How Two W5500 Nodes Bridge Siemens LOGO Telemetry Across 500 m of LoRa
A 2026 UTFSM thesis uses two STM32-W5500 Ethernet nodes and SX1278 LoRa to read a Siemens LOGO register across an offline 500 m rural link.
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Components
Hardware components
WIZnet - W5500
x 2
Two SPI Ethernet modules: remote-node Modbus TCP client to the Siemens LOGO and base-node TCP server to the control-room PC.
Project description
📌 Two Ethernet Islands Across a Rural Site Alan Gamalier Vergara Muñoz's 2026 thesis at Universidad Técnica Federico Santa María presents two local Ethernet islands joined by a direct LoRa field link. An irrigation shelter and an operator shelter sit about 500 m apart on a rural property without a practical Internet or cable route. The prototype keeps Ethernet beside the Siemens LOGO PLC and the operator PC, then uses SX1278 radios only for the long crossing. Each end uses the same core stack: an STM32F103C8T6, a WIZnet W5500 Ethernet module, and an SX1278 radio. Point-to-point LoRa here…
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