Elegoo Penguin Bot Revisited

Refactored/cleaned up PenguinBot.ino file (kept other files almost unchanged), in order to:

• Decrease ROM occupation from 22654 bytes (70%) to 19484 bytes (60%),

• Decrease globals usage from 1614 bytes (78%) to 1330 bytes (64%),

• Decrease lines of code from 1160 to 1136,

• Keep most of features unchanged,

• Remove useless parts (e.g. uncalled functions, unused globals),

• Try and make code clearer (use english everywhere),

• Try and make code cleaner (use homogeneous naming rules),

• Try and make code easier to sustain/modify, by factorizing things, (e.g. by removing disparate calls to servoAttach()/servoDetach(), which might break the Bot's runtime, when moving some code around),

• Add voice MP3s announcing mode changes, commands, etc. to help understand current state.

Notes

• Started from so-called version 1.0.2018.11.07, from Eleogoo website,
• Don't forget to copy MP3s from MusicFiles directory to the Bot's micro SD.