wanpela tablet we i no gat planti infrastraksa bai painim dispela protokol i gutpela.
Wi-Fi: Yusim Netwok Bilong Yu - Tasol Baset bilong Bateri
Toktok i stret: stua bilong yu i gat pinis 'enterprise Wi-Fi' long olgeta hap, olsem na lusim ol nupela 'gateways' na konektim ol ESL bilong yu stret long netwok we i stap pinis. Long ol bikpela entaprais sen we i bin putim bikpela mani pinis long ol komesel ekses poin wantaim ful kavrej, integresen matematiks i luk naispela.
Wi-Fi i save givim bikpela data truput moa long BLE o Sub-GHz. Dispela gutpela samting i kamap ples klia taim yu wok long pusim ol gutpela grafik konten - ol piksa bilong prodak, ol promosen animesen - i go longLCD-bes dijitel prais skrinna i no ol simpol E-ink tag. WANPELA15.6-inch LCD skrinlong ranim ol promosen long wanpela 'endcap' i nidim 'bandwidth' we ol E-ink prais tag i no nidim.
Dispela hevi i kamap long tupela hap. Namba wan, pawa konsumsen. Wi-Fi i save kisim planti moa karent winim BLE o Sub-GHz long olgeta taim bilong transmisin. Wanpela E-ink lebol long Sub-GHz redio i ken wok inap 5-pela i go inap 8-pela yia long wanpela koin sel wantaim wanpela i go inap tripela apdet long olgeta de. Wankain lebol long Wi-Fi? Twelpela i go inap long eitpela ten mun. Long skel - planti tausen lebol long planti stua - dispela i min olsem wanpela program bilong senisim bateri we i save kamap planti taim, operesen tim bilong yu i mas kisim. Namba tu, netwok i pas pas. Ol Wi-Fi ESL i save resis long kisim taim bilong redio wantaim ol POS terminal, ol kastoma divais, ol hanheld skena, na ol self-chekaut kiosk. Long taim bilong Sarere apinun, dispela kompetisen i no samting bilong tingting tasol.
Gutpela samting: ol stua we i gat gutpela, gutpela Wi-Fi infrastraksa, ol stua we i gat pawa LCD dijitel sain (we laip bilong bateri i no bikpela samting bikos ol skrin i pas), na ol i skelim long planti handet na i no planti ten tausen lebol.
Sub-GHz (433/868/915 MHz): Nogat Glamour, Long Range, Long Battery
Sub-GHz redio i no gat wanpela maketing bodi we i promotim em olsem Bluetooth SIG i save sempionim BLE. Planti Sub-GHz ESL sistem i save ranim ol 'proprietary protocols' we i stret long kampani i wokim 'label'. I no gat wanpela profail bilong wok bung wantaim. Senisim ol vendor i min olsem senisim olgeta komunikesen stak.
Tasol, long sampela kain stua, ol samting bilong fisiks i mekim em i kamap gutpela samting tru. Ol liklik frikwensi i save kamapim ol longpela wevlengt. Ol longpela wevlengt i save go insait long ol ain sel, ol simen wol, na ol 'refrigerated display cases' gut tru winim ol 2.4 GHz signal. Display Data, wanpela UK-bes ESL provaida, i bin wokim olgeta pletfom bilong ol klostu long Sub-1 GHz long dispela as stret - maksimum ranj na signal penetresen insait long ol kompleks ritel envairomen. Wanpela Sub-GHz 'access point' i karamapim bikpela hap graun moa long BLE o Wi-Fi. Liklik 'access points' i min olsem infrastraksa kos i go daun na netwok plening i isi.
Laip bilong bateri em i narapela bikpela samting. Silicon Labs' ESL disain gaidens i tok olsem long winim 5-pela i go inap 10-pela yia long wanpela CR2032 koin sel i nidim wanpela averej karent baset aninit long 10 μA - Sub-GHz FG22 SoC bilong ol i winim 0.17 μA long dip slip. Bilongbikpela-fomat E-ink lebolinsait long ol haus kago o haipamaket we i gat wanpela o tripela apdet long olgeta de, Sub-GHz i save givim longpela taim bilong wok.
Gutpela samting: ol 'hypermarket' na ol bikpela '-boks ritela antap long 5,000 m2, ol haus kago na ol 'logistics' envairomen wantaim ol 'metal racking', ol 'cold chain' na ol 'refrigerated' eria, na olgeta kain wok we wok we daunim infrastraksa na mekim 'battery life' i kamap bikpela samting moa long 'bandwidth'. Ol klaien bilong mipela i save salim ol E-ink shelf lebol long ol bikpela-fomat stua i save pulim ol i go long Sub-GHz.
Sait-long-Sait Skelim
| Metric | Bluetooth LE 5.4 | Wi-Fi | Sub-GHz (433/868/915 MHz) |
|---|---|---|---|
| Ifektiv Insait long-Stoa Range | 10–30 m | 15–35 m | 50–200 m |
| Laip bilong bateri (E-ink, 1-3 apdet/de) | 3-5 yia | 1-2 yia | 5-10 yia |
| Data Throughput | I no bikpela | Hai | Daunbilo |
| Ol lebol long wanwan Akses Poin | ~32,000 (spec) / planti handet | I senis long AP kapasiti | Planti tausen long wan wan geit |
| Gateway Cost (install) | $1,000–$2,000 | Yusim netwok we i stap pinis | $500–$1,500 |
| 2.4 GHz Intaferens | Yes | Yes | Nogat - seperet ben |
| Open Standet | Yes (BLE ESL Profail) | Yes (802.11) | Planti taim em i bilong ol yet |
| Gutpela Stoa Fomat | Ol liklik-namel stua, ol famasi | Entaprais wantaim strongpela IT | Ol bikpela maket, ol haus kago |
Protocol Choice i go long olgeta hap bilong stua bilong yu
Samting we ol atikol bilong skelim ol protokol i save lusim: ESL waiales netwok bilong yu i no save wok wanpis. Ol 'access points', 'pricing backend', 'management software' - olgeta dispela i tatsim ol narapela dijitel sistem insait long stua. Sapos yu ranol 'self-service touchscreen kiosksbilong sekim, ol dispela 'kiosk' i save kisim prais long wankain databes. Sapos 'shelf-edge LCD bar i soim ol 'run promotions' insait long 'aisle', 'content engine' we i givim ol dispela skrin i ken kirapim ol 'campaign' long ol 'E-ink labels - bilong yu tasol sapos ol sistem i serim wankain API leia.
Mipela i lukim ol gutpela risalt taim ol klaien i plenim ESL diploimen bilong ol wantaim 'kiosk' na 'digital signage' bilong ol, na i no olsem tripela seperet IT projek. Taim prais we kastoma i lukim long 'shelf tag', 'endcap LCD screen', na 'self-checkout terminal' olgeta i kam long wanpela sos, ol komplen bilong prais - bikpela hevi tru insait long stua - i pundaun klostu long zero.
Tripela Askim Pastaim Long Yu Komit
Plen bilong plua bilong yu i luk olsem wanem?Wanpela 400 m2 famasi na wanpela 12,000 m2 haipamaket em ol narapela narapela redio envairomen. BLE i save lukautim namba wan wantaim tupela o tripela 'access point'. Namba tu ating i nidim Sub-GHz long abrusim pasin bilong bagarapim siling wantaim ol geit.
Yu soim wanem ol samting?Ol prais i no senis long E-ink? Olgeta protokol i save lukautim dispela. Ol promosen bilong vidio long ol LCD skrin i gat pawa? Yu nidim 'throughput' bilong Wi-Fi. Flash prais we i save senis planti taim long wanpela aua? Yu mas save olsem 'protocol' bilong yu inap long holim 'update volume' na i no inap long pinisim ol bateri hariap.
Wanem samting moa i wankain olsem ol 'airwaves' bilong yu?Wanpela stua we i pulap pinis long 2.4 GHz - kastoma Wi-Fi, IoT sensa, hanheld skena - bai hatwok wantaim narapela 2.4 GHz sistem i stap antap. Sub-GHz i wok insait long wanpela 'band' we i no gat planti manmeri tumas.
I no gat wanpela protokol tasol i gutpela long olgeta hap. Sapos ESL saplaia bilong yu i givim wanpela 'wireless' opsen tasol na i no inap long tok klia long wanem hap em i sot, dispela i tokim yu long wanpela samting. Sapos yu laik traim ol 'label' long olgeta 'protocol' insait long stua bilong yu pastaim long yu mekim wok long skel,askim long ol sempel bilong skelim- tupela wik insait long wanpela 'live aisle' i soim moa long olgeta 'spec sheet' o 'vendor slide deck'.
