---
title: "Remote Serial Device Control with WIZ750SR"
url: "https://maker.wiznet.io/Benjamin/projects/remote-serial-device-control-with-wiz750sr/"
markdown_url: "https://maker.wiznet.io/Benjamin/projects/remote-serial-device-control-with-wiz750sr/md"
type: "UCC: User Created Content"
author: "electronhacks"
author_url: "https://www.youtube.com/watch?v=8aHD-6Edywo"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "electronhacks"
original_url: "https://www.youtube.com/watch?v=8aHD-6Edywo"
published: "2025-03-19"
language: "en"
tags: ["Internet of Things", "WIZ750SR"]
hardware: ["WIZnet WIZ750SR"]
likes: 0
views: 2418
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Remote Serial Device Control with WIZ750SR

> Serial to Ethernet Converter with WIZ750SR, Remote Control Support 🚀

Original author: electronhacks (source: https://www.youtube.com/watch?v=8aHD-6Edywo)

## Components

- **WIZnet WIZ750SR** x 1 ([docs](https://docs.wiznet.io/Product/S2E-Module/WIZ750SR/))
- Software: **WIZnet io Library** ([docs](https://github.com/Wiznet/ioLibrary_Driver))

## Article

### **WIZ750SR Serial-to-Ethernet Converter for Remote Industrial Control**

Many **industrial and legacy devices still rely on RS-232 or RS-485 serial communication**. However, modern industrial control systems often require **remote access over TCP/IP networks**. This project demonstrates how the **WIZnet WIZ750SR serial-to-Ethernet module** enables long-distance control of serial devices via the internet.

🚀 **With WIZ750SR, serial devices can be accessed from anywhere, eliminating the need for a local PC or dedicated controller.**

#### **🛠 Project Overview**

- **MCU Used:** WIZ750SR (ARM Cortex-M0-based SoC)

- **Networking Modules:** WIZnet W7500 (Ethernet controller inside WIZ750SR)

- **Software & Protocols:** Modbus RTU/TCP, Ignition SCADA, ACM OPC Server

- **Purpose:** Convert serial devices into **internet-accessible devices**

- **Main Use Cases:** Remote Industrial Monitoring, SCADA Integration, IoT-Based Automation

---

## **📌 Why WIZ750SR? Key Advantages**

🔹 **Seamless Serial-to-Ethernet Conversion**
The **WIZ750SR module** acts as a transparent bridge between **serial devices (RS-232/RS-485) and Ethernet networks**, allowing **legacy devices to be controlled remotely over TCP/IP**.

🔹 **Plug-and-Play Configuration**

- **Quick setup** via WIZnet **Configuration Tool**

- Supports **DHCP or static IP assignment**

- Web-based or serial-based configuration options

🔹 **Industrial Compatibility**

- Supports **Modbus RTU over TCP/IP**, allowing **SCADA systems to control serial devices over Ethernet**

- Works with industrial **remote I/O modules**, enabling **long-range sensor/actuator control**

🔹 **Secure, Reliable Connectivity**

- Uses **dedicated hardware for TCP/IP processing** → Low CPU load

- **Stable Ethernet connectivity** → No risk of **WiFi disconnection or signal interference**

---

## **📌 System Architecture: WIZ750SR for Remote Serial Communication**

### **🔗 How It Works**

1️⃣ **Serial Device (RS-232/RS-485) Connected to WIZ750SR**
2️⃣ **WIZ750SR Converts Serial Data to TCP/IP Packets**
3️⃣ **SCADA or Remote System Sends Modbus TCP Commands**
4️⃣ **WIZ750SR Translates TCP Data Back to Serial Commands**
5️⃣ **Legacy Device Operates as if Locally ConnectedTraditional Serial Communication (Limited Range)**

[Serial Device] ←(RS-485)→ [Local Controller/PC]

**WIZ750SR-Based Remote Access (Unlimited Range)**

`[Serial Device] ←(RS-485)→ [WIZ750SR] ←(Ethernet TCP/IP)→ [Remote Control System] `

🔹 **The Result?Effortless remote monitoring & control for industrial devices!**

---

## **📌 Development Process & Key Challenges**

### **🔧 Hardware & Software Integration**

- **Configured WIZ750SR via WIZnet Config Tool**

- **Set up Modbus RTU over TCP for SCADA compatibility**

- **Integrated OPC server for multi-device management**

### **🔐 Security & Reliability**

- **Firewall rules & VPN** integration for secure access

- **Automatic reconnection features** to prevent data loss

- **Low-latency TCP communication** for real-time monitoring

### **⚡ Industrial Use Cases**

✅ **SCADA Systems**: Remote industrial automation
✅ **Smart Infrastructure**: Monitor legacy devices via TCP/IP
✅ **Energy Monitoring**: Smart grid and power distribution control
✅ **Factory Automation**: Extend serial device usability over Ethernet

---

## **📌 Performance Benefits: WIZ750SR vs. Alternative Solutions**

| Feature | **WIZ750SR (Hardware TCP/IP)** | **Software-Based Serial Server** |
| --- | --- | --- |
| **CPU Load** | **Minimal (Dedicated Processing)** | High (MCU must process all packets) |
| **Stability** | **Always-on, persistent connection** | WiFi-based systems prone to disconnection |
| **Security** | **Firewall & VPN compatible** | Software-only security, more vulnerable |
| **Setup Complexity** | **Simple Web GUI or Serial Config** | Requires additional software setup |

🎯 **With WIZ750SR, you get a stable, low-latency solution for remote serial communication!**

---

## **📌 Conclusion & Future Development**

🔹 **WIZ750SR makes remote serial communication fast, easy, and reliable**
🔹 **Enables industrial devices to be controlled via standard Ethernet networks**
🔹 **Ideal for SCADA, industrial automation, and IoT applications**

### **Future Enhancements**

✅ Adding **MQTT support** for cloud-based automation
✅ Implementing **secure tunneling (TLS/SSL)** for encrypted serial transmission
✅ Expanding **Modbus & BACnet compatibility** for broader industrial use

🚀 **Upgrade your serial devices with WIZ750SR and take your automation system online!**

---

Source: https://maker.wiznet.io/Benjamin/projects/remote-serial-device-control-with-wiz750sr/