interfacing esp12e wifi module with arduino through sdio protocol

Hi everyone,

Anyone using SDIO protocol for interfacing esp12e wifi module with stm32f4 controller?

If yes, please guide me how to use.

I have some doubts about esp12e wifi module, but no one gave exact answers and finally confused me a lot.

In esp12e module what is the uses of SPI,HSPI,UART,SDIO protocols?

How can i jump into different protocol modes?

MY aim is to implement SDIO protocol for communicating with esp12e via stm32f4.

If i use SDIO Protocol is it required SD Card?

Please help me anyone

Thank you

Regards Amarr.M