This script is intended to be used with a serial connected plotter/cutter.
It will split the file into blocks <=10kB to prevent the plotter from choking on data, as long as data is waiting, the tool will resume with the next part after user input.
usage is simple:
./plottool file.hpgl will simply print the data to /dev/ttyUSB0
./plottool -p /dev/ttyUSB4 file.hpgl will do the same but to port /dev/ttyUSB4
this script has been tested with a plotter @Stratum0: https://stratum0.org/wiki/Cogi_CT-630