Waveshare PoE HAT (B) for Raspberry Pi 3B+/4B

The Waveshare PoE HAT (B) lets you power and network a Raspberry Pi 3B+ or 4B over a single Ethernet cable. Plug it onto the Pi's 40-pin GPIO header and PoE header, connect the Pi to an 802.3af-compliant PoE switch or injector, and there is no need for a separate power supply – ideal for network appliances, cameras, sensors and Pi installations where a mains plug is not close by.

A built-in 0.91-inch OLED shows the processor temperature, IP address and fan status in real time, and the onboard cooling fan can either run automatically on power-up or be controlled by software according to CPU temperature.

Key Features:

• IEEE 802.3af-compliant Power over Ethernet (802.3af power sourcing equipment required)

• Fully isolated switched-mode power supply (SMPS)

• 0.91-inch white OLED (128 × 32, SSD1306, I2C) for temperature, IP address and fan status

• Onboard cooling fan with switch: run on power-up or programmable control

• PCF8574 I2C IO expander: P0 controls the fan, spare IO on solder pads (P1–P7, INT)

• Standard Raspberry Pi 40-pin GPIO header

Specifications:

• PoE input: 37V – 57V DC

• Output to Raspberry Pi: 5V 2.5A DC

• Network standard: IEEE 802.3af PoE

• Dimensions: 65.0 × 56.5 mm

Compatibility:

• Raspberry Pi 3 Model B+ and Raspberry Pi 4 Model B (boards with the 4-pin PoE header)

• Not suitable for the Raspberry Pi 3 Model B (no PoE header) or the Raspberry Pi 5

• Requires an 802.3af PoE switch, router or injector

What's in the Box:

• 1 × Waveshare PoE HAT (B)

• 1 × Standoff pack