1. Clone Board Built on the W5500-EVB-Pico Architecture

The ST-W55RP20 series is a functional clone of the WIZnet W5500-EVB-Pico, inheriting its core architecture and software ecosystem.
It uses the same design philosophy—RP2040 MCU + W5500 Ethernet controller—ensuring identical behavior in networking, peripheral usage, and software compatibility.

By maintaining the Raspberry Pi Pico form factor and pin mapping, this board seamlessly supports existing Pico expansion boards, shields, and circuit designs without modification.
This makes it a direct, drop-in replacement for EVB-Pico-based projects.

2. Enhanced Design With Upper-Compatible Features and Multiple Flash Options

The ST-W55RP20 series improves upon the original W5500-EVB-Pico by adding features that increase durability, scalability, and industrial applicability.
One of the key enhancements is the availability of multiple QSPI Flash capacities—4MB, 8MB, and 16MB—allowing developers to choose a model that fits their project’s firmware and data requirements.

The highest-capacity 16MB version (ST-W55RP20-C16) offers eight times the storage of the original EVB-Pico (2MB), making it ideal for applications that require large firmware images, OTA updates, long-term data logging, or filesystem-based storage.

All models feature a USB Type-C connector, improving physical durability, stability, and compatibility with modern development setups compared to Micro-USB.

3. Full Compatibility With the Pico Ecosystem and WIZnet Software

Since the ST-W55RP20 series uses the exact same RP2040 + W5500 + SPI structure as the W5500-EVB-Pico, it provides 100% software compatibility.

Key benefits include:

WIZnet’s official GitHub examples run without code modification

Full support for Arduino-Pico, Pico SDK, CircuitPython, and other RP2040 libraries

Identical behavior in TCP/UDP/ICMP/ARP/IGMP/PPPoE

EVB-Pico projects can be ported instantly as a drop-in hardware alternative

This makes the board extremely practical for both beginners and professionals who want to migrate existing designs or scale them into more robust products.

4. Suitable for Industrial IoT 

The ST-W55RP20-C series is more than a development board—it is a versatile Ethernet-enabled platform capable of supporting industrial and commercial IoT deployments.

Typical applications include:

Industrial IoT edge devices

Data loggers with filesystem and long-term storage

Energy, solar, and ESS monitoring equipment

Smart meters and instrumentation

Networked sensor hubs

Real-time controllers requiring stable Ethernet

Retrofit upgrades for Pico-based prototype systems

W5500’s dedicated hardware TCP/IP engine ensures robust, low-latency Ethernet communication, making the platform reliable for long-term, real-world deployment scenarios.

5. Comparison Table