[Unit]
Description=Attach /dev/ttyS1 to BlueZ stack using bcm43xx type
Wants=bluetooth.service
Before=bluetooth.service
After=dev-ttyS1.device

[Service]
Type=simple
ExecStartPre=/usr/sbin/rfkill unblock bluetooth
ExecStart=/usr/bin/hciattach -n -s 115200 /dev/ttyS1 bcm43xx 2000000
ExecStopPost=/usr/sbin/rfkill block bluetooth