How to deal with BLE_GATTS_EVT_SYS_ATTR_MISSING error?

[alivexiaoluo]

Hi,When I use nRF Connect app(IOS version) to connect my ble device,BLE_GATTS_EVT_SYS_ATTR_MISSING log information appears in my RTT Viewer(Picture IOS_Phone_Conncet).After about 96s，app(IOS version) will disconnect to my ble device.Disconnect Reason is 0x0016 (#define BLE_HCI_LOCAL_HOST_TERMINATED_CONNECTION 0x16 /**< Local Host Terminated Connection. */ in ble.hci.h).(Picture IOS_Phone_Disconnect). When i use nRF Connect(Andriod version),it have no this problem(Picture Andriod_Phone_connect). I want to know how to deal with BLE_GATTS_EVT_SYS_ATTR_MISSING error,it seems BLE_GATTS_EVT_SYS_ATTR_MISSING cause the disconnnection when connect to app(IOS version).

My ble device use nRF5_SDK_11.0.0_89a8197. IOS_Phone_Connect.png IOS_Phone_Disconnect.png Android Phone Connect.png

Regards,alivexiaoluo.

[Vidar Berg]

BLE_GATTS_EVT_SYS_ATTR_MISSING is typically handled inside the peer manager / device manager module (sys att are store persistently when bonded). Add the following to code to your on_ble_evt() handler if you are not using either of these modules :

    case BLE_GATTS_EVT_SYS_ATTR_MISSING:
        // No system attributes have been stored.
        err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
        APP_ERROR_CHECK(err_code);
        break; // BLE_GATTS_EVT_SYS_ATTR_MISSING

[Vidar Berg]

Depending on configuration, the connection parameter module may terminate the link if the central device does not accept a connection interval within your max/min range. Please check if .disconnect_on_fail parameter is set to false in conn_params_init().