Problems reading FDX-B Tags using RFID Reader

Other Hardware Sensors
1

Hello!
I'm bulding a system using an Arduino UNO to read the identification code and temperature in the tags "Biotherm 13 Pit Tag". The RFID Reader I have is this one.

Using the following code I was already able to read the identification code of 15 characters, but the tags are also supposed to send additional information related to the temperature.

#include <SoftwareSerial.h>

const byte rxPin = 4;
const byte txPin = 5;
char c;
String code = "";

SoftwareSerial RFID(rxPin, txPin); //rx, tx

void setup() {
  Serial.begin(9600);
  RFID.begin(9600);
  Serial.println("Communication has started");
}

void loop() {
  if (RFID.available() > 0) {
    
    c = RFID.read();

    //Last characters were reached
    if (c == '\r') {
      Serial.print("\n");
      Serial.println("Code: " + code);
      Serial.println("Tag Detected: " + returnTagName(code));
    }
    
    //The code ends with a \n
    else if (c == '\n')
      code = "";
      
    //Add the new character to the code
    else {
      code = code + c;
    }
  }
}

//Returns the name of the tag
String returnTagName(String code) {
  if (code == "989001025046146") {
    return "Tag 1";
  }
  else if (code == "989001025046156") {
    return "Tag 2";
  }
  else if (code == "989001025045056") {
    return "Tag 3";
  }
  else {
    return "Unknown Tag";
  }
}

For example, if I use a PIT Reader from Biotherm, like this one the temperature is read.

So my question is why isn't the temperature information being read in the Arduino. Do I need a different RFID Reader?

The information that is printed in the Serial Monitor can be seen in the image below.

Serial Monitor
Serial Monitor997×436 10.2 KB

2

According to the description of the product I would expect the tag to be compatible with ISO 11784/5 but only the tag part. The temperature sensor seems to be a proprietary extension that needs one of the readers explicitly listed there.

3

Hmm, it's possible.
What I think is weird is that in the datasheet of other RFID readers, like this one it says in the bottom of page 8 that extra information of tags following the FDX-B can be read using certain commands. So, I was expecting that maybe there was a way to receive information about the temperature.