Android Question OTG plus charging

red30

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If the fourth pin microUSB of the connector is snapped to ground, then the device will operate in mode OTG. With the help of library felUsbSerial, I exchange data with the microcontroller. If the fourth pin microUSB of the connector is left unconnected, data exchange does not work. How can I simultaneously exchange data and charge an Android device?
 

red30

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I tried to connect as shown. Still does not work.
eb40526f65f64d579dfc818a128ca819.png
 
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red30

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Longtime User
When I work using OTG, I am in USB host mode.
Can I exchange data with the microcontroller in USB peripheral mode?
Is there an example or library for this?
 
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