arduino project

// include the library code:
#include <Wire.h>
#include <ezButton.h>
#include "Waveshare_LCD1602_RGB.h"

// variable red, green, blue for LCD (can change)
int r, g, b;


// State of LCD
// if isOn = true, it mean the LCD is ON
// if isOn = false, it mean the LCD is OFF
bool isOn = true;

// define LCD from the library, 16 columns and 2 rows
Waveshare_LCD1602_RGB lcd(16, 2);

// create ezButton object that attach to pin
ezButton button1(6);
ezButton button2(7);
ezButton button3(8);
ezButton button4(5);
ezButton button5(4);
ezButton button6(3);

// setup function
void setup() {

  // set debounce time to 50 milliseconds,
  button1.setDebounceTime(50);
  button2.setDebounceTime(50);
  button3.setDebounceTime(50);
  button4.setDebounceTime(50);
  button5.setDebounceTime(50);
  button6.setDebounceTime(50);

  // initializes the display
  lcd.init();

  // call LCD welcomeScreen() function
  welcomeScreen();

}
void loop() {

  // MUST call the button loop() function first
  button1.loop();
  button2.loop();
  button3.loop();
  button4.loop();
  button5.loop();
  button6.loop();

  //-----button excute------

  // If the LCD is ON then it will work following program:
  if (isOn == true) {

    // If button 1 is press then it will call function happy()
    if (button1.isPressed()) {
      happy();
      delay(75);
    }

    // If button 2 is press then it will call function sad()
    else if (button2.isPressed()) {
      sad();
      delay(75);
    }

    // If button 3 is press then it will call function confused()
    else if (button3.isPressed()) {
      confused();
      delay(75);
    }

    // If button 4 is press then it will call function angry()
    else if (button4.isPressed()) {
      angry();
      delay(75);
    }

    // If button 5 is press then it will call function nervous()
    else if (button5.isPressed()) {
      nervous();
      delay(75);
    }

    // If button 6 is press then it will
    // turn off the LCD screen.
    else if (button6.isPressed()) {
      lcd.clear();
      lcd.setRGB(0, 0, 0);
      isOn = false;
    }

  }

  // If the LCD is OFF and user press
  // BUTTON 6 then it will turn ON the LCD
  // and call function welcomeScreen()
  else if (button6.isPressed()) {
    if (isOn == false) {
      lcd.clear();
      welcomeScreen();
      isOn = true;
      delay(200);
    }

  }

}

// create welcome screen function
void welcomeScreen() {
  // change rgb for LCD text
  r = 255;
  g = 255;
  b = 255;

  // send text to LCD
  lcd.setRGB(r, g, b);
  lcd.setCursor(0, 0);
  lcd.send_string("Power On!");
  lcd.setCursor(0, 1);
  lcd.send_string("Emotions Present");
}

// ====== emoji function =======

// create sad function
void sad() {
  // change rgb for LCD text to blue
  r = 112;
  g = 150;
  b = 255;

  // send text to LCD
  lcd.clear();
  lcd.setRGB(r, g, b);
  lcd.setCursor(0, 1);
  lcd.send_string("I'm sad");
  lcd.setCursor(12, 0);
  lcd.send_string("T_T");
}

// create happy function
void happy() {
  // change rgb for LCD text yellow
  r = 221;
  g = 255;
  b = 0;

  // send text to LCD
  lcd.clear();
  lcd.setCursor(0, 1);
  lcd.send_string("I'm happy");
  lcd.setCursor(12, 0);
  lcd.setRGB(r, g, b);
  lcd.send_string("^_^");
}

// create confused function
void confused() {
  // change rgb for LCD text to green
  r = 0;
  g = 255;
  b = 0;

  //send text to LCD
  lcd.clear();
  lcd.setCursor(0, 1);
  lcd.send_string("I'm confused");
  lcd.setCursor(12, 0);
  lcd.setRGB(r, g, b);
  lcd.send_string("@_@");
}

// create nervous function
void nervous() {
  // change rgb for LCD text to white
  r = 255;
  g = 255;
  b = 255;

  // send text to LCD
  lcd.clear();
  lcd.setCursor(0, 1);
  lcd.send_string("I'm nervous");
  lcd.setCursor(12, 0);
  lcd.setRGB(r, g, b);
  lcd.send_string(">_<");
}

// create angry function
void angry() {
  // change rgb for LCD text to red
  r = 255;
  g = 0;
  b = 0;

  // create uint8_t array/list for custom character.
  // Each LCD block (there are 32 blocks total
  // from 2x16) have 40 pixels (8x4)

  /*
   NOTE* (how to create custom
   character for Waveshare library)

   To convert pixel to binary,
   if pixel is ON then binary = 1,
   if pixel is OFF then binary = 0,
   each row have 5 columns.
   so it is ##### with # is 1 or 0.
   Convert binary to Hex.
   [!] Hexadecimal, requiring the prefix 0x or 0X.
   */

  uint8_t angry1[] = {
    0x04,
    0x02,
    0x03,
    0x03,
    0x00,
    0x00,
    0x01,
    0x02
  };
  uint8_t angry2[] = {
    0x00,
    0x00,
    0x00,
    0x00,
    0x00,
    0x1F,
    0x00,
    0x00
  };
  uint8_t angry3[] = {
    0x04,
    0x08,
    0x18,
    0x18,
    0x00,
    0x00,
    0x10,
    0x08
  };

  // create custom characters, maximum is 7
  // characters(1-7, with Hex prefix)
  lcd.customSymbol(0x01, angry1);
  lcd.customSymbol(0x02, angry2);
  lcd.customSymbol(0x03, angry3);

  // send text to LCD
  lcd.setRGB(r, g, b);
  lcd.clear();
  lcd.setCursor(0, 1);
  lcd.send_string("I'm angry");
  lcd.setCursor(12, 0);
  lcd.write_char(0x01);
  lcd.write_char(0x02);
  lcd.write_char(0x03);
}