LORDWORLD Power Over Ethernet HAT (B) development board

PoE HAT for Raspberry Pi 3B+ and 4B

This LORDWORLD add-on board equips a Raspberry Pi 3B+ or 4B with 802.3af-compliant Power over Ethernet. A fully isolated switched-mode supply draws power from the network cable, removing the need for a separate USB-C adaptor. The standard 40-pin GPIO header aligns directly with the Pi's connector.

Makers needing single-cable power and monitoring

Developers building headless IoT nodes, remote sensors or clustered Pi servers benefit from the integrated .91-inch OLED that shows CPU temperature, IP address and fan state at a glance. The PCF8574 I2C expander adds extra I/O for custom peripherals. Builders who lack 802.3af power sourcing equipment or who require a different single-board computer form factor cannot use this HAT.

Verify PoE injector or switch and case clearance

Confirm your network infrastructure delivers 802.3af-class power before ordering. The onboard fan and OLED module add vertical height, so ensure your enclosure provides enough space above the GPIO header. The fan can run automatically on power-up or be software-controlled via the I2C expander using a hardware switch.