VisionFive 2 and PoE

Reading VisionFive 2 - open source quad-core RISC-V dev board by StarFive Tech — Kickstarter it says that PoE is supported but requires a separate poe hardware module - does this mean something like a hat (like how it is with the raspberry pi 4), or just a poe supply?

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Yes, it’s a 4-pin PoE header, with a PoE hardware module, you can connect and power the VisionFive2 with just one network cable。

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Would a PoE+ HAT that was designed for a Raspberry Pi 3 Model B+ and later models work ? The positioning of the 4-pin PoE header in your image above looks to have the exact same placement as the J14 header on a RPi 3B+.and later models relative to the 40 pin GPIO header.

The original RPi PoE HAT modules were Type 1:
12.95 Watt at powered device 802.3af (802.3at Type 1), PoE
The current RPi PoE+ HAT modules are Type 2:
25.50 Watt at powered device 802.3at Type 2, PoE+
Does the VisionFive 2 board require more power:
51 Watt at powered device 802.3bt Type 3, 4PPoE or PoE++

The kickstarter website says that 5V DC @ 3+ amps (15+ watts) are required if powered through the GPIO pin(s). But it also says that up to 30 watts are required if powered through the USB-C connector.

My questions are:

  1. Would a current RPI PoE+ HAT module (Type 2) work on a VisionFive 2 board ?
  2. Or is a different PoE module (e.g. Type 3) required for a VisionFive 2 board ?

VisionFive 2 is designed to be compatible with Raspberry Pi and can be used in theory, but has not been tested yet.


Interesting, is this the same as the VisionFive1? I have a spare Raspberry Pi 4 PoE hat (gen 1) that I could test it on.

Yes, there is also this POE header on VisionFive1, maybe you can try it.

Hey @balupton, did you test the PoE HAT? What are the results?

Didn’t test as was concerned about the original poe hat which is what I have not providing enough power and potentially damaging the board.

More to come, but the VisionFive2 just passed the smoke test with the Raspberry Pi PoE+ hat. LEDs lit, and the network port came online. More to come later. I’ll try to update here, and watch Hackaday for a full review including the PoE hat.


Hat works nicely so far with the “outer” LAN port. However, the fan is not spinning/cooling the chips.

It is controlled over i2c, on the rpi it’s dtoverlay=rpi-poe-plus and the code that controls it is in rpi-poe-fan.c