#pragma once
//
//    FILE: I2CKeyPad.h
//  AUTHOR: Rob Tillaart
// VERSION: 0.1.2
// PURPOSE: Arduino libray for 4x4 KeyPad connected to an I2C PCF8574
//     URL: https://github.com/RobTillaart/I2CKeyPad

#include "Arduino.h"
#include "Wire.h"

#define I2C_KEYPAD_LIB_VERSION (F("0.1.2"))

#define I2C_KEYPAD_NOKEY          16
#define I2C_KEYPAD_FAIL           17

class I2CKeyPad
{
public:
  I2CKeyPad();

#if defined(ESP8266) || defined(ESP32)
  bool    begin(uint8_t sda, uint8_t scl, uint8_t address);
#endif
  bool    begin(uint8_t address);
  
  uint8_t getKey();
  uint8_t getLastKey() { return _lastKey; };
  bool    isPressed();  
  bool    isConnected();

private:
  uint8_t _address;
  uint8_t _lastKey;
  uint8_t _read(uint8_t mask);
};

// -- END OF FILE --