diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 65e5ddf2..40c14815 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -3528,7 +3528,7 @@ void start_isr() {
 	
 //  if (ITimer0.attachInterruptInterval(833, TimerHandler0))	
 //  if (ITimer0.attachInterruptInterval(804, TimerHandler0))	
-    if (ITimer0.attachInterruptInterval(100, TimerHandler0))	// was 800 // was was 828 (841) and 828
+    if (ITimer0.attachInterruptInterval(400, TimerHandler0))	// was 800 // was was 828 (841) and 828
 //  if (ITimer0.attachInterruptInterval(1667, TimerHandler0))
     {
       if (debug_mode)