bluetoothctl
power on
pairable on
agent on
default agent
default-agent scan on pair
trust quit
sudo rfcomm bind rfcomm0
screen /dev/rfcomm0
atz
atl1
ath1
atsp0
010D --> speed 012F --> fuel level
edit /etc/rc.local
rfcomm bind rfcomm99
vim /etc/systemd/system/dbus-org.bluez.service
add