Теговые технологии
A tag technology describes the physical way in which a device can interact with a ярлык. Tag technologies are based around a specific type of sensor and communications technology. Each tag technology has its own appropriate use case, преимущества, limitations and costs. The choice of which tag technology to use is an important decision which should be made in the planning phases of a Connected Things project.
Tag Technology ComparisonA high-level comparison of the most common tag technologies.
| Tag Technology | Barcode | НФК | УВЧ RFID | БЛЕ |
|---|---|---|---|---|
| Использование | Printed labels; low-cost items | Better usability; безопасный; near-field range | Промышленное; far-field range | Geolocation; far-field range |
| Диапазон чтения | 1м | 5 см; 50 cm ⁽¹⁾ | 10 м | 100 м |
| Interaction | Imaging | Touch | Сканировать | Push |
| Power | Никто | Harvested | Harvested or battery | Battery or wall |
| Unique Id | Нет | Да | Да | Да |
| Память | Less than 1Kb | 32 bytes to 8 Kb | 0 к 128 байты | 20 байты |
| Cloneable | Да | Нет | Нет | Да |
| Hardware in Phones | Да (camera) | Да (NFC controller) | Нет | Да (Bluetooth controller) |
| App Required | Нет | Sometimes ⁽²⁾ | Да | Да |
| Lowest Cost | $0.005 доллар США | $0.04 доллар США | $0.035 доллар США | $3.00 доллар США |
| Tag Implementations | Barcode Formats | NFC Chip Types | UHF RFID Chips | |
| Additional Information | Barcode | НФК | УВЧ RFID |
- The range of an NFC-чип is dependent on the tag technology and the device reading the NFC tag; learn more about NFC tag performace.
- Both iOS and Android have the basic ability to read an NFC tag with a NDEF website record and open it in a browser; more sophisticated functionality including writing NFC tags requires a 3rd party app.
