---
title: "How to Build a Reliable Industrial IoT Data Collection System with STM32 and W5100S?"
url: "https://maker.wiznet.io/mark/projects/how-to-build-a-reliable-industrial-iot-data-collection-system-with-stm32-and-w5100s/"
markdown_url: "https://maker.wiznet.io/mark/projects/how-to-build-a-reliable-industrial-iot-data-collection-system-with-stm32-and-w5100s/md"
type: "UCC: User Created Content"
author: "ZLinear开源电子"
author_url: "https://www.bilibili.com/video/BV1DZ6mBJEw3/?spm_id_from=333.1387.upload.video_card.click&vd_source=ab013cc5ffdecedae5ee47ae256d7306"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "ZLinear开源电子"
original_url: "https://www.bilibili.com/video/BV1DZ6mBJEw3/?spm_id_from=333.1387.upload.video_card.click&vd_source=ab013cc5ffdecedae5ee47ae256d7306"
published: "2026-02-27"
language: "en"
likes: 0
views: 296
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# How to Build a Reliable Industrial IoT Data Collection System with STM32 and W5100S?

> This project implements an Industrial IoT data acquisition system using STM32 and the WIZnet W5100S Ethernet controller.

Original author: ZLinear开源电子 (source: https://www.bilibili.com/video/BV1DZ6mBJEw3/?spm_id_from=333.1387.upload.video_card.click&vd_source=ab013cc5ffdecedae5ee47ae256d7306)

## Article

## How to Build a Reliable Industrial IoT Data Collection System with STM32 and W5100S?

## (STM32와 W5100S로 안정적인 산업용 IoT 데이터 수집 시스템 구축하기)

---

### Project Summary (56 words)

This project implements an Industrial IoT data acquisition system using STM32 and the WIZnet W5100S Ethernet controller. By leveraging hardwired TCP/IP offloading instead of Wi-Fi networking, the system achieves deterministic and reliable data transmission suitable for long-term industrial monitoring and remote diagnostics.

---

### System Architecture Overview

#### Core Components

**STM32**

Sensor acquisition

Local data buffering

Control and filtering logic

**W5100S**

Hardwired TCP/IP stack

4 hardware sockets

SPI communication

Ethernet interface

**Industrial Sensors**

Environmental

Electrical

Mechanical

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### Network Architecture & Protocol Flow

#### Communication Flow

Sensors → STM32 → SPI → W5100S → Ethernet → Router → Cloud / Server

#### Protocol Layering

| Layer | Responsibility |
| --- | --- |
| Application | Sensor data formatting |
| Transport | TCP / UDP |
| Network | IP handled by W5100S |
| Physical | Ethernet |

Because TCP/IP is handled in hardware, the MCU firmware remains simple and predictable.

---

### Ethernet vs Wi-Fi in Industrial IoT

| Feature | W5100S Ethernet | Wi-Fi MCU |
| --- | --- | --- |
| RF interference | None | Possible |
| Deterministic latency | High | Variable |
| Firmware complexity | Low | High |
| Long-term stability | Excellent | Moderate |

Industrial environments favor Ethernet for reliability and maintainability.

---

### Reliability & Industrial Design Perspective

The design ensures:

Stable data transmission

Reduced CPU overhead

Predictable network timing

Separation of acquisition and communication tasks

This mirrors professional industrial controllers and PLC communication modules.

---

### FAQ (WIZnet-Focused)

**Q1: Why use W5100S instead of Wi-Fi for data collection?**
A: W5100S provides hardwired TCP/IP processing, ensuring stable Ethernet communication without RF instability.

**Q2: How does STM32 communicate with W5100S?**
A: Via SPI, separating control logic from networking hardware.

**Q3: Is this suitable for 24/7 industrial deployment?**
A: Yes. Ethernet-based designs are preferred in industrial monitoring systems.

**Q4: Can MQTT be implemented?**
A: Yes, at the application layer on top of TCP sockets.

**Q5: What advantage does hardware TCP/IP offer?**
A: Lower CPU usage, simplified firmware, and deterministic communication behavior.

---

### Tags

#W5100S #STM32 #IndustrialIoT #Ethernet #DataCollection #EmbeddedSystems

---

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## 🇰🇷 KOREAN VERSION

## STM32와 W5100S로 안정적인 산업용 IoT 데이터 수집 시스템을 구축하는 방법은?

## (How to Build a Reliable Industrial IoT Data Collection System with STM32 and W5100S?)

---

### 프로젝트 개요 (56단어)

이 프로젝트는 STM32와 WIZnet W5100S 이더넷 컨트롤러를 사용하여 산업용 IoT 데이터 수집 시스템을 구현합니다. Wi-Fi 대신 하드웨어 TCP/IP 오프로딩 기반 이더넷을 사용하여 장기간 안정적인 데이터 전송과 산업 환경에 적합한 신뢰성을 제공합니다.

---

### 시스템 구성

STM32: 센서 데이터 수집 및 처리

W5100S: 하드웨어 TCP/IP 기반 이더넷 통신

산업용 센서: 환경 및 장비 모니터링

---

### 네트워크 아키텍처

Sensors → STM32 → SPI → W5100S → Ethernet → 서버/클라우드

TCP/IP 처리는 W5100S가 담당하여 MCU의 부하를 줄입니다.

---

### 산업용 IoT 관점

유선 이더넷 사용

예측 가능한 지연시간

낮은 펌웨어 복잡도

24/7 운용에 적합

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### FAQ

**Q1: 왜 W5100S를 사용하나요?**
A: 안정적이고 결정론적인 이더넷 통신을 제공하기 때문입니다.

**Q2: STM32와 연결 방식은?**
A: SPI 인터페이스입니다.

**Q3: 산업용에 적합합니까?**
A: 네, 산업 모니터링 시스템에 적합합니다.

**Q4: MQTT 지원 가능합니까?**
A: TCP 기반 애플리케이션 레벨에서 구현 가능합니다.

**Q5: 하드웨어 TCP/IP의 장점은?**
A: CPU 부하 감소와 안정적인 통신입니다.

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Source: https://maker.wiznet.io/mark/projects/how-to-build-a-reliable-industrial-iot-data-collection-system-with-stm32-and-w5100s/