const int seg_a = 19;
const int seg_b = 18;
const int seg_c = 5;
const int seg_d = 17;
const int seg_e = 16;
const int seg_f = 4;
const int seg_g = 0;
const int on_button = 12;
const int off_button = 14;

int counter=0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(on_button, INPUT_PULLUP);
  pinMode(off_button, INPUT_PULLUP);
  pinMode(seg_a, OUTPUT);
  pinMode(seg_b, OUTPUT);
  pinMode(seg_c, OUTPUT);
  pinMode(seg_d, OUTPUT);
  pinMode(seg_e, OUTPUT);
  pinMode(seg_f, OUTPUT);
  pinMode(seg_g, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

  if(counter>9)
  {
    counter=0;
  }
  if(counter<1)
  {
    counter=0;
  }
  if (digitalRead(on_button) == 0) {
    print_number(counter++);
  }
  if (digitalRead(off_button) == 0) {
    print_number(--counter);
  }
  delay(1000);
}

void print_number (int num)
{
  switch (num) {
    case 1:
      all_off();
      digitalWrite(seg_a, LOW);
      digitalWrite(seg_b, HIGH);
      digitalWrite(seg_c, HIGH);
      digitalWrite(seg_d, LOW);
      digitalWrite(seg_e, LOW);
      digitalWrite(seg_f, LOW);
      digitalWrite(seg_g, LOW);
      break;
    case 2:
      all_off();
      digitalWrite(seg_a, HIGH);
      digitalWrite(seg_b, HIGH);
      digitalWrite(seg_c, LOW);
      digitalWrite(seg_d, HIGH);
      digitalWrite(seg_e, HIGH);
      digitalWrite(seg_f, LOW);
      digitalWrite(seg_g, HIGH);
      break;
    case 3:
      all_off();
      digitalWrite(seg_a, HIGH);
      digitalWrite(seg_b, HIGH);
      digitalWrite(seg_c, HIGH);
      digitalWrite(seg_d, HIGH);
      digitalWrite(seg_e, LOW);
      digitalWrite(seg_f, LOW);
      digitalWrite(seg_g, HIGH);
      break;
    case 4:
      all_off();
      digitalWrite(seg_a, LOW);
      digitalWrite(seg_b, HIGH);
      digitalWrite(seg_c, HIGH);
      digitalWrite(seg_d, LOW);
      digitalWrite(seg_e, LOW);
      digitalWrite(seg_f, HIGH);
      digitalWrite(seg_g, HIGH);
      break;
    case 5:
      all_off();
      digitalWrite(seg_a, HIGH);
      digitalWrite(seg_b, LOW);
      digitalWrite(seg_c, HIGH);
      digitalWrite(seg_d, HIGH);
      digitalWrite(seg_e, LOW);
      digitalWrite(seg_f, HIGH);
      digitalWrite(seg_g, HIGH);
      break;
    case 6:
      all_off();
      digitalWrite(seg_a, HIGH);
      digitalWrite(seg_b, LOW);
      digitalWrite(seg_c, HIGH);
      digitalWrite(seg_d, HIGH);
      digitalWrite(seg_e, HIGH);
      digitalWrite(seg_f, HIGH);
      digitalWrite(seg_g, HIGH);
      break;
    case 7:
      all_off();
      digitalWrite(seg_a, HIGH);
      digitalWrite(seg_b, HIGH);
      digitalWrite(seg_c, HIGH);
      digitalWrite(seg_d, LOW);
      digitalWrite(seg_e, LOW);
      digitalWrite(seg_f, LOW);
      digitalWrite(seg_g, LOW);
      break;
    case 8:
      all_off();
      digitalWrite(seg_a, HIGH);
      digitalWrite(seg_b, HIGH);
      digitalWrite(seg_c, HIGH);
      digitalWrite(seg_d, HIGH);
      digitalWrite(seg_e, HIGH);
      digitalWrite(seg_f, HIGH);
      digitalWrite(seg_g, HIGH);
      break;
    case 9:
      all_off();
      digitalWrite(seg_a, HIGH);
      digitalWrite(seg_b, HIGH);
      digitalWrite(seg_c, HIGH);
      digitalWrite(seg_d, HIGH);
      digitalWrite(seg_e, LOW);
      digitalWrite(seg_f, HIGH);
      digitalWrite(seg_g, HIGH);
      break;
  }
}


void all_off()
{
  digitalWrite(seg_a, LOW);
  digitalWrite(seg_b, LOW);
  digitalWrite(seg_c, LOW);
  digitalWrite(seg_d, LOW);
  digitalWrite(seg_e, LOW);
  digitalWrite(seg_f, LOW);
  digitalWrite(seg_g, LOW);
}