GPStracker/README.md

Software build & programming:

First, install bootloader using USBASP:

cd optiboot
make install

Second, program the main software.

Alphanumeric display version:

cd soft
make install PROGPORT=COM16 LCD=alnum

Graphical display version:

cd soft
make install PROGPORT=COM16 LCD=graphic

Warning: remember to make clean when switching between versions.