[Unit]
Description=tcd
Requires=network.target
After=systemd-user-session.service network.target

[Service]
Type=simple
ExecStartPre=-/sbin/rmmod ftdi_sio
ExecStartPre=-/sbin/rmmod usbserial
ExecStart=/usr/local/bin/tcd /PATH_TO_INI_FILE
Restart=always

[Install]
WantedBy=multi-user.target