ATMega 328p : Analog Voltage to Serial

logic.ino

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    ;
  }

  mySerial.begin(9600);
}

void loop() {
    int sensorValue = analogRead(A5);
    float voltage = sensorValue * (5.0 / 1023.0);
    int data = voltage * 100;
    String res = String(data);
    
    Serial.println(res);
      mySerial.println(res);

    delay(1000); 
}