Raspberry Pi 5 uses PCIe hat/dual hat | Seeed Studio Wiki

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Raspberry Pi 5 uses PCIe hat/dual hat | Seeed Studio Wiki

This tutorial mainly introduces the hardware connection configuration of M.2 Hat and dual Hat and how to make the Raspberry Pi boot from the SSD.

https://wiki.seeedstudio.com/raspberry_pi_5_uses_pcie_hat_dual_hat/

[pop-aruaru]

Why size of screws are not noted?
I want to know when attach more expansion board.
M3 , M2.5 or inch pitch.

[LJ-Hao]

Here is the size of screws.

[pop-aruaru]

I wanted to know about the screws used to stack HAT. This is because the nut is fixed to the board and cannot be replaced. I already bought it and know that it can be fixed with M2.6. M2.5 might also be good. However, this is information that should be provided by the supplier.

[pop-aruaru]

I forgot to thank you. However, your information is about the screws that fix the SSD, which is not what I was looking for. Also, it is provided by the manufacturer, so there is no need for me to prepare it.

[LJ-Hao]

Here you are:

[pop-aruaru]

You understand that you need to include the screw information, and I don't use plastic screws that can break off. If so, please include it in the HAT documentation so I can remove my comment.

[panyajan]

After boot error pcie unable to charge power state from D3cold to D0 device inaccessible

[LJ-Hao]

Please make sure Hat's pogo pin connect with Pi5 GPIO pad.

[pop-aruaru]

I think that the 5V is taken from the pogo pins to create the voltage used by the SSD board so that this board does not become unstable even if the 3V current that the Pi5 can supply is insufficient. Therefore, I think that it will not work unless the pogo pins are firmly in contact with the Pi5. It is better to tighten the screws firmly. However, since it is a plastic screw, it is moderate.

[inguyenanh]

Hi ,
I am error on boot pcie unable to charge power state from D3cold to D0 device inaccessible.
My NVME is CRUCIAL PCIe 3.0 2T

[nfs0619]

Hello @inguyenanh ,

Please make sure that the HAT's pogo pins are properly connected to the Pi5 GPIO pads. If the issue persists, I recommend reaching out to our technical support team at [email protected] for further assistance.

Let us know if you need any more help!

[inguyenanh]

Hello nfs0619,
Thank you for answering me, how can I find Hat's pogo pin? and how do I connect them ?
Best regards

[LJ-Hao]

Please follow this link:https://wiki.seeedstudio.com/raspberry_pi_5_uses_pcie_hat_dual_hat/

[inguyenanh]

I think your wiki is for PCIE2.0 Dual HAT. I recently bought a PCIE3.0 Dual HAT. I used this wiki, but it doesn't work.
I discovered by chance that if I boot with an old SD card with RPI OS date 2024-10-08, it works. If I type lsblk, I see the PCIE3.0 card with the NVME disk.
If I updated my SD card with sudo apt update && sudo apt upgrade, I rebooted Raspberry Pi, and then I typed lsblk again. I lost the NMVE disk. At this point, I checked that the OS version of my SD card is RPI OS date 2025-03-19. After several days of searching, I found a compromise:

• I copied a new SD card with RPI Imager (in this case, my RPI OS version is 2024-10-08) and booted my RPI with PCIE3.0 Dual HAT from this SD card. During boot, RPI OS asks you to update, click SKIP, and RPI OS boots with version 2024-10-08.
• Under RPI OS, open a terminal, update the bootloader with: sudo rpi-eeprom-update, and without rebooting, modify the eeprom configuration: sudo rpi-eeprom-config --edit, add PCIE_PROBE=1 at the end, and save the file. - Still under RPI OS, type: sudo nano /boot/firmware/config.txt
  Add these lines to the end of the file:
  dtparam=pciex1
  dtparam=pciex1_gen=3
  dtoverlay=pciex1-compat-pi5,no-mip,mmio-hi
  and save this file (mmio-hi is very, very, very important).
• Now you can update RPI OS with:
  sudo apt update && sudo apt upgrade. After the update, you can reboot your RPI, still with an SD card.
• After booting, under terminal, type: sudo uname -a to check if the RPI OS version has been changed and lsblk if your NVME is still there. - If everything is OK, copy the SD card to the NVME drive using the SD CARD COPIER utility (if you use this method, the SD card's config.txt file will be copied to the NVME drive).
  Remove the SD card, and reboot will be on the PCIE3.0 dual HAT card's NVME drive.
  The benchmark I ran is twice as fast as the benchmark on your wiki, because it's the real PCIE3.0 dual HAT benchmark.
  I hope this helps.

[nfs0619]

Thank you very much for sharing your experience and the detailed steps! We'll refer to your method for testing and verification. This information is very valuable for us and other users as well. Thanks again for your feedback!

[inguyenanh]

Hi,
The reason why iIset this mmio-hi parameter to workaround the problem of lost NVME drive on boot behind the brigde ASM2806, this is the explain:
raspberrypi/linux#6278 (comment)
I hope this help.

[Henry-Hyunkyu-Lee]

I’m trying to configure the Raspberry Pi 5 with the following setup:
– GS camera (MIPI CSI)
– Official Raspberry Pi Touch Display (MIPI DSI)
– Seeed Studio M.2 Dual HAT with SSD and HALIO8

I understand that enabling PCIe using the overlay dtoverlay=pciex1-compat-pi5,no-mip,mmio-hi disables the MIPI CSI and DSI ports due to the no-mip parameter.

Is there any way to use PCIe devices (SSD and HALIO8) and keep MIPI CSI/DSI enabled at the same time on Raspberry Pi 5?

[inguyenanh]

Hi,
You can remove no-mip, keep dtoverlay=pci1-compat-pi5,mmio-hi, that boot on PCI3 with NVME +HALI08 no problem.

[rtheobald]

I've installed an Aquantia/Marvell AQC107 10GE M.2 network adapter along with a Fanxiang 500GB NVME with this and it seems to be working fine.

-[0001:00]---00.0-[01-06]----00.0-[02-06]--+-00.0-[03]----00.0  MAXIO Technology (Hangzhou) Ltd. NVMe SSD Controller MAP1202 (DRAM-less)
                                           +-02.0-[04]--
                                           +-06.0-[05]--
                                           \-0e.0-[06]----00.0  Aquantia Corp. AQtion AQC113 NBase-T/IEEE 802.3an Ethernet Controller [Antigua 10G]

Iperf3 shows it transmits/receives at around 5.5-6 Gbps

I did have to update the Pi5 firmware and am running Ubuntu 25.04.

It runs really toasty, though that is no fault of the dual hat. Thinking of replacing the passive cooler on the network M.2 adapter with an active one.

[naturalv8]

does this dual hat support dual hailo8? not installing any ssd.

[nfs0619]

Hi, theoretically it should support dual Hailo-8, but we haven’t tested this setup yet.