BLE notification/Indicate callback (ESP_GATTC_NOTIFY_EVT) not triggered (IDFGH-12444)

[AbiotsLabs]

Answers checklist.

• [X] I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• [X] I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• [X] I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

1. I have read the similar issues and documentations and have done following steps:
   1. esp_ble_gattc_register_for_notify(gattc_if, p_data->connect.remote_bda, gl_profile_tab[PROFILE_A_APP_ID].char_handle);
   2. After this got the response ESP_GATTC_REG_FOR_NOTIFY_EVT, in this wrote the following code if (param->reg_for_notify.status == ESP_GATT_OK) { ESP_LOGI(HUB_TAG, "Registered for notifications!"); esp_gattc_descr_elem_t *descr_elem_result = NULL; uint16_t count = 1; uint16_t notify_en = 2; esp_err_t ret_status; descr_elem_result = (esp_gattc_descr_elem_t *)malloc(sizeof(esp_gattc_descr_elem_t) * count); if (!descr_elem_result) { ESP_LOGE(HUB_TAG, "malloc error, gattc no mem"); } else { ret_status = esp_ble_gattc_get_descr_by_char_handle( gattc_if, gl_profile_tab[PROFILE_A_APP_ID].conn_id, gl_profile_tab[PROFILE_A_APP_ID].char_handle, notify_descr_uuid, descr_elem_result, &count); if (ret_status != ESP_GATT_OK) { ESP_LOGE(HUB_TAG, "esp_ble_gattc_get_descr_by_char_handle error"); } /* Every char has only one descriptor in our 'ESP_GATTS_DEMO' demo, so we used first 'descr_elem_result' */ if (count > 0 && descr_elem_result[0].uuid.len == ESP_UUID_LEN_16 && descr_elem_result[0].uuid.uuid.uuid16 == ESP_GATT_UUID_CHAR_CLIENT_CONFIG) { ESP_LOGD(HUB_TAG,"Enabling the notifications"); ret_status = esp_ble_gattc_write_char_descr(gattc_if, gl_profile_tab[PROFILE_A_APP_ID].conn_id, descr_elem_result[0].handle, sizeof(notify_en), (uint8_t *)&notify_en, ESP_GATT_WRITE_TYPE_RSP, ESP_GATT_AUTH_REQ_NONE); } if (ret_status != ESP_GATT_OK) { ESP_LOGE(HUB_TAG, "esp_ble_gattc_write_char_descr error"); } /* free descr_elem_result */ free(descr_elem_result);
2. Now when i send the indication message from gatt server i am not getting any callback, but i can see the BT_GATT getting the notification updates but call back is not happening.
3. I (6481) BT_GATT: GATT_GetConnectionInfor conn_id=3 I (6481) BT_GATT: GATTC_SendHandleValueConfirm conn_id=3 handle=0xd D (6491) BT_GATT: notif_count=3 D (6541) BT_GATT: gatt_get_ch_state: ch_state=4 D (6541) BT_GATT: gatt_process_notification D (6541) BT_GATT: gatt_get_link_encrypt_status status=0x8e D (6551) BT_GATT: gatt_cl_op_cmpl_cback I (6551) BT_GATT: GATT_GetConnectionInfor conn_id=3 I (6561) BT_GATT: GATTC_SendHandleValueConfirm conn_id=3 handle=0xd D (6561) BT_GATT: notif_count=3 D (6621) BT_GATT: gatt_get_ch_state: ch_state=4 D (6621) BT_GATT: gatt_process_notification D (6621) BT_GATT: gatt_get_link_encrypt_status status=0x8e D (6621) BT_GATT: gatt_cl_op_cmpl_cback I (6631) BT_GATT: GATT_GetConnectionInfor conn_id=3 I (6631) BT_GATT: GATTC_SendHandleValueConfirm conn_id=3 handle=0xd D (6641) BT_GATT: notif_count=3 D (6691) BT_GATT: gatt_get_ch_state: ch_state=4 D (6691) BT_GATT: gatt_process_notification D (6691) BT_GATT: gatt_get_link_encrypt_status status=0x8e D (6701) BT_GATT: gatt_cl_op_cmpl_cback I (6701) BT_GATT: GATT_GetConnectionInfor conn_id=3 I (6711) BT_GATT: GATTC_SendHandleValueConfirm conn_id=3 handle=0xd D (6711) BT_GATT: notif_count=3 D (6771) BT_GATT: gatt_get_ch_state: ch_s

[Alvin1Zhang]

Thanks for reporting.

[esp-zhp]

@AbiotsLabs hi,Have your issues been resolved now?

[tiibb]

Hi, It seems I had the same issue as OP. My mistake was that I assumed p_data->connect.remote_bda was defined when calling esp_ble_gattc_register_for_notify within ESP_GATTC_SEARCH_CMPL_EVT event.