W5500 LAN Ethernet to SPI Interface Converter 3.3V 5V Compatible

Specifications

• Core Controller: W5500 full-featured TCP/IP embedded Ethernet controller
• Network Interface: Embedded 10BaseT/100BaseTX Ethernet PHY (RJ45 Port)
• Host Interface: High-speed SPI (Supports SPI mode 0 and 3, up to 80MHz)
• Supported Protocols: TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE
• Hardware Sockets: Supports up to 8 independent simultaneous hardware sockets
• Internal Buffer: 32K bytes of on-chip RAM for TX/RX buffering
• Operating Voltage: 3.3V DC (Crucial: Do not power VCC with 5V)
• Logic Level: 5V I/O signal tolerant (Safe to connect directly to 5V Arduinos)
• Status Indicators: Onboard LEDs for Full/Half-Duplex, Link connection, Speed, and Active status
• Power Features: Supports power-down mode and Wake-on-LAN (UDP)

Features:

• 80MHz high-speed SPI interface
• Built-in hardware TCPIP protocol stack, users need almost no knowledge of complex network protocols
• Support up to 8 Socket connections
• Support TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE protocol
• Integrated data link layer, physical layer
• Support power-down wake up
• Support high-speed serial peripheral interface (SPI mode 0~3)
• Internal 32K byte send and receive buffer
• Embedded 10BaseT/100BaseTX Ethernet Physical Layer (PHY)
• Support auto-negotiation (10/100-Based full/half-duplex)
• IP fragmentation is not supported
• 3.3V working voltage, I/O signal port 5V withstand voltage
• LED status display (full-duplex / half-duplex, network connection, network speed, active status)
• Ultra-small pin package for easily embedded applications
• Provide C application routines

The W5500 Lite is suitable for the following integrated applications:

• Home network devices: Set-Top Boxes, PVRs, Digital Media Adapters
• Standard to Ethernet: Access controls, LED displays, wireless AP relays, etc.
• Parallel-to-Ethernet: POS / Mini Printers, Copiers
• USB to Ethernet: Storage devices, network printers
• GPIO-to-Ethernet: Home Network Sensors
• Security systems: DVRs, Network Cameras, Kiosks
• Factory and building automation
• Medical monitoring equipment
• Integrated servers

Unlock New Capabilities

• Past Projects: If you've mastered sending simple temperature data over Wi-Fi using an ESP8266 or basic Arduino, but find your dashboard goes offline every time the router restarts.
• The Feature Upgrade: The W5500 unlocks true reliability. You can now host high-speed local web servers, stream heavier datasets without packet loss, and maintain 24/7 uptime in electrically noisy environments where Wi-Fi completely fails.

Virtual Technician & Wiring Guide

• ⚠️ CRITICAL WARNING: The W5500 chip requires a stable 3.3V power supply. Connecting the VCC pin to 5V will instantly destroy the module. However, the data pins (MISO, MOSI, SCK, CS) are 5V tolerant, meaning you do not need logic level converters when connecting to a 5V Arduino Uno.

Package Includes:

• 1 x W5500 TCP / IP SPI to LAN Ethernet Interface module

Standard Arduino SPI Wiring:

• VCC: Connect to 3.3V (Ensure your 3.3V regulator can supply at least 150mA)
• GND: Connect to System Ground
• MISO: Connect to Digital Pin 12
• MOSI: Connect to Digital Pin 11
• SCK: Connect to Digital Pin 13
• CS (SCS): Connect to Digital Pin 10 (Can be changed in software)
• INT / RST: Optional (Usually left unconnected for basic projects)

Frequently Asked Questions (FAQ)

• Is the W5500 module compatible with Arduino Uno?
  Yes, it works perfectly with Arduino Uno via the SPI interface. The data pins are 5V tolerant, so direct connection is safe.
• Can I power the W5500 with 5V?
  No. The VCC power pin MUST be connected to 3.3V. Providing 5V to VCC will damage the chip.
• What is the difference between W5100 and W5500?
  The W5500 is newer, faster (80MHz SPI vs 4MHz), supports 8 simultaneous sockets instead of 4, runs cooler, and is much more power-efficient than the older W5100.
• Does this module support Wi-Fi?
  No, this is strictly a wired Ethernet module requiring an RJ45 LAN cable connection.
• Which library should I use for Arduino?
  You can use the standard Arduino "Ethernet" library (make sure it's up to date) or specifically download the "Ethernet2" or "Wiznet Ethernet Library" via the Library Manager.
• Can it act as a web server?
  Yes, the W5500 can be programmed to host a local web server to display sensor data or control relays via a web browser.
• Does the W5500 have a built-in MAC address?
  No, the W5500 does not have a globally unique hardware MAC address burned in. You must assign a MAC address in your initialization code.
• Why is my W5500 getting hot?
  While it runs cooler than a W5100, moderate warmth is normal. However, if it is too hot to touch, immediately check if you accidentally powered it with 5V or have a short circuit.
• Can I use this with an ESP32 or ESP8266?
  Yes, it is highly recommended for ESP boards when wired reliability is needed over Wi-Fi. Just connect it to the ESP's hardware SPI pins.
• Does this module support PoE (Power over Ethernet)?
  No, this specific breakout board does not have built-in PoE circuitry. You must provide external 3.3V power.
• How much current does the W5500 draw?
  It typically draws around 130mA to 150mA during active network transmission. Ensure your 3.3V regulator can handle this.
• Can it send UDP packets?
  Yes, the built-in hardware stack fully supports UDP packet transmission and reception.
• How do I connect multiple W5500 modules to one microcontroller?
  You can share the MISO, MOSI, and SCK lines, but each W5500 module must have its own dedicated CS (Chip Select) pin.
• Does it support Wake-on-LAN?
  Yes, the W5500 supports Wake-on-LAN over UDP.
• Why is my initialization failing?
  The most common issues are inadequate 3.3V power (the Arduino Uno's 3.3V pin sometimes struggles with the peak current) or incorrect SPI wiring.
• Can I assign a static IP address?
  Yes, you can manually assign a static IP, Subnet Mask, and Gateway in your code instead of using DHCP.
• Does it support IPv6?
  No, the W5500 hardware TCP/IP stack only supports IPv4.
• What is the maximum SPI clock speed?
  The W5500 supports an SPI clock speed of up to 80 MHz, allowing for very fast data transfers.
• How do I reset the module?
  You can trigger a hardware reset by pulling the RST pin low for a few milliseconds, or use a software reset command via SPI.
• Can it communicate over the internet or just local networks?
  It can communicate over the global internet as long as your router provides a gateway and DNS, and your ISP allows the outbound traffic.