diff --git a/lib/mfrc522/source/loop.php b/lib/mfrc522/source/loop.php
index a959eb2..c85a30a 100755
--- a/lib/mfrc522/source/loop.php
+++ b/lib/mfrc522/source/loop.php
@@ -338,10 +338,13 @@
 
 		/* [1] Wait for rfid card
 		=========================================================*/
-		/* (1) Read card */
+		/* (1) Start timer */
+		$start_ts = microtime(true);
+
+		/* (2) Read card */
 		$code = syscall(SOURCE_DIR.'/lib/mfrc522/read');
 		
-		/* (2) If no card read -> reset @last_user / @timeout + abort */
+		/* (3) If no card read -> reset @last_user / @timeout + abort */
 		if( $code === false ){
 
 			$last_user = null;
@@ -350,8 +353,18 @@
 
 		}
 
+		/* (4) If timeout exceeded -> reset @timeout and @last_user */
+		if( microtime(true) - $start_ts >= 0.5 ){
+			$timeout   = 0;
+			$last_user = null;
+		}
 
-		/* (3) If code -> format it */
+		/* (5) Wait for 1/2 second */
+		while( microtime(true) - $start_ts < 0.5 );
+
+
+
+		/* (6) If code -> format it */
 		$code = strtoupper($code);
 
 		slog("card '$code' read", 'mfrc522:read');
@@ -447,7 +460,6 @@
 
 		mfrc522_loop();
 
-		while( microtime(true) - $start_ts < 0.5 );
 	
 	}
 ?>