Change hard-coded hardware serial to ports defined dynamically

[awickert]

Perhaps spin off into separate library for more code reusablity by others, and then instantiate class, e.g.,

HardSerial _Serial1(1);
HardSerial _Serial2(2);
HardSerial _Serial3(3);

and then use these later throughout the code while passing a HardSerial object to functions.

[awickert]

This will be for a future version of the ALog -- the ATMega328 version (current one) has only one Serial input.