L9637d is not reading

Projects General Guidance
6

I am using this code for arduino

#include <SoftwareSerial.h>

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

void setup() {
  Serial.begin(9600);

  while (!Serial)
    mySerial.begin(10400);
}

void loop()
{
  if (mySerial.available())
    Serial.println(mySerial.read());
}