light error lamp when not ready

main.c

@@ -107,6 +107,8 @@ int main()
 
     printf("moin!\n\r");
 
+    set_Output(LED_FEHLER, ON);
+
     timer3_init(); //abzug
     timer4_init(); //taenzer
     timer5_init(); //spule
@@ -163,6 +165,8 @@ int main()
     uint32_t timer_send_info = millis();
     uint32_t timer_modbus_poll = millis();
 
+    set_Output(LED_FEHLER, OFF);
+
     while(1)
     {
         wdt_reset(); // WDT reset at least every sec