[Unit] Description=Connman NTP service Requires=connman.service After=connman.service [Service] Type=oneshot ExecStart=/bin/bash -c "dbus-send --system --type=method_call --print-reply --dest=net.connman / net.connman.Clock.SetProperty string:'TimeUpdates' variant:string:'auto'" ExecStop=/bin/bash -c "dbus-send --system --type=method_call --print-reply --dest=net.connman / net.connman.Clock.SetProperty string:'TimeUpdates' variant:string:'manual'" RemainAfterExit=yes [Install] WantedBy=multi-user.target