diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 97433bfc..bad58f4a 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2422,7 +2422,8 @@ void sleep(float time) {  // sleeps for intervals more than 0.01 milli seconds
   unsigned long time_us = (unsigned long)(time * 1000000.0);	
   unsigned long startSleep = micros();	    
   while ((micros() - startSleep) < time_us)  {	  
-    busy_wait_us(100);	 
+//    busy_wait_us(100);
+    delayMicroseconds(100);
   }
 }