diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 35ddb6be..3da7db12 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -4002,9 +4002,10 @@ void transmit_cw(int freq, float duration) {  // freq in Hz, duration in millise
 */		
   if (wifi)	
     digitalWrite(LED_BUILTIN, HIGH);   // set the built-in LED ON
-  else
+  else {
     digitalWrite(led_builtin_pin, HIGH);   // set the built-in LED ON	
-	
+    Serial.printf("Turning on LED at pin: %d\n", led_builtin_pin);	  
+  }
   digitalWrite(MAIN_LED_BLUE, HIGH);	
 
   unsigned long duration_us = duration * 1000;