I would like to design a 5V adapter for the ESP-12F and use the JiriBilek WiFiSPI library.
I think I will use a 4 channel 74ABT125 converter (idea stolen from a schematic for such a converter for SD cards).
Inside the WIFiSPI library it talks about a "safe reset circuit" described under (Safe reset using external circuit · Issue #6 · JiriBilek/WiFiSpiESP · GitHub)
Question 1: Am I correct that using that "safe reset circuit, there is no need for a logic level converter between the 5V SS and the ESP-12F SS? That circuit seems to only supply voltage from the ESP-12F IO5 pin or short to ground.
Question 2: The library talks about an optional "hardware reset" pin. This is a pin on the 5V side that is connected to the reset pin of the ESP-12F. The library does do digitalWrite(HIGH) to this pin. Do I have to provide a logic level converter for this connection?
Question 3: The ESP-12F has an "EN" pin. The datasheet suggests that using that pin can save power. The library doesn't seem to support this feature. I could attach the ESP-12F pin to an available pin on the 5V side and enable/disable from my sketch. Do I need a logic level converter on this connection?