ble_advertising_advdata_update() gives me an error

Question

Hello, Second time in here, thank you so much for all the support so far! 
 I'm developing a Beacon BLE, I wanna be able to send data over Advertising or Scan response. So I've developed the function bellow and I'm calling it in a timer timeout handler. 
 void updateAdvertising() {
 /* Declaration of Error Code */
 ret_code_t err_code;
 ble_advdata_t advdata;

 uint8_t testData[8] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x11, 0x22};
 uint8_array_t data_array; // Array for Service Data structure.

 data_array.p_data = (uint8_t *)testData; // Pointer to the data to advertise.
 data_array.size = sizeof(testData); // Size of the data to advertise.


 ble_advdata_service_data_t service_data; // Structure to hold Service Data.
 service_data.service_uuid = CUSTOM_SERVICE_UUID;
 service_data.data = data_array; // Array for service advertisement data.

 memset(&advdata, 0, sizeof(advdata));

 advdata.name_type = BLE_ADVDATA_NO_NAME;
 advdata.include_appearance = false;
 advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;

 advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
 advdata.uuids_complete.p_uuids = &m_adv_uuids[0];

 advdata.p_service_data_array = &service_data; // Pointer to Service Data structure.
 advdata.service_data_count = 1;

 //sd_ble_gap_adv_stop(m_adv_handle);

 err_code = ble_advertising_advdata_update(&m_advertising, &advdata, NULL);
 APP_ERROR_CHECK(err_code);
} 
 
 Problem is: <error> app: ERROR 8 [NRF_ERROR_INVALID_STATE] at ../../../Advertising.c:143 PC at: 0x0002BC2F 
 
 it returns me that, I tried to pause the Advertisement and same result, I didn't try to pause the scan, but I believe it wont do much of a difference.

Einar Thorsrud · Accepted Answer

Hi, 
 Which SDK are you using? 
 Referring to SDK 17, when calling ble_advertising_advdata_update() the NRF_ERROR_INVALID_STATE can come either from the function itself, if advertising is not enabled. See this snippet from the implementation: 
 if (p_advertising->initialized == false)
 {
 return NRF_ERROR_INVALID_STATE;
 } 
 I do not see enough of you code to see if that is the case, but based on the description I assume no. If not, the error comes from sd_ble_gap_adv_set_configure(), and from the API doc: 
 * @retval ::NRF_ERROR_INVALID_STATE Invalid state to perform operation. Either:
 * - It is invalid to provide non-NULL advertising set parameters while advertising.
 * - It is invalid to provide the same data buffers while advertising. To update
 * advertising data, provide new advertising buffers. 
 The first is not the case when using ble_advertising_advdata_update(), but the second could be a problem for older SDK's, but should not happen with SDK version >= 16.