I am confused about writing and reading matrix variables from EEPROM. I have read & write single values before but never did it with matrix.
But my main confusion is about the write order. As I said I have predifened values but these values should be updateable later on. If I write these predefined values to EEPROM at the setup loop it will reset the updates at each restart. Should I compile the skecth two times? First to upload the predifed values to EEPROM with EEPROM.write() in setup and then remove the write command and change it EEPROM.read() to retrive the data stored in the EEPROM?