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Rewrite the MAC address of W5500 from the terminal

There is an Ethernet controller IC from WIZnet called W5500.
It is also used in the official Arduino Ethernet shield, making it a
very conve

WIZnet

Published December 05, 2022

Original author: T-Oda-BTO · IndiaOriginal source (new tab)

Rewrite the MAC address of W5500 from the terminal

Components

Hardware components
W5100 ethernet shield

WIZnet - W5100 ethernet shield

x 1

Software Apps and online services
Arduino IDE

Arduino - Arduino IDE

x 1

Project description

Introduction There is an Ethernet controller IC from WIZnet called W5500. It is also used in the official Arduino Ethernet shield, making it a very convenient chip for prototyping with a browser. I have to pass the MAC address, IP address, subnet, etc. from the microcomputer to the W5500, but since the sample code assumes direct input of the source, it is quite difficult to get out of the realm of prototyping. Therefore, I wrote a code that stores the MAC address, IP, etc. in the EEPROM inside the Arduino and can be rewritten from a terminal such as TeraTerm, so I will share it. Please for…

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