Data Fields
attm_desc_t Struct Reference
BLE » Generic Attribute Profile (GATT) » Generic Attribute Profile (GATT) Server » Structures

Service(16-bit UUID) description. More...

`#include <ble_gatts.h>`

## Data Fields
uint16_t | uuid
uint16_t | perm
uint16_t | ext_perm
uint16_t | max_size

## Detailed Description

Service(16-bit UUID) description.

## Field Documentation

## ◆ ext_perm

uint16_t attm_desc_t::ext_perm

Attribute extended permissions, see Attribute Extend Permission.

- For Primary/Secondary/Included Services, this field is not used and should be set to 0.
- For Characteristic Declaration, this field is not used and should be set to 0.
- For Characteristic Extended Properties, this field is not used and should be set to 0.
- For Client Characteristic Configuration and Server Characteristic Configuration, value must be saved in user space, user needn't to set this value location bit. The UUID length type must be set to 0.

## ◆ max_size

uint16_t attm_desc_t::max_size

Attribute max size.

- For Primary/Secondary/Included Services, this field is not used, set to 0.
- For Characteristic Declaration, this field is not used, set to 0.
- For Characteristic Extended Properties, this field contains 2-byte value.
- For Client Characteristic Configuration and Server Characteristic Configuration, this field is not used, set to 0.
- For others, this field is attribute max size.

## ◆ perm

uint16_t attm_desc_t::perm

Attribute permissions, see Attribute Permission.

- For Primary/Secondary/Included Services, must be READ_PERM_UNSEC.
- For Characteristic Declaration, must be READ_PERM_UNSEC.
- For Characteristic Extended Properties, must be READ_PERM_UNSEC.
- For Characteristic Presentation Format, must be READ_PERM_UNSEC.
- For Characteristic Aggregate Format, must be READ_PERM_UNSEC.

## ◆ uuid

uint16_t attm_desc_t::uuid

16-bit LSB-first UUID

The documentation for this struct was generated from the following file:

- ble_gatts.h