call of overloaded AceButton(int) is ambiguous

[Petr Stehlík]

try

#define PIN 0
#include <AceButton.h>
using namespace ace_button;
AceButton button(PIN);

compiler will complain

call of overloaded 'AceButton(int)' is ambiguous

[Brian Park]

Yeah, it's an unfortunate side-effect of trying to make the constructor a little more flexible and consistent. The C++ compiler cannot distinguish between a nullptr and 0. The solution is:

AceButton button((uint8_t) PIN);

or

const uint8_t PIN = 0;

See the Warning section towards the end of https://github.com/bxparks/AceButton#AceButtonClass

[Edit; Add alternate solution using const uint8_t PIN = 0.]