stty -F /dev/ttyUSB0 115200 raw cs8 -cstopb -echo crtscts
convert shiplabel.png shiplabel.pdf
convert -density 203.2 -pointsize 20 -annotate +5+720 "_____________________\n           - ZERBRECHLICH -" shiplabel.pdf shiplabelo.png
python png2escp.py shiplabelo.png >/dev/ttyUSB0