#include <SoftwareSerial.h> //ปุ่ม+lcd
#include <Bonezegei_LCD1602_I2C.h>
Bonezegei_LCD1602_I2C lcd(0x3f);

const int buttonPinsUNO1[4] = {2, 3, 4, 5}; 
SoftwareSerial mySerial(10, 11); // rx, tx

void setup() {
  Serial.begin(115200);
  for (int i = 0; i < 4; i++) {
    pinMode(buttonPinsUNO1[i], INPUT_PULLUP);
  }
  mySerial.begin(115200);
  lcd.begin();
}

void loop() {
//////////////////////////////////////////////////////////////////////// ปุ่มที่ arduino1 ส่งสัญญาไปที่LED arduino2
  for (int i = 0; i < 4; i++) {
    int buttonState = digitalRead(buttonPinsUNO1[i]);
    if (buttonState == HIGH) {
      mySerial.write('1');
    } else {
      mySerial.write('0');
    }
  }
  delay(500);
//////////////////////////////////////////////////////////////////////// LCD รับข้อมูลที่ส่งมาจาก arduino2
  if (mySerial.available() >= 4) {
    lcd.clear(); 
    for (int i = 0; i < 4; i++) {
      char buttonState = mySerial.read();  
      if (buttonState == '0') {  
        switch (i) {
          case 0:
            lcd.setPosition(0, 0);
            lcd.print("Button 1 Green");
            break;
          case 1:
            lcd.setPosition(0, 0);
            lcd.print("Button 2 Blue");
            break;
          case 2:
            lcd.setPosition(0, 0);
            lcd.print("Button 3 Yellow");
            break;
          case 3:
            lcd.setPosition(0, 0);
            lcd.print("Button 4 Red");
            break;
        }
      }
    }
  }
  delay(500);
}