發送短信

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 ______    _    _                ___      _____   
|      \\ | || | ||   ____      / _ \\   /  ___|| 
|  --  // | || | ||  |    \\   | / \ || | // __   
|  --  \\ | \\_/ ||  | [] ||   | \_/ || | \\_\ || 
|______//  \____//   |  __//    \___//   \____//  
`------`    `---`    |_|`-`     `---`     `---`   
                     `-`

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發送短信 : WiFi based device-free human activity recognition