# Archive Old sketches kept for reference. They are **not** built. The `.txt` extension keeps PlatformIO from compiling them. - `SerialAPI_nano_old.cpp.txt`: an earlier version of the Nano serial firmware, from before the EEPROM timing and the default flip time were added. - `marquee_demo.cpp.txt`: a scrolling text (marquee) demo, including an umlaut test.