console-runner for RPi

console-run@.service

[Unit]
Description=Console runner for pi user

[Service]
Type=simple
ExecStartPre=+/bin/chown pi /dev/%i
ExecStart=/usr/bin/conrun-server
ExecStopPost=+/bin/chown root /dev/%i
User=pi
StandardInput=tty-fail
StandardOutput=tty
StandardError=journal
TTYPath=/dev/%i

[Install]
WantedBy=multi-user.target

org.ev3dev.ConsoleRunner.conf

<!DOCTYPE busconfig PUBLIC
    "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
    "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">

<busconfig>
    <policy user="pi">
        <allow own="org.ev3dev.ConsoleRunner"/>
        <allow send_type="method_call"/>
    </policy>
</busconfig>