Menu type display in LCD using 4x4 Keypad in Arduino

Question

I am trying to display two menu type in 16x2 LCD display using keypad in Arduino.

Here is the code; `#include <Wire.h> #include <LiquidCrystal_I2C.h> #include <Keypad.h>

byte rowPins[4]={9,8,7,6};
byte colPins [4]={5,4,3,2};

char keys[4][4]={
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
Keypad keypad = Keypad(makeKeymap(keys),rowPins,colPins,4,4);

LiquidCrystal_I2C lcd(0x27,16,2);
boolean present = false;
boolean next = false;
boolean final = false;
String num1, num2; // 
float ans;//  
char op;// 

//String Line1 = "                ";
//String Line2 = "                ";
//char cursors = 0;
//
////phaseshift
//char phase_value[2];
//int phase_cursor;
//int phase_index;
//char phasesign;
//
////declare function
//void Phaseshift_Fn();
//void CV_Fn();
//void CC_Fn();
//void Remote_Fn();

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.begin (16,2);

  lcd.clear();
  lcd.setCursor(0, 0); lcd.print(Line1);
  lcd.setCursor(0, 1); lcd.print(Line2);
  delay(100);

  lcd.setCursor(5,0);
  lcd.print("HELLO");
  lcd.setCursor(0,1);
  lcd.print("PRESS FWD Button");
  delay(2000);
  lcd.clear();
  delay(1000); 
}

void loop() {
  char key = keypad.getKey();
  if(key == 'B'){
      lcd.setCursor(0,0);
      lcd.print("IF NO AIR BUBBLE");
      lcd.setCursor(0,1);
      lcd.print("PRESS STOP");
     }
    if(key == 'A'){
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("PRESS MODE");
      lcd.setCursor(0,1);

       switch(mode)
{
  case Startup:
    lcd.begin(16,2);
    lcd.clear();
    lcd.setCursor(0,0);
    Line1 = "Enter Amount";
    lcd.print(Line1);
    lcd.setCursor(0,1);
    Line2 = "Enter Time";
    lcd.print(Line2);
    delay(1000);
    mode = Mainmenu;
    break;



  
       }

   

    if (key != NO_KEY &&       (key=='1'||key=='2'||key=='3'||key=='4'||key=='5'||key=='6'||key=='7'||key=='8'||key=='9'||key=='0'))
  {
    if (present != true)
    {
      num1 = num1 + key; // storing the value of key pressed in num1
      float numLength = num1.length();
      lcd.setCursor(0, 1); /* decaling the place where the first entry will be displayed*/
      lcd.print(num1); // printing the first number entered
    }
    else
    {
      num2 = num2 + key;//storing the value of second key pressed in num2
      float numLength = num2.length();
      lcd.setCursor(4, 1);/*decaling the place where the second entry will be displayed*/
      lcd.print(num2); //printing the second number entered
      final = true;
        }
  }

}`

As a beginner of the Arduino programming I tried so many methods including switch methods also. But it didn't display. Please anyone can help me to solve this code?

I am trying to display this;enter image description here

Here I want to display when I click the S button there two menus are displaying. They are Stop and Start. I want to display that two in LCD and if start button click then machine is forward after that when I click the stop button it should be stopped.

Menu type display in LCD using 4x4 Keypad in Arduino

0 Answers0