Real Time Clock (RTC) using One DS1307, Two LCD display with USART communication by Two Micro-Controller (PIC16f877A). Additional 4 push buttons to set both time and calender. USART only transmit Time, so that the second LCD shows Time but fast LCD shows both Time and Date.
Here also connected with two virtual terminal, 1st one is for Transmitter (Tx) and 2nd one is for Receiver (Rx).
C Code in the Micro-Controller – PIC16F877A