###### tags: `Arduino` `Arduino 實作`
# YK04-MT CodeModule

/*
  YK04 Module, Multiple Reading

  Reads a press of the remote control based on the YK04 driver
  and displays information in the default Serial.

  Multiple reading of the remote control.
  If the remote control is clamped,
  returns a pressed button value.
  Return value of pressing the remote control:
    Button::A - A button is pressed;
    Button::B - B button is pressed;
    Button::C - C button is pressed;
    Button::D - D button is pressed;
    Button::NOT - not pressed.

  https://github.com/YuriiSalimov/YK04_Module

  Created by Yurii Salimov, February, 2018.
  Released into the public domain.
*/
#include <YK04_Module.h>

#define A_PIN 12   // (D0)
#define B_PIN 11  // (D1)
#define C_PIN 10  // (D2)
#define D_PIN 9  // (D3)
String msg = "";

const int mt[4] = {4, 5, 6, 7};

YK04_Module* module;

// the setup function runs once when you press reset or power the board
void setup() {
  Serial.begin(9600);
  for (int i = 0; i < 4; i++) {
    pinMode(mt[i], OUTPUT);
  }
  module = new YK04_Module(A_PIN, B_PIN, C_PIN, D_PIN);
  /* Or if you need to invert a signal of buttons pressing
    module = new YK04_Module(A_PIN, B_PIN, C_PIN, D_PIN, true);
  */
}

// the loop function runs over and over again forever
void loop() {
  Serial.print("YK04, Multiple Reading: ");
  Serial.println(buttonTitle(module->multipleRead()));

  delay(100); // optionally, only to delay the output of information in the example
}

/**
  Return title of the input button.
*/
String buttonTitle(const YK04_Module::Button button) {
  switch (button) {
    case YK04_Module::Button::NOT:
      digitalWrite(mt[0], 0);
      digitalWrite(mt[1], 0);
      digitalWrite(mt[2], 0);
      digitalWrite(mt[3], 0);
      return "NOT";
      break;
    case YK04_Module::Button::A:
      digitalWrite(mt[0], 1);
      digitalWrite(mt[1], 0);
      digitalWrite(mt[2], 1);
      digitalWrite(mt[3], 0);
      return "A";
      break;
    case YK04_Module::Button::B:
      digitalWrite(mt[0], 0);
      digitalWrite(mt[1], 1);
      digitalWrite(mt[2], 1);
      digitalWrite(mt[3], 0);
      return "B";
      break;
    case YK04_Module::Button::C:
      digitalWrite(mt[0], 1);
      digitalWrite(mt[1], 0);
      digitalWrite(mt[2], 0);
      digitalWrite(mt[3], 1);
      return "C";
      break;
    case YK04_Module::Button::D:
      digitalWrite(mt[0], 0);
      digitalWrite(mt[1], 1);
      digitalWrite(mt[2], 0);
      digitalWrite(mt[3], 1);
      return "D";
      break;
    default:
      return "???";
  }
}