Using UNO and 2 RFID Readers

If so , post it using the "#" button.

If you had done that , it would look like this...

 #include <SoftwareSerial.h>

SoftwareSerial mySerial(2, 3); // RX, TX

void setup()  
{
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  // set the data rate for the SoftwareSerial port
  mySerial.begin(9600);
  mySerial.println("Hello, world?");
}

void loop() // run over and over
{
  byte readValue;
  
  if (mySerial.available()) {
    Serial.print("1=");
    delay(40);
    while (mySerial.available()) {
      readValue = mySerial.read();
      if (readValue>=9) {
        Serial.write(readValue);
      }
    }
  }

  if (Serial.available()) {
    Serial.print("2=");
    delay(40);
    while (Serial.available()) {
      readValue = Serial.read();
      if (readValue>=9) {
        Serial.write(readValue);
      }
    }
  }
  
}