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Green circuit board with RJ45 port, USB-C connector, and PoE module attached

MCDODO

MCDODO ESP32-S3 Ethernet Development Board 240MHz Dual Core PoE Module

SKU CH-JKBT-DXDT5

ESP32-S3 development board with 10/100Mbps Ethernet, PoE, 240MHz dual-core, 16MB flash, 8MB PSRAM, Wi-Fi and Bluetooth 5

  • TypeSingle Board Computers
  • Dual-core 240 MHz processor speeds edge tasks
  • W5500 chip gives 10/100 Mbps wired Ethernet
  • PoE module delivers power and data over one cable
  • 16 MB Flash plus 8 MB PSRAM stores firmware and buffers
  • Bluetooth 5 LE and 2.4 GHz Wi-Fi enable wireless links

ESP32-S3 PoE Development Board

This ESP32-S3 Ethernet development board combines a 240 MHz dual-core processor with integrated Wi-Fi, Bluetooth 5 and a 10/100 Mbps RJ45 port. The onboard W5500 chip handles wired connectivity through SPI while the PoE module delivers both power and data over a single Ethernet cable. It targets makers building IoT edge devices that need reliable wired networking without separate power supplies.

Thermals and Power over Ethernet

The PoE module draws power directly from the Ethernet infrastructure, eliminating an external adapter and reducing cable clutter at the deployment site. With no active cooling fitted, the board relies on the low power draw of the ESP32-S3R8 chip and the efficiency of the W5500 Ethernet controller to stay within safe temperatures during continuous operation. The single-cable design simplifies installation in ceilings, cabinets or outdoor enclosures where mains sockets are unavailable.

Camera Interface and Pico-Compatible Header

An onboard camera connector supports OV2640 and OV5640 modules for image capture and video monitoring applications. The Pico-compatible header allows the board to work with a range of Raspberry Pi Pico HATs, expanding sensor and actuator options without custom PCBs. A USB Type-C port provides programming, debugging and an alternative power path when PoE is not used.

Highlights

  • Dual-core 240 MHz processor speeds edge tasks
  • W5500 chip gives 10/100 Mbps wired Ethernet
  • PoE module delivers power and data over one cable
  • 16 MB Flash plus 8 MB PSRAM stores firmware and buffers
  • Bluetooth 5 LE and 2.4 GHz Wi-Fi enable wireless links

Specifications

TypeSingle Board Computers

Questions about this item

How do I power the ESP32-S3 Ethernet board using the PoE module and which pins carry the power?

Connect the RJ45 cable to the W5500 Ethernet chip; the PoE module extracts power from the same cable and feeds the board through the onboard power rails, so no separate USB-C supply is needed when PoE is active.

Will the onboard flash or the micro-SD slot wear out first if I log sensor data continuously?

The 16 MB flash handles firmware; heavy logging should target the TF card slot, which is user-replaceable, while the soldered flash remains mostly static.

At sustained load does the 10/100 Mbps Ethernet link or the 240 MHz dual-core processor become the bottleneck first?

The 100 Mbps wired link saturates well before the dual-core Xtensa LX7 reaches its compute ceiling in typical packet-forwarding tasks.

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