Posts: 5,409. Grill marks have been discussed many times over the years. Sure, they are pretty and make a really strong statement about the meat, but many high-dollar restaurants reportedly draw their grill marks on with a meat-marker, while others brush on a coat of sugar water prior to it hitting the hit grill.
Pointers to member functions in C++. This is how C++ uses function pointers when dealing with member functions of classes or structs. These are invoked using an object pointer or a this call. They are type safe in that you can only call members of that class (or derivatives) using a pointer of that type.
Can't use attachInterrupt in a library. 1  So the compiler (not the IDE) tells you exactly what's wrong: 2  So, while attachInterrupt () takes a function pointer of type void (*) (), you're trying to pass it a non-static member function, which you can't. You can try making the member function static and casting: