i just got a sample code for serial communication from the link referred by the contributor JAN SIMON but the problem is i need to press a button to receive the data from another PC can any one tell which logic can be used to receive data from the terminal of other PC
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There is no special logic for this case. If you are using 9600 or faster then using hardware flow control is recommended.
If the two PCs are connected directly together then you need a "null modem cable".