C++ code review

Hello, I am C++ self-learner and looking for someone who will review my C++ code of my simple personal project where I applied what I've learned _so far_. Code itself is for Arduino, however my point is still code itself. Arduino is not needed, only Arduino IDE for compilation check(if needed), and that's free software, working without HW. I'll provide details privately but briefly: -review has to be focused primarily on C++ and level of its object oriented potential utilization in my project + applying best practices for C++, code layout, ... -plain C is _not_ in the focus -Arduino knowledge is _not_ needed -specific methods which are used are also out of primary scope (specially everything Arduino-specific), however C/C++ optimization suggestions are welcomed Expectations from reviewer: -to be precise in his daily C++ programming work -programming by rules based on world-wide standards (etc. Google C++ standard) -to be willing (etc. to explain comments/suggestions and resulting questions from my side) -experience with programming micro-controllers is a nice plus There is chance for additional reviews needed from my side after I make some progress. Thanks