How to have control(play/pause & previous/next) over the Google Play Music app via a BLE link. I know I need HID over GATT but I downloaded the official doc and I cannot understand it one bit. What am I missing? I know there is no need to build a new app since I am using profile defined by the Bluetooth SIG. What do I need to study in order to implement the suitable arduino code in my BLE kit?
