https://devzone.nordicsemi.com/f/nordic-q-a/67584/how-can-evaluate-remote-control-media-and-call-for-nrf52840I am new at Bluetooth. I want to design remote media control(volume up,volume down, play/pause, next track,previous track) and call answer or reject. I have tried to make with HID protocol but this case I can not answer or reject call and screen keyboarden-USTelligent Community 13Mon, 26 Oct 2020 14:22:13 GMThttps://devzone.nordicsemi.com/thread/276911?ContentTypeID=1Mon, 26 Oct 2020 14:22:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0f507e95-7a98-4a66-a2d5-e31b410a94acKenneth<p>Typically when you connect a BLE keyboard to an mobile phone, then the native on-screen display is disabled while connected. So you will need to disconnect the keyboard to get the native on-screen display back.</p> <p>To call and reject calls, you would need to to check with the mobile operating systems if they allow this. I don&#39;t expect this is possible using HID, instead you may need to create an app on the phone that can connect to the BLE peripheral device, and use custom services and characteristics to handle calls though the app.</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>