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How to Resolve DNS with WIZnet W5500 on STM32F10x?

This STM32F10x maker project shows how to add DNS resolution to a WIZnet W5500 Ethernet application using WIZnet ioLibrary.

ronpang

Published May 16, 2026

Original author: LaoZhangGong123Original source (new tab)

How to Resolve DNS with WIZnet W5500 on STM32F10x?

Project description

How to Resolve DNS with WIZnet W5500 on STM32F10x? Summary This STM32F10x maker project shows how to add DNS resolution to a WIZnet W5500 Ethernet application using WIZnet ioLibrary. The STM32 configures the W5500 over SPI, applies static network information, starts the DNS client on W5500 socket 0, resolves a domain name, and prints the returned IPv4 address through UART. What the Project Does The project is a DNS client example for an STM32F10x microcontroller connected to a WIZnet W5500 Ethernet controller. DNS is used to translate a human-readable domain name into an IP address, which is…

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