diff --git a/Central_Control_Board/readme.txt b/Central_Control_Board/readme.txt
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+main code: Central_Main, Excute file: central.
+you should connect by socket communication in order of (0: Sensing Board, 1: Operation Board, 2: WeatherAPI)
+please excute 1)this board - central  ==> 2) Sensing Board - main ==> 3) operation board - actuabor
+ ==> 4)this board - WeatherAPI - whe
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