With Arduino there is only one SPI port available for general use and the pin number are hard coded into the SPI library. But ESP32 has 3 SPI ports available and there is now ESP32 example sketch to see how the 3 possible SPI ports are handled with the ESP32 SPI library.

How does SPI work with ESP32?

UKHeliBob April 1, 2018, 7:09am 2

When I tried a Google search for ESP32 SPI I got 170,000 hits

I imagine that some of them will have examples

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