---
title: "TCP/IP Client server with STM32"
url: "https://maker.wiznet.io/josephsr/projects/tcp-ip-client-server-with-stm32/"
markdown_url: "https://maker.wiznet.io/josephsr/projects/tcp-ip-client-server-with-stm32/md"
type: "UCC: User Created Content"
author: "STech"
author_url: "https://www.youtube.com/watch?v=POZ-YV5jxOE"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "STech"
original_url: "https://www.youtube.com/watch?v=POZ-YV5jxOE"
published: "2025-03-19"
language: "en"
hardware: ["STMicroelectronics STM32F407VETx", "WIZnet W5500"]
likes: 0
views: 1255
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# TCP/IP Client server with STM32

> This project demonstrates how to establish reliable and efficient Ethernet communication using the ESP32 microcontroller and the W5500 Ethernet module.

Original author: STech (source: https://www.youtube.com/watch?v=POZ-YV5jxOE)

## Components

- **STMicroelectronics STM32F407VETx** x 1
- **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500))

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. Project Overview & FeaturesCore Functionality:**

- Implements **stable Ethernet communication** using an ESP32 microcontroller and a W5500 Ethernet module.

**Problem Solved & Purpose:**

- Resolves **wireless connectivity issues** by providing a **more stable wired network** for IoT applications.

- Improves **network reliability and speed** for devices requiring a consistent connection.

**Key Features:**

- **Hardware:** ESP32 microcontroller, W5500 Ethernet module

- **Network:** Wired Ethernet via W5500

- **Protocol:** TCP/IP socket communication

- **Data Handling:** Utilizes ESP32 for data transmission

---

### **2. Hardware & Software StackHardware:**

- **MCU:** ESP32 board

- **Network Module:** W5500 Ethernet module

- **Additional Peripherals:** No specific sensor mentioned, but can integrate with various sensors

**Software:**

- **Programming Language:** C/C++

- **Libraries Used:**
  - **Arduino Ethernet library**
  - **SPI library**

- **Network Protocol:** TCP/IP

---

### **3. Key Parts of the Source Code**

#### **Ethernet Initialization & Setup**

```plaintext
#include <Ethernet.h>
#include <SPI.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 1, 177);

void setup() {
  Ethernet.begin(mac, ip);
  // Additional setup code
}
```

**Server Socket Creation & Client Handling**

```plaintext
EthernetServer server(80);

void loop() {
  EthernetClient client = server.available();
  if (client) {
    // Process client requests
  }
}
```

### **4. Comparison with Traditional ImplementationsAdvantages:**
✅ **Stable Wired Connection:** More reliable than Wi-Fi, with fewer interference issues.
✅ **Hardware-Based TCP/IP Offloading:** The W5500 module handles networking independently, reducing the ESP32’s processing load.

**Disadvantages:**
❌ **Limited Installation Flexibility:** Wired connections restrict placement options.
❌ **Additional Hardware Cost:** Adding a W5500 module increases cost and circuit complexity.

---

### **5. Suggested Improvements & Enhancements**

✔ **Security Enhancements:** Implement **TLS/SSL** encryption for secure data transmission.
✔ **Error Handling:** Add mechanisms to detect and handle **network failures and unexpected errors**.
✔ **Data Logging:** Enable **local storage (SD card)** or **cloud database integration** for long-term data tracking.
✔ **Real-time Monitoring:** Implement a **web server interface** or integrate with **Node-RED** for real-time data visualization.

---

Source: https://maker.wiznet.io/josephsr/projects/tcp-ip-client-server-with-stm32/