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 Anders,

it was very strange because i found the problem is caused by the HIDS_INIT routine, because my applicatoin is sending multi-mdia keys instead of normal keyboard keys, and I modified the report map in the HID initial functions and suddenly it works but i have no idea why. I think i need to study the USB HID table if i want to find the root cause, anyway I still have thank you for your great support.

Best regard,

[Jacey]

Hi sam，

Unfortunately when i learn the demo named ble_app_hids_keyboard （SDK version is nRF5SDK160098a08e2、platform is n52832）and send keys to Xiaomi TV，i encounter the same problem with you.Do you still remember what you have modified?Could you please spare time to help me solve the problem!thank you!