Hey dmharduino
You are missing Serial.print("DATA,"); just above
Serial.print(clear);
Serial.print(",");
Serial.print(red);
Serial.print(",");
Serial.print(green);
Serial.print(",");
Serial.print(blue);
You should also remove this line Serial.println(); and instead changeyour last Serial.print(blue); in
Serial.println(blue);
The Serial.print("DATA,") is necessary for Excel to know what to do.