Hello SR.Ramasubramanian, Aha, now I've got it. So want to replace PC talking via RS232 to PIC with another PIC-based device. You will need some driver to meet RS232 signal condition (something like MAX232) and PIC with UART or even without UART - use code from Microchip's AN. SR> Actually I am using a PC to communicate with pic to get some data from it. SR> For getting those data, I need to send some string of characters (for SR> getting particular information) say for example version of firmware and some SR> of the parameters like voltage if pic is measuring, frequency. SR> How this can be done ?. By doing this I can eliminate the use of PC there. -- Best regards, Oleg mailto: remove_this_word.sergin@fcita.dn.ua