發送短信

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  ______    ______   __   __   _    _     _____   
 /_   _//  /_   _//  \ \\/ // | || | ||  / ____|| 
   | ||     -| ||-    \   //  | || | || / //---`' 
  _| ||     _| ||_    / . \\  | \\_/ || \ \\___   
 /__//     /_____//  /_//\_\\  \____//   \_____|| 
 `--`      `-----`   `-`  --`   `---`     `----`

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發送短信 : On-off-keying communication system based on low power receiver