the reason is, that is only copied and isn't understand for what i've doing this!
see at BEN's Hobby Corner:
http://members.home.nl/bzijlstra/software/examples/wiz610wi.htm
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The connection of the WIZ610wi is not done on a real hardware UART of the Atmega168. The FT232RL USB connector is fitted there to program the Arduino from the outside world. So a soft-UART must be used. SIX1 has seen that Olimex used INT0 and INT1 pins for RX and TX between microcontroller and WIZ610wi module so the serial communication between the Arduino and the shield could be done on interrupt base. Very clever!!
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