"Concurrent" scanning and advertising. Problem in ble connection.

[Al Bundy]

In my application I have to advertise and scan, I know these two actions are multiplexed and there are no problems when there is no BLE connection (I use s130, sdk 9.0.0). However when I am connected to my smartphone and I want to change some characteristic using: err = sd_ble_gatts_hvx(p_bws->conn_handle, &hvx_params); I got an BLE_ERROR_GATTS_SYS_ATTR_MISSING error, however when I do not initialize scanning in my application I do not get this error and my BLE communication works fine.

My first question is, why do I need to call sd_ble_gatts_sys_attr_set() when both scanning and advertising is initialized and do not need to call it when scanning is off?

The second one is, what parameters should I call sd_ble_gatts_sys_attr_set() with, when I am not going to do any bonding in my application ?

[Anders Strand]

Hi.

I am not sure why you only encounter this error after initiating scanning. Can you post you code?

The correct way to call the function without bonding will be:

err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);