The Arduino Ethernet W5100 Shield is a powerful expansion board designed to add network connectivity and data storage capabilities to your Arduino projects. Equipped with the W5100 Ethernet controller and a Micro SD card slot, it is ideal for IoT, web server, and data logging applications.

Features

• W5100 Ethernet Controller: Provides stable and fast Ethernet connectivity.
• Micro SD Card Slot: Supports data storage and retrieval for web hosting or logging.
• Integrated TCP/IP Stack: Simplifies network communication protocols.
• Stackable Design: Standard Arduino shield size for compatibility with Arduino Uno, Mega, and similar boards.
• Multiple Socket Connections: Supports up to four simultaneous socket connections.
• LED Indicators: Displays network activity and status.

Specifications

• Ethernet Speed: 10/100 Mbps.
• Micro SD Card Compatibility: FAT16 and FAT32 formatted cards up to 32GB.
• Voltage Input: 5V (powered by Arduino).
• Dimensions: Standard Arduino shield size.
• Communication Interface: SPI for both Ethernet and SD card operations.

Pinout:

• Power Pins:

  • VCC: 5V power supply (from the Arduino)
  • GND: Ground

• SPI Pins (for Ethernet and SD communication):

  • MISO: Master In Slave Out (D12 on Arduino UNO)
  • MOSI: Master Out Slave In (D11 on Arduino UNO)
  • SCK: Serial Clock (D13 on Arduino UNO)
  • SS (Slave Select): Used to select the SPI device (D10 on Arduino UNO)
    
    

• Ethernet Chip Select Pin:

  • CS (Ethernet): Chip Select for the Ethernet module (D10 on Arduino UNO)
    
    

• SD Card Chip Select Pin:

  • CS (SD Card): Chip Select for the microSD card slot (D4 on Arduino UNO)
    
    

• Interrupt Pin (Optional):

  • IRQ: Interrupt Request Pin (used in some applications, not always necessary)
    
    

• Micro SD Card Slot:

  • The shield provides a microSD card slot for data storage, supporting cards up to 32GB.