const int vertical=A0;
const int horizontal=A3;

void setup() {
  // put your setup code here, to run once:
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {
  // put your main code here, to run repeatedly:
  int adc_v,adc_h;
  float v_volt,h_volt;
  adc_v=analogRead(vertical);
  adc_h=analogRead(horizontal);
  v_volt=(( adc_v * 3.3 ) / 4095);
  h_volt=(( adc_h * 3.3 ) / 4095);
  Serial.print("v_volt= ");
  Serial.print(v_volt);
  Serial.print(" h_volt= ");
  Serial.println(h_volt);
  digitalWrite(2,v_volt);
  digitalWrite(4,h_volt);
  delay(1000); // this speeds up the simulation
}