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

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發送短信 : Experience of LoRa low power wide area network