---
title: "ST-W55RP20-C16 – Pico Ethernet Evaluation Board"
url: "https://maker.wiznet.io/ssekim/resellers/st-w55rp20-c16--pico-ethernet-evaluation-board/"
markdown_url: "https://maker.wiznet.io/ssekim/resellers/st-w55rp20-c16--pico-ethernet-evaluation-board/md"
type: "VAR: Value-Added Reseller Products"
author: "Sharvi Electronics"
author_url: "https://sharvielectronics.com/product/st-w55rp20-c16-pico-ethernet-evaluation-board-with-16mb-flash-memory-usb-c-type"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "Sharvi Electronics"
original_url: "https://sharvielectronics.com/product/st-w55rp20-c16-pico-ethernet-evaluation-board-with-16mb-flash-memory-usb-c-type"
published: "2025-11-18"
language: "en"
tags: ["W5500"]
hardware: ["WIZnet W5500", "Raspberry Pi RP2040"]
likes: 0
views: 418
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# ST-W55RP20-C16 – Pico Ethernet Evaluation Board

> The ST-W55RP20-C16 board, based on the structure of the WIZnet W5500-EVB-Pico, is an enhanced clone board that integrates the RP2040, W5500, and 16M flash.

Original author: Sharvi Electronics (source: https://sharvielectronics.com/product/st-w55rp20-c16-pico-ethernet-evaluation-board-with-16mb-flash-memory-usb-c-type)

## Components

- **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500))
- **Raspberry Pi RP2040** x 1 ([docs](https://www.raspberrypi.com/documentation/microcontrollers/rp2040.html))

WIZnet parts: W5500 ([Datasheet](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/datasheet?utm_source=maker&utm_medium=project&utm_campaign=w5500), [product hub](https://maker.wiznet.io/products/w5500/))

## Article

## **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.

![](https://maker.wiznet.io/upload/ckeditor5/397664688%5F1763448040%2Epng)

## **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.

![](https://maker.wiznet.io/upload/ckeditor5/397664688%5F1763448024%2Epng)

## **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**

|  | **W5500-EVB-Pico** | **ST-W55RP20-C16** |
| --- | --- | --- |
| **MCU** | RP2040 | RP2040 |
| **Ethernet** | W5500 | W5500 |
| **Flash ** | 2 MB | 16 MB (4MB/8MB) |
| **USB** | Micro-USB | USB-C |
| **Price** | KRW 14000 (USD 11) | ₹ 675.77 (USD 7.6) |
| **S/W** | Compatible with Pico SDK and W5500 examples |  |
| **Pinmap** | Pin-to-pin compatible with W5500-EVB-Pico |  |

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Source: https://maker.wiznet.io/ssekim/resellers/st-w55rp20-c16--pico-ethernet-evaluation-board/