Wiznet makers

Overview

Mirsolution developed an industrial Ethernet-based I/O controller using ESP32-S3 and WIZnet’s W5500 for applications that require reliable field control and monitoring.

The product was designed with:

• 8-channel DIO
• 8-channel AIO
• 1-channel RS-485
• Ethernet connectivity based on W5500

A particularly distinctive feature of the product is its digital output design using NPN sink-type DO, which makes it well suited for driving field devices such as buzzers, lamps, and door open/close actuators, based on the project details you provided.

By combining flexible I/O expansion, serial field communication, and Ethernet networking in a single embedded platform, Mirsolution created a practical controller for industrial and facility automation environments.

Background

In industrial and facility automation systems, field devices such as sensors, indicators, alarms, and actuators are often spread across different control points. These environments require a controller that can gather analog and digital signals, communicate with serial equipment, and connect the entire system to Ethernet-based monitoring or control infrastructure.

This creates several practical requirements:

• Support for multiple digital and analog I/O channels
• Reliable control of field devices such as buzzers, lamps, and door actuators
• RS-485 connectivity for industrial serial communication
• Stable Ethernet communication for integration with upper-level systems
• A compact embedded architecture suitable for industrial deployment

To address these needs, Mirsolution developed a controller based on ESP32-S3 and W5500, combining local I/O handling with network connectivity. The ESP32-S3 + W5500 combination is a practical architecture for embedded Ethernet products, and W5500 provides a hardwired TCP/IP Ethernet foundation.

Solution

In this product, ESP32-S3 serves as the main control MCU, while W5500 provides Ethernet connectivity for the system.

The controller integrates:

• 8 digital I/O channels
• 8 analog I/O channels
• 1 RS-485 communication channel
• Ethernet networking through W5500

This architecture enables the controller to interface with a wide range of field devices and signals while also supporting network-based communication.

A notable design point is the NPN sink-type digital output. In practical field applications, this output structure is useful for controlling external devices such as:

• Buzzers
• Signal lamps
• Door opening/closing actuators

Based on your description, this makes the product especially suitable for industrial panels, facility control systems, and access-related equipment where external load control is required.

System Architecture

The system can be understood as follows:

1. Local Signal Interface

The product collects and manages signals through 8-channel DIO and 8-channel AIO, enabling connection to various digital and analog field devices.

2. Field Serial Communication

A 1-channel RS-485 interface supports communication with serial-based industrial devices or subsystems.

3. Main Control with ESP32-S3

The ESP32-S3 handles system control, I/O processing, and application logic. Public examples and technical references show ESP32-S3 as a practical platform for embedded Ethernet applications when paired with W5500.

4. Ethernet Connectivity with W5500

The W5500 provides Ethernet networking, allowing the controller to connect to upper-level systems for monitoring, control, or data exchange. W5500 integrates a hardwired TCP/IP stack, which helps simplify Ethernet implementation in embedded products.

5. Field Output Control

The NPN sink-type DO is used to drive external field devices such as buzzers, lamps, and door actuators, making the controller practical for real-world automation use cases.

Key Technologies

ESP32-S3

ESP32-S3 provides the processing capability needed for embedded control, I/O handling, and system logic. It is widely used in IoT and industrial embedded applications, and it can be paired effectively with external Ethernet controllers such as W5500.

W5500

W5500 is WIZnet’s hardwired TCP/IP Ethernet controller, designed to simplify Ethernet connectivity in embedded systems by offloading much of the networking stack into hardware. This makes it a strong fit for industrial controllers that need reliable wired networking.

Multi-I/O Integration

With DIO, AIO, and RS-485 combined in one product, the controller can interface with a broad range of industrial equipment and field signals.

NPN Sink-Type DO

The use of NPN sink-type digital outputs is an important product characteristic. This structure is especially practical for switching common industrial loads such as alarms, indicator lamps, and door control devices.

Benefits

This ESP32-S3 and W5500-based controller provides several advantages:

• Flexible field connectivity
  The combination of DIO, AIO, and RS-485 allows the product to support many different device types and signal formats.
• Reliable Ethernet integration
  W5500 provides a robust wired networking foundation for industrial monitoring and control. 
• Efficient embedded design
  ESP32-S3 handles application control, while W5500 manages Ethernet connectivity, creating a practical division of functions. 
• Practical output design for real devices
  The NPN sink-type DO makes the controller suitable for real-world loads such as buzzers, lamps, and door actuators.
• Broader application potential
  The mixed I/O structure makes the product adaptable for factory equipment, facility automation, alarm systems, and access-control-related applications.

Conclusion

Mirsolution’s industrial controller demonstrates how ESP32-S3 and WIZnet’s W5500 can be combined to build a versatile Ethernet-based field control product.

By integrating 8-channel DIO, 8-channel AIO, 1-channel RS-485, and NPN sink-type digital outputs into a single platform, the product is able to support a wide range of practical industrial applications. In particular, its ability to control devices such as buzzers, lamps, and door actuators makes it a strong fit for real-world control environments.

With W5500 providing dependable Ethernet connectivity and ESP32-S3 delivering embedded control flexibility, Mirsolution created a compact and capable solution for industrial I/O and field automation.