How can I read attribute property?
Posted: Fri Mar 12, 2021 3:50 pm
Hello.
Is it possible to get attribule property, having The attribute handle?
During the ESP_GATTS_WRITE_EVT event, I have access to the write options and there is an attribute handle field there.
can i use this handle to get the properties of an attribute specified at creation time (ESP_GATT_CHAR_PROP_BIT_READ | ESP_GATT_CHAR_PROP_BIT_WRITE | ESP_GATT_CHAR_PROP_BIT_NOTIFY):
Is it possible to get attribule property, having The attribute handle?
During the ESP_GATTS_WRITE_EVT event, I have access to the write options and there is an attribute handle field there.
Code: Select all
struct gatts_write_evt_param {
uint16_t conn_id; /*!< Connection id */
uint32_t trans_id; /*!< Transfer id */
esp_bd_addr_t bda; /*!< The bluetooth device address which been written */
uint16_t handle; /*!< The attribute handle */
uint16_t offset; /*!< Offset of the value, if the value is too long */
bool need_rsp; /*!< The write operation need to do response */
bool is_prep; /*!< This write operation is prepare write */
uint16_t len; /*!< The write attribute value length */
uint8_t *value; /*!< The write attribute value */
} write; Code: Select all
esp_err_t add_char_ret = esp_ble_gatts_add_char(gl_profile_tab[PROFILE_A_APP_ID].service_handle,
&gl_profile_tab[PROFILE_A_APP_ID].char_uuid, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE,
ESP_GATT_CHAR_PROP_BIT_READ | ESP_GATT_CHAR_PROP_BIT_WRITE | ESP_GATT_CHAR_PROP_BIT_NOTIFY,
&gatts_demo_char1_val, NULL);