Wiznet makers

Overview

Industrial monitoring, agriculture, building management, and environmental sensing applications often distribute sensors across large or difficult-to-wire areas. Ethernet may not be practical at every remote measurement point, while the central gateway may still require a stable wired connection to a local server or supervisory system.

This project combines the Waveshare ESP32-S3-POE-ETH-8DI-8DO industrial controller with an SX1262-LoRa-DTU-xF long-range wireless module to form a LoRa-to-Ethernet gateway architecture.

Remote nodes communicate with the gateway over LoRa. The ESP32-S3 can process the received data, and the onboard W5500 can forward it to a local server, MQTT broker, or higher-level management system through wired Ethernet.

Why Combine LoRa and Ethernet?

LoRa and Ethernet do not need to compete for the same role. Each technology can serve a different segment of the network.

LoRa for Field Connectivity

• Long-range wireless communication
• Connection to sensors where cabling is impractical
• Transport of low-volume status and measurement data
• Suitability for farms, warehouses, remote equipment, and facility perimeters

Ethernet for the Backhaul

• Wired communication between the gateway and a server
• Integration with an existing local network
• Support for MQTT, HTTP, or custom TCP/UDP applications
• Connection through standard switches and IT infrastructure

This combination allows remote nodes to benefit from LoRa coverage while the gateway uses W5500 Ethernet for its upstream connection.

Main Hardware

ESP32-S3-POE-ETH-8DI-8DO

The industrial controller integrates:

• ESP32-S3 dual-core processor
• W5500 10/100 Mbps Ethernet
• IEEE 802.3af PoE
• Eight isolated digital inputs
• Eight isolated digital outputs
• Isolated RS485
• Isolated CAN
• 7–36 V industrial power input
• RTC and TF card slot
• DIN-rail enclosure

The W5500 connects to the ESP32-S3 over SPI and extends 10/100 Mbps wired Ethernet. The onboard PoE module allows network data and power to be delivered through one Ethernet cable.

SX1262-LoRa-DTU-xF

The SX1262-based LoRa DTU provides the long-range wireless link between remote LoRa nodes and the gateway.

The project combines this wireless interface with the ESP32-S3 industrial controller to create a central hub capable of bridging field data to an Ethernet network.

System Architecture

Remote Sensor / LoRa Node
          │
        LoRa
          │
  SX1262 LoRa DTU
          │
 UART / Local Interface
          │
       ESP32-S3
   ┌──────┼─────────────┐
 8DI/8DO  RS485/CAN   Data Processing
          │
        W5500
          │
   PoE Ethernet Network
          │
 Local Server / MQTT Broker
 Dashboard / SCADA / Cloud

A remote sensor or node transmits its data over LoRa. The SX1262 module receives the message, and the ESP32-S3 can validate, transform, or package the data before forwarding it through W5500 Ethernet.

A reverse path can also be designed: commands arriving from the Ethernet network can be converted into LoRa messages or applied to the controller’s digital outputs.

The Role of W5500

Wired Backhaul for the LoRa Network

The SX1262 handles the wireless field segment, while W5500 provides the wired connection between the gateway and the local network.

Integration with Industrial Infrastructure

Through Ethernet, the gateway can connect to switches, on-premise servers, SCADA systems, or MQTT infrastructure already present at the installation site.

Reduced Dependence on Wi-Fi

In environments with metal structures, radio congestion, or policies that restrict Wi-Fi, wired Ethernet can provide the gateway’s primary upstream connection.

Simplified Installation with PoE

PoE can deliver power and network connectivity over the same cable, reducing the need for a separate adapter and power wiring. Waveshare specifies IEEE 802.3af PoE support for the board.

Why the Eight Inputs and Outputs Matter

Many LoRa gateways only forward wireless packets. This controller also provides eight isolated digital inputs and eight isolated digital outputs.

Possible Input Signals

• Door and safety-switch status
• Machine run/stop contacts
• Level or pressure switches
• Intrusion and fire-alarm contacts
• Pump and motor status

Possible Output Functions

• Beacon and buzzer control
• Relay activation
• Pump and valve control
• Ventilation-fan control
• Remote reset or enable signals

The board uses isolated input/output circuitry, and Waveshare specifies Darlington-transistor outputs with sink current of up to 500 mA per channel.

This allows the platform to evolve from a protocol bridge into an industrial edge gateway combining LoRa communication, Ethernet backhaul, and local control.

Example Data Flows

Remote Monitoring

Sensor
→ LoRa Node
→ SX1262 Gateway
→ ESP32-S3
→ W5500 Ethernet
→ MQTT / HTTP / Local Server
→ Dashboard

Remote Control

Dashboard / SCADA
→ Ethernet
→ W5500
→ ESP32-S3
→ Digital Output or LoRa Command
→ Field Equipment

Local Fail-Safe Logic

Digital Input
→ ESP32-S3 Local Logic
→ Digital Output

Network Reporting
→ W5500 Ethernet or LoRa

Local control logic could be designed to continue operating even when the upstream server is unavailable. However, the available public material should not be interpreted as proof that a specific fail-safe algorithm has already been implemented.

Potential Applications

Smart Agriculture

• Soil-moisture and temperature monitoring
• Remote pump and irrigation-valve control
• Greenhouse ventilation and alarms
• Aggregation of LoRa sensors across a large farm

Industrial Facilities

• Monitoring of remote machinery
• Tank and pump supervision
• Sensor connectivity in areas where new cabling is difficult
• Collection of alarm and dry-contact signals

Building and Energy Management

• Distributed electrical-equipment monitoring
• Generator and UPS contact supervision
• Outdoor equipment status reporting
• Remote beacon and relay control

Environmental Monitoring

• Water-quality and weather sensors
• Forest, river, and reservoir monitoring
• Remote warning systems
• Multi-point sensing across large facilities

Engineering Considerations

A real deployment should evaluate:

• The permitted LoRa frequency for the deployment country
• Transmit-power and duty-cycle regulations
• Device addressing and packet format
• Duplicate-packet and retransmission handling
• LoRa message authentication and encryption
• Buffering during Ethernet outages
• Server reconnection behavior
• PoE power budget
• Outdoor environmental and surge protection
• Actual LoRa-to-Ethernet latency and throughput

Any quoted LoRa range depends heavily on the antenna, frequency, transmit power, obstacles, and installation environment. A field link test is therefore required rather than treating a nominal range as guaranteed performance.

Difference from Existing Maker Content

The ESP32-S3-POE-ETH-8DI-8DO board has already been introduced on the Maker site as an industrial controller with W5500, PoE, RS485, CAN, and isolated I/O.

This project should therefore focus on a different subject:

• An SX1262-based LoRa field network
• ESP32-S3 data processing
• W5500 Ethernet backhaul
• PoE-powered gateway installation
• Integration of isolated 8DI/8DO field signals

The existing article explains what the controller board is. This project explains how the controller can be combined with SX1262 to build an industrial LoRa-to-Ethernet gateway.

Conclusion

This project presents an industrial gateway architecture that combines LoRa field communication with W5500 wired Ethernet.

The SX1262 communicates with remote sensors, the ESP32-S3 processes the data, and the W5500 connects the gateway to a local server or supervisory network. PoE and isolated digital I/O extend the platform beyond a basic LoRa bridge and make it suitable for industrial edge-control concepts.

Its main value is not dependence on a specific cloud platform, but a reusable hardware architecture for connecting a LoRa field network to an Ethernet-based industrial infrastructure.

FAQ

What is an industrial LoRa-to-Ethernet gateway?

An industrial LoRa-to-Ethernet gateway receives data from remote LoRa sensors or devices and forwards it to a local server, MQTT broker, SCADA system, dashboard, or cloud platform through wired Ethernet.

What hardware is used in this project?

The project combines a Waveshare ESP32-S3-POE-ETH-8DI-8DO industrial controller with an SX1262-LoRa-DTU-xF long-range wireless module.

What is the role of the SX1262?

The SX1262 provides the long-range wireless link between the central gateway and remote LoRa sensors or field devices.

What is the role of the W5500?

The W5500 provides the wired 10/100 Mbps Ethernet backhaul between the ESP32-S3 gateway and the local industrial network, server, MQTT broker, SCADA system, or cloud connection.

Why combine LoRa and Ethernet in one gateway?

LoRa is suitable for connecting remote sensors where new cabling is difficult, while Ethernet provides a stable upstream connection from the central gateway to the server or control network.

Does the gateway support Power over Ethernet?

The controller supports IEEE 802.3af PoE, allowing network data and power to be delivered through one Ethernet cable.

What are the eight digital inputs used for?

The isolated digital inputs can receive dry-contact or industrial status signals such as door switches, machine run states, level switches, pressure switches, alarms, and equipment fault contacts.

What are the eight digital outputs used for?

The isolated digital outputs can control relays, warning lights, buzzers, pumps, valves, ventilation fans, remote-reset inputs, or other field-control signals within their electrical ratings.

Does the gateway support RS485 and CAN?

Yes. The industrial controller includes isolated RS485 and CAN interfaces, allowing the ESP32-S3 to communicate with additional industrial sensors, controllers, or field devices.

Can the gateway send data to MQTT or SCADA?

The architecture can forward processed data through W5500 Ethernet to an MQTT broker, SCADA system, local server, dashboard, or cloud application. The exact protocol depends on the implemented firmware.

Can commands travel from Ethernet back to LoRa devices?

The architecture can support bidirectional communication. Commands received through Ethernet may be processed by the ESP32-S3 and forwarded to a LoRa node or applied to a local digital output, depending on the firmware implementation.

What happens if the Ethernet connection is interrupted?

A production implementation can buffer LoRa data locally and retry transmission when the Ethernet connection returns. However, buffering, retry, and recovery behavior must be explicitly implemented and tested in the firmware.

Is the advertised LoRa range guaranteed?

No. Actual range depends on the radio frequency, antenna, transmit power, terrain, buildings, interference, installation height, and local regulations. Field testing is required for each deployment.

What applications can use this gateway?

Potential applications include smart agriculture, irrigation control, industrial equipment monitoring, tank and pump supervision, building-energy management, environmental sensing, utility monitoring, remote alarms, and distributed digital I/O control.

What makes this system different from a normal LoRa gateway?

A normal LoRa gateway primarily forwards wireless packets. This system also integrates W5500 Ethernet, PoE, isolated 8DI/8DO, RS485, and CAN, allowing it to work as both a communication gateway and an industrial edge controller.