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can you help with RN131C Wifi module ?

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anotherbrick

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hello forum ,

I am apllying 3.3 V to pin 21 ( VDD-IN ) of RN131C module

and GND to pin 19

I am confused becouse the manual says

"21 (VDD-IN) 3.3 to 3.7 voltage. Do not connect when boost regulator is in use."

do I need to make any other connection for powering the module ?
how can I be sure that te boost regulator is OFF ?
 

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