diff --git a/feature/motheure-simple/source/loop.php b/feature/motheure-simple/source/loop.php
index 1b57bd8..baab23d 100644
--- a/feature/motheure-simple/source/loop.php
+++ b/feature/motheure-simple/source/loop.php
@@ -103,7 +103,9 @@
 		/* [2] Main loop
 		=========================================================*/
 		/* (1) Log action to default log file */
-		$f_data->fwrite( "[" . floor( $stop_ts - $start_ts ) ."]\n"  );
+		$elapsed = $stop_ts - $start_ts;
+		$elapsed = round($elapsed*1000) / 1000;
+		$f_data->fwrite( "[" . $elapsed ."]\n"  );
 		slog("Motor stop", 'motheure-simple:loop', 'motheure');
 
 		/* (2) Return status */