#include <SoftwareSerial.h>
int hall=A2;

SoftwareSerial mySerial(0, 1);
void setup() {
  // put your setup code here, to run once:
mySerial.begin(9600);
pinMode (hall,INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int lectura=analogRead(hall);
  float outputV = lectura * 5.0 / 1023;
  mySerial.println(outputV);
  delay(100);

}