How Can W5500 Give Eight Relays and Inputs a BACnet Management Interface?
JimBoHa adds BACnet objects, priority-aware relay commands and authenticated Ethernet updates to a Waveshare ESP32-S3 controller with W5500.
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Components
Hardware components
WIZnet - W5500
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Onboard Ethernet controller; ESP32-S3 SPI2 at 20 MHz, CS16, IRQ12, reset39. ESP-IDF Ethernet and lwIP carry BACnet/IP on UDP47808.
Project description
Eight Inputs and Eight Relay Commands on a Building Network JimBoHa's BACnet/IP firmware turns the Waveshare ESP32-S3-POE-ETH-8DI-8RO-C into an Ethernet-connected building-control node. The replacement application exposes eight digital inputs, eight relay commands and device health as BACnet objects. An ESP32-S3 runs the control and protocol software, while the onboard W5500 connects the controller to the Ethernet network. The independent GitHub project appeared on 31 August 2026 and reached firmware 0.13.2 with substantive fixes on 5 September. JimBoHa publishes the application, build…
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