WIZnet W5500, W5200, W5100 Ethernet Example for STM32 microcontrollers using Arduino Environment.

Hardware requirements

• STM32F103 Development Board
• W5100/W5200/W5500 Ethernet Module
  About $5 for aliexpress/eBay.
  W5100 is for 5V only.
  W5500 can be used at both 3.3V / 5V.
• ST-LINK/V2 or ST-LINK/V2.1 Module
  About $5 for aliexpress/eBay.
  You can use NECLEO board as ST-LINK/V2.1
• USB-TTL Converter
  For Serial monitoring.
• External Voltage Regurator
  BluePill or BlackPill board cannot supply too much current.
  It is more stable when supplied from an external power source.
  AMS1117 is often used.