about BLE_HIDS_EVT_NOTIF_ENABLED

[sam]

Hi Nordic team,

I have a simple HID BLE device which send volume+/- multimedia keys to a Android device, it works well if it is first time to pair with the Android device, but if I switch off Bluetooth in Android's setting menu and switch on again, the volume+/- keys no longer working.

I checked and debugged and found it is caused by the BLE device not getting the BLE_HIDS_EVT_NOTIF_ENABLED from the Android phone, so the HVX return code is 0x8 and failed. I also search the forum and found there's no way to enable the notify on peripheral side, I also found there're solutions is to call "sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0)", but I'm not sure where to put this function, I have tried that function in "BLE_GAP_EVT_CONNECTED", "BLE_GATTS_EVT_SYS_ATTR_MISSING" events but none of them works.

Any suggestion where am I doing wrong and how to fix this to enable the notify? Thanks very much..

added main.c here: main.c

[sam]

Hi,

Thanks for the reply, in addition to main.c, i also added a lbs(LED & Button service) sample code in my project, i did find device manager called the function sd_ble_sys_attr_get/set(can't remember the full function name) but the return code is failed(softdevice not ready) or err_code = 0x3002, it looks like device manager has failed to save to flash and retrieve from it.

I will upload my main.c tomorrow, before that, any suggestion that why DM has failed to store/reload the CCCD? My other question is, if DM successfully store/reload the CCCD value, then the notification will be enabled?

Thanks very much..