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

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發送短信 : Offline peer-to-peer communication system using ESP32 in the event of infrastructure failure