WiFi worked on NEC Lavie LL750/M

You need a firmware for the device BCM20702A1-04ca-200b.hcd from https://github.com/winterheart/broadcom-bt-firmware.
  1. $ dmesg | grep bluetooth 
    [   16.452188] bluetooth hci0: Direct firmware load for brcm/BCM20702A1-04ca-200b.hcd failed with error -2
[703647.532507] [   1029]     0  1029     9137       83   118784       45             0 bluetoothd
[1081826.497891] [   1029]     0  1029    10551     1487   131072       45             0 bluetoothd
  2. Go to https://github.com/winterheart/broadcom-bt-firmware.
  3. find brcm/BCM20702A1-04ca-200b.hcd and copy to /lib/firmware/brcm.
  4. Reboot the machine.
  5. $ $ dmesg | grep -i blue 
    [   14.872713] Bluetooth: Core ver 2.22
[   14.872734] Bluetooth: HCI device and connection manager initialized
[   14.872737] Bluetooth: HCI socket layer initialized
[   14.872739] Bluetooth: L2CAP socket layer initialized
[   14.872742] Bluetooth: SCO socket layer initialized
[   15.065534] Bluetooth: hci0: BCM: chip id 63
[   15.066494] Bluetooth: hci0: BCM: features 0x07
[   15.082585] Bluetooth: hci0: Lavie
[   15.083499] Bluetooth: hci0: BCM20702A1 (001.002.014) build 0000
[   15.829498] Bluetooth: hci0: BCM20702A1 (001.002.014) build 1493
[   15.845509] Bluetooth: hci0: Broadcom Bluetooth Device
[   21.214420] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   21.214421] Bluetooth: BNEP filters: protocol multicast
[   21.214423] Bluetooth: BNEP socket layer initialized
[   31.913779] Bluetooth: RFCOMM TTY layer initialized
[   31.913785] Bluetooth: RFCOMM socket layer initialized
[   31.913787] Bluetooth: RFCOMM ver 1.11
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