#include <GyverOLED.h>
GyverOLED<SSD1306_128x64, OLED_BUFFER> oled;

String num = "87023754460";
String carrier = "Activ";

void setup() {
  oled.init();
 pinMode(A1, INPUT_PULLUP);
 pinMode(A2, INPUT_PULLUP);
}

int mode = 2;

void precall() {
oled.clear();
oled.setScale(2);
oled.setCursor(0, 2);
oled.print(num);

oled.setScale(1);
oled.setCursor(40, 0);
oled.print(carrier);
oled.setCursor(2, 6);
oled.print("вызов");
oled.setCursor(83, 6);
oled.print("удалить");
oled.update();
}

void call(){
  oled.clear();
  oled.setScale(1);
  
oled.setCursor(30, 2);
oled.print("Вызов...");
oled.setCursor(25, 4);
oled.print(num);
oled.setCursor(40, 0);
oled.print(carrier);

  oled.update();
}

void remove(){
int indexx = num.length();
num.remove(indexx-1);
if(indexx == 1){
  mainm();
}
}

void mainm(){
oled.clear();
oled.setScale(2);
oled.setCursor(32, 0);
oled.print(carrier);
oled.update(); 
}

bool pressed = false;


void loop(){
if (num == ""){
mainm();
}
else{
switch(mode){
  case 0:
    remove();
    mode = 2;
    delay(200);
  break;
  case 1:
  call();break;
  case 2:
  precall();break;
}}

if(digitalRead(A1) == 0 and mode == 2 and pressed == false){
mode = 1;
pressed = true;
}
if(digitalRead(A1) == 1 and pressed == true){
  pressed = false;
}
if(digitalRead(A2) == 0 and mode == 2 and pressed == false){
mode = 0;  
}
if(digitalRead(A2) == 1 and pressed == true){
  pressed = false;
}
}