Hi there I_Kill_Horses, Welcome to the forum. You are quite right about the void loop. You can find my working solution in the body of this thread somewhere or in the opening post of the thread linked in my signature below. My project is in bits at the moment, so I can't test this, but maybe try this to fix your blank problem: printNumLED(0, (long)(VData.AP/1000),0) if I'm wrong one of the skilled folks should be along to correct it Also, I think I might steal er.... borrow your idea re: the radar height cutoff;)