Original : https://depfields.com/ethernet/
Basic knowledge for connecting microcomputer to the Internet
IoT used by connecting to a network has also permeated embedded devices. Network connectivity via WiFi is common in familiar consumer products such as TVs and other home appliances and smartphones, but Ethernet, which is one of the wired communications, is used for products for industrial devices that require operational stability and security.
In this article, I will explain how to apply an external Ethernet-compatible LAN controller W5500 to a general-purpose MCU (Nucleo-F103RB) that has been familiar to us so far to support Ethernet IoT. The target is the STM32 microcomputer, but it is an easy means that can be used for any model by customizing the interface (SPI communication) between the microcomputer and the LAN controller.
Here, network-related explanations such as IP addresses are not discussed.
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