Disable Wi-Fi and/or Bluetooth on the Raspberry Pi 3
From KlavoWiki
vi /etc/modprobe.d/blacklist-radios.conf
#Wi-Fi blacklist brcmfmac blacklist brcmutil #Bluetooth blacklist btbcm blacklist hci_uart
vi /etc/modprobe.d/blacklist-radios.conf
#Wi-Fi blacklist brcmfmac blacklist brcmutil #Bluetooth blacklist btbcm blacklist hci_uart