From Hentschel
/* install software */
also enable i2c in /boot/config.txt
dtparam=i2c_arm=on
=== enable systemd service ===
* create file '''/lib/systemd/system/lcd.service''' with following content
[Unit]
Description=LCD Display Service
After=multi-user.target
Conflicts=getty@tty1.service
[Service]
Type=simple
ExecStart=/usr/bin/python /home/pi/script/lcd/lcd.py
StandardInput=tty-force
[Install]
WantedBy=multi-user.target