diff --git a/feature/rfid-read/source/loop.php b/feature/rfid-read/source/loop.php
index 4ef0528..a807331 100755
--- a/feature/rfid-read/source/loop.php
+++ b/feature/rfid-read/source/loop.php
@@ -15,6 +15,7 @@
 
 	$FEATURE = basename(dirname(__DIR__));
 
+	$LOOP_FREQ = 100; // reading frequency in ms
 
 
 
@@ -53,7 +54,7 @@
 	*
 	* @code<string>							Some RFID code
 	*
-	* @return user<array>						User info if found ; else NULL
+	* @return user<array>					User info if found ; else NULL
 	*
 	*/
 	function auth($code){
@@ -121,14 +122,16 @@
 			return false;
 
 
+		$cur_timeout = floor(microtime(true) - $timeout);
+
 		/* [2] Manage timeout
 		=========================================================*/
-		/* (1) If no action for this @timeout -> reset to 0 */
-		if( !isset($actions[$timeout]) || !is_array($actions[$timeout]) )
-			$timeout = 0;
+		/* (1) If no action for this @cur_timeout -> reset to 0 */
+		if( !isset($actions[$cur_timeout]) || !is_array($actions[$cur_timeout]) )
+			return false;
 
-		/* (2) fetch actions for the current @timeout */
-		$actionlist = $actions[$timeout];
+		/* (2) fetch actions for the current @cur_timeout */
+		$actionlist = $actions[floor($cur_timeout)];
 
 
 		/* [3] Manage permissions (action that can be performed)
@@ -221,7 +224,6 @@
 			slog('cannot update STATE file', 'rfid-read:loop');
 
 
-
 		/* [6] Log action
 		=========================================================*/
 		/* (1) Log action to default log file */
@@ -270,6 +272,7 @@
 		/* (2) Append accesses (logs) */
 		if( !file_exists(DATA_DIR."/$FEATURE") )
 			file_put_contents(DATA_DIR."/$FEATURE", '');
+
 		$f_accesslog = new SplFileObject(DATA_DIR."/$FEATURE", 'a');
 
 
@@ -351,13 +354,10 @@
 
 		/* [1] Wait for rfid card
 		=========================================================*/
-		/* (1) Start timer */
-		$start_ts = microtime(true);
-
-		/* (2) Read card */
+		/* (1) Read card */
 		$code = syscall(SOURCE_DIR."/feature/$FEATURE/read");
 
-		/* (3) If no card read -> reset @last_user / @timeout + abort */
+		/* (2) If no card read -> reset @last_user / @timeout + abort */
 		if( $code === false ){
 
 			$last_user = null;
@@ -366,34 +366,21 @@
 
 		}
 
-		/* (4) If timeout exceeded -> reset @timeout and @last_user */
-		if( microtime(true) - $start_ts >= 0.5 ){
-			$timeout   = 0;
-			$last_user = null;
-		}
-
-		/* (5) Wait for 1/2 second */
-		while( microtime(true) - $start_ts < 0.5 );
-
-
-
-		/* (6) If code -> format it */
+		/* (3) If code -> format it */
 		$code = strtoupper($code);
 
 		slog("card '$code' read", 'rfid-read:read');
 
 
-
 		/* [2] Check for user in auth list
 		=========================================================*/
 		/* (1) Check user for this code */
 		$user = auth($code);
 
-
 		/* (2) If not found -> reset @last_user / @timeout + abort */
 		if( is_null($user) ){
 
-			slog("Unknown user (not authenticated)", "rfid-read:loop");
+			slog("Unknown user", "rfid-read:loop");
 			$last_user = null;
 			$timeout   = 0;
 			return false;
@@ -403,13 +390,10 @@
 
 		/* [3] Manage @timeout incrementation + @last_user
 		=========================================================*/
-		/* (1) If same as last -> increment @timeout */
-		if( $last_user == $user['id'] )
-			$timeout++;
+		/* (1) If new user or different one -> Set timeout to current time */
+		if( $last_user != $user['id'] )
+			$timeout = microtime(true);
 
-		/* (2) If different -> reset @timeout to 0 */
-		else
-			$timeout = 0;
 
 
 		/* [4] Manage action
@@ -469,10 +453,15 @@
 	=========================================================*/
 	while( true ){
 
-		$start_ts = microtime(true);
+		/* (1) Store time */
+		$loop_ts = microtime(true);
 
+		/* (2) Execute loop code */
 		mfrc522_loop();
 
+		/* (3) Wait for @LOOP_FREQ seconds */
+		while( microtime(true) - $loop_ts < ($LOOP_FREQ/1000) );
+
 
 	}
 ?>