@richland007 I have modified the code before update it, to make it simpler and probably something is wrong.
I use 2 tags, the first to recognize me (S) and the second to recognize my wife (G)
for serial communication, later I send you a photo

I have bought this on Amazon:
AZDelivery ⭐⭐⭐⭐⭐ Kit RFID RC522 13,56MHz con Reader, Chip e Scheda per Arduino e Raspberry Pi con eBook Gratuito!
7€

I have connected Arduino with PI via USb cable
with this connection I upload sketch to Aruino (this is why I use Arduino IDE on PI) and with the same connection datas (RFID tags) are tranfered from Arduino to PI (and the module of magic Mirror does the rest of the job)

thanks, I tried MMM-Parcel but I am searching a service to connect directly to my amazon account, like MY ORDERS

this program sends via serial communication the value “S” if i use TAG1 and “G” if I usa TAG2
Then you have to use, on magic mirror, the module MMM-Serial-Notifications to read the value:

{
    module: 'MMM-Serial-Notifications',
    config: {
      devices: {
        '/dev/ttyACM0': {
          messages: {
            'S': [
              {
		notification: 'CURRENT_PROFILE', 										
		payload:  'S',
              },
            ],
          'A': [
              {
		notification: 'CURRENT_PROFILE', 										
		payload:  'G',
              }

            ]
          }
        }
      }
    }
  },

and the module MMM-ProfileSwitcher to manage all other modules:

{
        		module: 'MMM-ProfileSwitcher',
			classes: 'default',
			header: "Profile",
        		config: {
		
				enterMessages: {
					"G": "Ciao, G",
					"S": "Ciao, S" 
				},
				leaveMessages: {
					"G": "Ciao G, ci vediamo alla prossima", 
					"S": "Ciao S, ci vediamo alla prossima",
				},

				timers: {
    				"S": {
        			time: 10 * 1000
    				},
    				"G": {
        			time: 10 * 1000
    				}
			}

		
		
  		      }
    		},

BYE
Stefano

----------------------------------------------------
#include <SPI.h>
#include <RFID.h>

#define SDA_DIO 10  // 53 per Mega
#define RESET_DIO 9
#define delayRead 1000 // Time of delay 
#define delayLed 2000 
#define ledVerde 3
#define ledRosso 4
RFID RC522(SDA_DIO, RESET_DIO); 
 
String TAG1= "975318736";
String TAG2= "976A15D37";
 
void setup()
{ 
  Serial.begin(9600);
  /* Abilita SPI*/
  SPI.begin(); 
  /* Viene inizilizzato RFID reader */
  RC522.init();
  /*Serial.println("Setup");*/
  pinMode(ledVerde,OUTPUT);
  pinMode(ledRosso,OUTPUT);
}
 
void loop()
{
  /* Temporary loop counter */
  byte i;
  // Se viene letta una tessera
  if (RC522.isCard())
  {
    RC522.readCardSerial();
    String codiceLetto ="";
    for(i = 0; i <= 4; i++)
    {
      codiceLetto+= String (RC522.serNum[i],HEX);
      codiceLetto.toUpperCase();
    }
     if (codiceLetto.equals(TAG1)){
      Serial.println("S");
      accendiLed(ledVerde);
    }
    if (codiceLetto.equals(TAG2)){
      Serial.println("G");
      accendiLed(ledVerde)
    delay(delayRead);  
  }
 }

boolean verificaCodice(String codiceLetto){
  if(codiceLetto.equals(codiceAutorizzato)){
    return true;
  }else{
    return false;
  }  
}    
void accendiLed(int ledPin){
  digitalWrite(ledPin,HIGH);
  delay(delayLed);
  digitalWrite(ledPin,LOW);
}
----------------------------------------------------

I have done in this way.

I Have installed Arduino IDE on RPI and to run on Arduino the program to send via serial communication ten information of the RFID it’s reading
This in the programo uploaded on Arduino
I use two RFID tags (TAG1 and TAG2)

Hello
is it possible to manage amazon notifications (online purchases) on the magic mirror?