int readVal;
float V2;
int wait=500;
int myvoltpin=A2;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
readVal=analogRead(myvoltpin);
V2=(5./1023.)*readVal;
Serial.println(V2);
delay(wait);
}