@goose72  Do you realise that you just quoted a five years old post?

Yes there is one.

It's a 4-pin data cable.

You can see it in this Youtube video they have posted at their website.

Link: https://support.bitmain.com/hc/en-us/articles/360014800354-How-to-disassemble-control-board-from-your-Antminer-S15-T15-

Bitmain describes the APW8 power supply (which is the psu for S11, T11, S15, T15) as a 16 - 18 V_DC power supply.
I think that this means the controller board is able to control the psu output voltage fed to the hash boards.

Ouch.

Is Bitmain not selling any spare APW8 psu's?

It seems that you might have two bad condition hash boards.

Do you still have warranty for that T9+?

Make a support ticket at Bitmain website.

I got the shipping notice today.

I have not given them any KYC data (passport etc.) they have been asking,
yet still I managed to get my order through.

I paid via bank transfer.

Yep,
wifi repeaters is the way to go.

You can also see if "wireless mesh" would be ideal for you.
https://en.m.wikipedia.org/wiki/Wireless_mesh_network

And also powerline ethernet is one option.
https://en.m.wikipedia.org/wiki/Power-line_communication

I have ordered one S15 from Bitmain and I will do a review when I receive it.

Rasp Pi needs a 5 V_DC,  2.5 A  'wall wart' power supply.

I haven't seen any of their hardware out there in the field.

And it looks like they changed the S15 price back to 1.2k USD.  

No coupon was sent to me.

Dang, I knew I should had wait a bit.

I paid 1.2k USD for the S15 (27Ths  Jan. 11-->)
and now they dropped the same batch price to 1k USD.

Fuck.

Wow, the power efficiency number for the low power mode is pretty nice.

And it is 16nm tech..!

You don't have to worry about the discarded number,
it doesnt matter

Scott you picked wrong people to team up with

Lol these are not worth that much anymore.

Did they delete this comment in the video comments section? I can't see it.

Indeed this is too good to be true.

I say it is fake, until proven otherwise.

I'm tired of these.

But I hope you get a demo Phil, then those guys would prove me wrong.

Did you update both openwrt for the rasp pi and mm for the A921?

I bought one S15 from this batch to test it out,
not sure if I will have a place for it in long term.  

Maybe my friend who lives in a student apartment can help me out,
if it is not too loud in the low power mode.

But what I've seen in videos so far,
it seems that the psu can be quite loud.