From a3be4cbb3cc3c4f2bf4f81e6685b44ced2cfc444 Mon Sep 17 00:00:00 2001
From: Stefan Ostermann <stefan@ostermail.de>
Date: Thu, 12 Oct 2023 23:19:58 +0200
Subject: [PATCH] RFID test

---
 src/main.cpp | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index e25f859..a9520ed 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -276,6 +276,52 @@ void readRFID()
   Serial.print("Tag UID: ");
   String uidString = getRFIDString(rfid.uid.uidByte);
   Serial.println(uidString);
+
+
+  // Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
+  MFRC522::MIFARE_Key key;
+  for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;
+
+  //some variables we need
+  byte buffer[42];  //data transfer buffer (16+2 bytes data+CRC)
+  byte size = sizeof(buffer);
+
+  uint8_t pageAddr = 0x05;  //In this example we will write/read 16 bytes (page 6,7,8 and 9).
+                            //Ultraligth mem = 16 pages. 4 bytes per page.  
+                            //Pages 0 to 4 are for special functions.  
+
+  MFRC522::StatusCode status;
+
+  rfid.PICC_DumpDetailsToSerial(&(rfid.uid));
+
+  //------------------------------------------- GET FIRST NAME
+  /*
+  status = rfid.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, 4, &key, &(rfid.uid)); //line 834 of MFRC522.cpp file
+  if (status != MFRC522::STATUS_OK) {
+    Serial.print(F("Authentication failed: "));
+    Serial.println(rfid.GetStatusCodeName(status));
+    return;
+  }
+
+  Serial.println("Auth");
+*/
+
+  // works only with mifare ultralight:
+  status = rfid.MIFARE_Read(pageAddr, buffer, &size);
+  if (status != MFRC522::STATUS_OK) {
+    Serial.print(F("Reading failed: "));
+    Serial.println(rfid.GetStatusCodeName(status));
+    return;
+  }
+
+  //Dump a byte array to Serial
+  for (byte i = 0; i < size; i++) {
+      Serial.write(buffer[i]);
+  }
+  Serial.println();
+  // ------------------------------
+  rfid.PICC_HaltA();
+
   playSongByRFID(uidString);
   lastInteraction = millis();
 }