[up]

asus usb-bt500

  1. download rtl8761b* from https://github.com/aczutro/android_hardware_realtek/tree/rtk1619/bt/rtkbt/Firmware/BT
  2. move to /lib/firmware/rtl_bt/
  3. ln -s … rtl8761bu_config.bin
  4. ln -s … rtl8761bu_fw.bin