Hello, in my project work I want to read serially received data continuously and compare it with stored ID in MCU I am using 8051. If the ID match then Green LED will glow, for ID mismatch Orange LED. If no ID found Red LED should glow. In this I am getting problem,when valid Id received it is indicated by Green LED but if we stop sending ID i.e. logically NO DATA in SBUF the Red LED should glow ; it doesn't happen its showing Green Led on...how to solve this one?