W5100 Ethernet Shield LAN Network Module Compatible with W5500, IP 51/STM32 Microcontroller

What It Is This is a replacement network module designed for embedded development work with microcontrollers such as the STM32 series. It provides Ethernet connectivity through the SPI interface and is supplied with 32k bytes of onboard buffer memory. The module is built as a drop-in alternative to the W5100 Ethernet Shield, offering a practical way to add network capability to your projects. Connectivity and Protocol Support The module supports hardwired TCP/IP protocols including TCP, UDP, ICMP, IPv4, IGMP and PPPoE. This means it can handle the core networking stack without placing additional load on your main microcontroller, leaving it free to focus on your application logic. The hardwired approach helps keep data transfer efficient and reliable during network communication. Practical Features for Everyday Use A power down mode is included, allowing the module to reduce its power consumption when the network connection is not actively in use. This can be particularly useful in low-power or battery-operated designs where energy efficiency matters. The module also supports up to eight sockets simultaneously, giving you the flexibility to manage multiple network connections at once within a single project. Build Quality and Integration The module is supplied as new and is ready to integrate into your existing setup. It is designed to work with microcontrollers that communicate over SPI, making it straightforward to connect to a wide range of development boards. With its compact form factor and clear pin layout, it suits prototyping environments as well as more permanent embedded installations.