ESP32: MDC and MDIO over I2C Mux, clock limit of 400 KHz

Projects Networking, Protocols, and Devices
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The I2C Mux has the upper limit of 400 KHz.

  1. How do I reduce the MDC clock rate to be able to support this limitation of the Mux.

I'm assuming I have to modify the libraries.
I'm trying to setup the idf-4.4 libraries that seems to support the LAN87xx devices.

  1. Could you point me to a link that shows how to include idf 4.4 into Arduino Libraries,, is it as simple as drop into the libraries folder and Arduino will use this latest one?

Thank you

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