2 Rock Pi S HW Qs

I was reading the wiki and advertisement about the Rock Pi S and could not find information on a few things. Perhaps there’s someone more familiar with it that can clarify, otherwise I’ll have to ask the devs.
1: The RPI S has a realteck audio controller, does it have a Mic?
2: The RPI S has 2 26pin headers. I check wikipedia for the Raspberry Pi layout, but can’t tell (you’ll have to forgive me here the naming schemes appear to be different), is one of the RPI S’s 26pin headers compatible with the RPI 26pin layout?



The way I took it there is a 40pin one side that is RPi compatible and the other side is 2 x 26 pin special purpurpose I/O where there isn’t a Mix there are 8x of them.


Its an alexa / google home / on a board with a multi array microphone that you need to supply microphones for.

I am just starting with my v 1.1 board using the header 1
in particular the i2c1 pins (3 and 5) and the uart0 pins (8 and 10)

One item that is obvious … the board layout in https://wiki.radxa.com/RockpiS
has the wrong color orientation for header 1, the shipped boards fortunately
have the color coded headers since there are no identifications printed on the pcb

EDIT- I verified the yellow v 1.1 boards do have the +5 on the red colored header pins
in accordance with the picture below. I do not have a black v 1.0 development board to verify it’s header pin layout

no pin numbers are identifiable on header 2

no help with https://dl.radxa.com/rockpis/docs/hw/ROCK-PI-S_v10_reference_20190323.pdf

@stuartiannaylor That was a very confusing reply.
The RPi S has 2x26ping connectors, not a 40pin one. And as there are some RPIs that do use a 26pin connector, I’m trying to find out if the RPi S is compatible.
I did not talk about Alexa/google home/etc. I asked in general if there was a mic. For example, the RK3399 board from rockchip has a mic on the SBC.

It has 8 mics

https://wiki.radxa.com/RockpiS/hardware/rockpiS read the manual then if replies confuse :slight_smile:)

Its has a pi compat 26 the color coded one.
Other connector side there are 8 microphone inputs

@stuartiannaylor Thanks for your reply. I did say in the beginning that I tried to verify the 26pin against the RPI, but the labels were different, and I was uncertain if it was merely a name change or an actual electrical difference.

As for the mics I’m used to them being labeled as mic1, mic2, etc… The naming scheme chosen is micn1 micp1, micn2 micp2, etc. I could have guessed that if I had read the schematic, but I’m used to simple circuits and was feeling a bit overwhelmed.

If you’d like to point me to a getting-started-with-weird-schematic-abbreviations article I’d be happy to read it and become smarter.

Thanks again!

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Two additional HW questions:

  • could you publish schematic/placement of V 1.1 ? There seem to be a few differences.
  • Why is POE not supported on all variants? Is it just the missing pin header or is there something else? A different RJ45 jack w/o center tap? I don’t need Wifi/BT but would really like the POE option.

Regarding the POE: just had a closer look at the board (512 MB, no Wifi/BT) and the RJ45 jack is missing two pins. Therefore it won’t be able to use POE with this board. But the RJ45 jack could be exchanged manually… :wink:

You can find the schematic for all the versions here:


We have updated.

Please describe the v1.2 changes from the version 1.1
I have been testing my v 1.1 and continue to interested in this mini .

Check the hardare revision page on the wiki:


  • Change resistor R9608 R90304 value to reduce brightness of LED

Thank you @jack and Radxa Team! :smile:

Could you also change R9607 to be 1K instead of 470R or is the preparation for production finalised?
Blue LED is normally not lit but when it is, it is brighter than the one in Rock Pi 4 (v1.4) which uses 1K as resistor.

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I need to check with the hardware engineer. Indeed it was bright before.

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