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Thank you for your understanding.
hi friends, iam trying to write keypad programm using interrupt method and send the pressed key to terminal. but iam not getting the char everytime.
And what do you expect anyone to deduce from that?
There is a fault in your keypad input and/or your serial output and/or whatever you have between them!
What "terminal" are you talking about? there could possibly even be a fault with that...