[Unit] Description=pyHeatpump fetch - retrieve the data from the serial port with modbus Wants=dev-ttyUSB0.device [Service] Type=simple WorkingDirectory=/var/lib/pyheatpump/ Environment="LOGLEVEL=INFO" ExecStart=/usr/bin/env pyheatpump fetch -t D -t A -t I ExecStop=/usr/bin/env pyheatpump supervise --since KillMode=mixed TimeoutStopSec=30 PrivateTmp=true