diff --git a/src/modules/illumination/illumination.cpp b/src/modules/illumination/illumination.cpp
index aa54eba..83014f8 100644
--- a/src/modules/illumination/illumination.cpp
+++ b/src/modules/illumination/illumination.cpp
@@ -98,13 +98,13 @@ void cc_test()
     for (float v = 0; v <= 1; v+=0.02)
     {
 
-        Serial.print(v);
-        Serial.print(" ");
+        comPort->print(v);
+        comPort->print(" ");
         cc_set_value(v);
-        Serial.print(" ");
+        comPort->print(" ");
         delay(2000);
         float current = multi_read(A0, 1000)/4095.0*3.3;
-        Serial.println(current*1000);
+        comPort->println(current*1000);
     }
 
     cc_set_value(0);
@@ -156,7 +156,7 @@ void cc_set_value(float val)
             stepd = tdown;
         }
 
-        //step up
+        //step current
         uint8_t steps_done =0;
         for (uint8_t i=16; i!=setting; i+=dir)
         {
@@ -166,7 +166,6 @@ void cc_set_value(float val)
             delayMicroseconds(td);
             steps_done++;
         }
-        Serial.print(steps_done);
     #else
         comPort->println("CC LED not supported");
     #endif