SourceVu will show references to esp_ble_gatts_add_char_descr() from the following samples and libraries:
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esp_ble_gatts_add_char_descr() function
Add a characteristic descriptor
Syntax
esp_err_t esp_ble_gatts_add_char_descr (uint16_t service_handle,
esp_bt_uuid_t *descr_uuid,
esp_gatt_perm_t perm,
esp_attr_value_t *char_descr_val,
esp_attr_control_t *control);
Implemented in ![]()
esp_gatts_api.c:175
Return value
- ESP_OK: Success - ESP_ERR_INVALID_ARG: Invalid arguments - ESP_FAIL: Failure due to other reasons
Notes
1. This function triggers `ESP_GATTS_ADD_CHAR_DESCR_EVT`. 2. `control->auto_rsp` should be set to `ESP_GATT_AUTO_RSP` or `ESP_GATT_RSP_BY_APP`. 3. For stack respond attribute (`ESP_GATT_AUTO_RSP`), `char_val` should not be NULL and `char_val->attr_max_len` must be greater than 0.