From 5814a73f50ecd5d53098b9724fff588c15017bab Mon Sep 17 00:00:00 2001
From: Stefan Ostermann <stefan@ostermail.de>
Date: Sat, 2 Dec 2023 17:04:46 +0100
Subject: [PATCH] only accept new rfid id

---
 src/main.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 0b861ec..4e7a2fc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -376,9 +376,16 @@ void IRAM_ATTR rfid_interrupt()
 void readRFID()
 {
   rfid.PICC_ReadCardSerial();
+  
+  String newUid = getRFIDString(rfid.uid.uidByte);
+  if (newUid==lastUid) {
+    return;
+  }
+  lastUid = newUid;
+
   Serial.print("Card UID: ");
-  lastUid = getRFIDString(rfid.uid.uidByte);
   Serial.println(lastUid);
+
   //rfid.PICC_DumpDetailsToSerial(&(rfid.uid));