#include <SoftwareSerial.h>SoftwareSerial mySerial(8,9); // (RX,TX)void setup() {
Serial.begin(9600);
mySerial.begin(9600); Serial.setTimeout(50);
mySerial.setTimeout(50);
}void loop() {
if(Serial.available()){
String str = Serial.readString();
mySerial.println(str);
}
if(mySerial.available()){
String str = mySerial.readString();
Serial.println(str);
}
}