transmit LED on/off for CW ID

cubesatsim/cubesatsim.ino

@@ -3575,6 +3575,10 @@ void configure_wifi() {
 }
 
 void transmit_cw(int freq, float duration) {  // freq in Hz, duration in milliseconds
+  if (!wifi) 
+    digitalWrite(LED_BUILTIN, HIGH);	// Transmit LED on
+  digitalWrite(MAIN_LED_BLUE, HIGH);	
+	
   unsigned long start = micros();
   unsigned long duration_us = duration * 1000;
   float period_us = (0.5E6) / (float)(freq);
@@ -3586,6 +3590,9 @@ void transmit_cw(int freq, float duration) {  // freq in Hz, duration in millise
     sleep(min(time_left, period_us) / 1.0E6);  
   }
   digitalWrite(AUDIO_OUT_PIN, LOW);	
+  if (!wifi) 
+    digitalWrite(LED_BUILTIN, LOW);	// Transmit LED off
+  digitalWrite(MAIN_LED_BLUE, LOW);	
 }
 
 void transmit_callsign(char *callsign) {