systemd service file

ff-schild.service

+[Unit]
+Description = ff-schild daemon
+After = network-online.target
+Wants = network-online.target
+
+[Service]
+ExecStart = /bin/bash -c "/opt/ff-schild/freifunk.sh > /dev/ttyS0"
+KillSignal = SIGINT
+
+[Install]
+WantedBy = multi-user.target