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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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PM0237 数据表(PDF) 25 Page - STMicroelectronics |
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PM0237 数据表(HTML) 25 Page - STMicroelectronics |
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25 / 88 page  DocID027104 Rev 2 25/88 PM0237 Bluetooth low energy technology 88 A service shall contain a service declaration and may contain definitions and characteristic definitions. A service includes declaration follows the service declaration and any other attributes of the server. “Include service attribute handle” is the attribute handle of the included secondary service and “end group handle” is the handle of the last attribute within the included secondary service. 1.8.4 GATT procedures The Generic Attribute Profile (GATT) defines a standard set of procedures allowing to discover services, characteristics, related descriptors and how to use them. The following procedures are available: • Discovery procedures (Table 16) • Client-initiated procedures (Table 17) • Server-initiated procedures (Table 18) Table 15. Include declaration Attribute handle Attribute type Attribute value Attribute permissions 0xNNNN 0x2802 (UUID for include attribute type) Include service attribute handle End group handle Service UUID Read only, No authentication, No authorization Table 16. Discovery procedures and related response events Procedure Response events Discovery all primary services Read by group response Discovery primary service by service UUID Find by type value response Find included services Read by type response event Discovery all characteristics of a service Read by type response Discovery characteristics by UUID Read by type response Discovery all characteristics descriptors Find information response Table 17. Client-initiated procedures and related response events Procedure Response events Read characteristic value Read response event. Read characteristic value by UUID Read response event. Read long characteristic value Read blob response events Read multiple characteristic values Read response event. Write characteristic value without response No event is generated Signed write without response No event is generated Write characteristic value Write response event. |
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