[Unit]
Description=Serial heartbeat responder
After=network.target

[Service]
Type=notify
NotifyAccess=all
Environment=PYTHONUNBUFFERED=1
Environment=SERIAL_PORT=/dev/ttyUSB0
Environment=SERIAL_BAUDRATE=9600
ExecStart=/usr/bin/env python3 /opt/watch-watch-server/serial_heartbeat.py --port ${SERIAL_PORT} --baudrate ${SERIAL_BAUDRATE}
Restart=on-failure
RestartSec=3
WatchdogSec=20
WorkingDirectory=/opt/watch-watch-server
StandardOutput=journal
StandardError=inherit

[Install]
WantedBy=multi-user.target