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     -   [How to Use](#section79302049192310)
 
 -   [Repositories Involved](#section96071132185310)
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 ## Introduction<a name="section11660541593"></a>
 
 Misc devices, including vibrators and LED indicators, are used to send signals externally. You can call APIs to control the vibration of vibrators and lighting-on and lighting-off of LED indicators.