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The SOPine Clusterboard is a way to setup a compact cluster for low power usage and testing. It can hold up to 7 SOPine modules.

Although there is a PINE_A64-LTS/SOPine page already, this page will describe both the Clusterboard and the SOPine modules.

There is a user guide on the forum but sadly the images have disappeared.

While the Cluster board is an hardware open source project, please note that it does not mean this project is "OSH" compliant.


These are the specifications as mentioned in the project introduction: (spellchecked a bit)

  • Standard mITX Form-Factor (167mm x 170mm)
  • Built-In Unmanaged Gigabit Ethernet Switch - RTL8370N
  • 7x RTL8211E Gigabit Ethernet port, connected to the Switch
  • eMMC module Slot
  • 7x USB 2.0 (one for each module)
  • GPIO pins exposed for each module including UART
  • NIC LEDs for each SOPine Module
  • 2x 1.5V “AA” size Battery Holder for Real Time Clock Port (RTC)
  • +5V 15A power supply with 6.3mm OD/3.0mm ID barrel type DC Jack
  • ATX Power Supply Header


Clusterboard 2.3 Front annotated - image by abcde
Clusterboard 2.3 Back - image by abcde
Label Description
A 6.3mm OD/3.0mm ID barrel type DC Jack for +5V 15A 75W power supply
B Gigabit Ethernet Port
C Reset Button
D 2x 1.5V “AA” size Battery Holder for Real Time Clock Port (RTC)
E eMMC connector (only for 1st module)
F SOPine Module slot
G USB2.0 USB-A plug
H MicroUSB-B USB2.0 plug
I Activity LED
J 20-pin expansion connector
K Lithium Battery 3-pin JST connector
L RTL8211E Ethernet Port, with 2 status LEDs
M Unmanaged Gigabit Ethernet Switch - RTL8370N
N ATX Power Connector
O ATX PS_ON 2-pin JST connector
P HDD 5V Power (optional)
Q Resistor (optional, for use with the alternative powering options)

Parts F to L are duplicated for all 7 modules

20 Pin Connector

In the forum there is an image with the (likely) pinout.

SOPine Module

SOPine Front and Back annotated. Picture by abcde.
Label Description
A A64 SoC
C AXP803
D SO-Dimm connector
E mSD Card Slot
F (not annotated yet) Power LED


  • To operate this board you will need a power supply, Pine advises a "+5V 15A power supply with 6.3mm OD/3.0mm ID barrel type DC Jack" which is also available in the store (EU/US versions). There are other ways to power this board, but they are not described here yet.
  • The board works best when it is protected by a (mITX)case, and has some airflow provided by a fan.
  • Each SOPine module can use cooling, both by a casefan, and by using heatsinks on the individual modules. At least the A64 could use some cooling.
  • The first slot can use a eMMC module, which are in the store in 16GB/32GB/64GB/128GB sizes. The modules can be used as a USB stick using a USB adapter. (The eMMC is also readable with the Hardkernel eMMC to microSD converter.)
  • 2x AA batteries, to make sure every device gets the right RTC(Real Time Clock) information.


To install this cluster it is important to know which module has which IP address, so you can make sure you connect to the right board, esp with the module that has access to the eMMC.

You can plug in each module individually, and give them a separate name. After that is taken care of you will know which module is used for what. It would also be possible to manually edit each images hosts/hostname files before first boot.

The board has no hotplug functionality, so make sure you only plug/unplug the modules while the power is disconnected from the clusterboard.
As a unmanaged switch is used there is no VLAN support.

Operating systems


To get the cluster running, start off with a basic Armbian SOPine install on the first module or directly on all the modules. Armbian offers Debian and Ubuntu as options for download.

There is an issue recognizing the network that needs you to make a change to the base image described here, and a PXE issue. If you have a good description, please add it here.

There are a number of possible basic installation methods.

  • Full install on each module's mSD card.
  • eMMC install on the first module.
  • PXE boot for all modules, from the first module, or an external host.

Frequently asked questions

Q: Are the individual MAC addresses linked to the NIC, or the module. I would say the NIC, which would make it easy to make a list for future reuse, but i am unsure. The RTL8211E is actually not a nic but just the physical interfacing. Which seems to indicate the nic is part of the SoC and the MAC address is part of the module. Anyone can test it by swapping two modules and see if they notice the effect on the interface leds.

Schematics and other

Hardware revisions

The current version is 2.3. There was at least a 2.2 version, if there is more info, please add it here.