Arduino-compatible firmware for reading GPS module data and storing in text files inside an SD card.
Related to the brazillian project: * http://cta.if.ufrgs.br/projects/estacao-maregrafica
Inside the "firmware" directory there is an Arduino-IDE-ready project to be compiled for the Adafruit Feather32u4 board (uses same chip as Leonardo). You can either use the Arduino IDE or the PlatformIO by executing:
$ cd firmware $ make
make help to see all make commands or explore the file
Along with the production firmware there are couple of Adafruit examples useful for debugging the board.