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ESP32-S31-Function-CoreBoard-1

Posted: Wed Jun 03, 2026 3:37 am
by mikemoy
aliexpress, only had 25 in stock, and as you can imagine sold out quickly.
https://www.aliexpress.us/item/32568121 ... 4itemAdapt

When can we expect more in stock ?

Re: ESP32-S31-Function-CoreBoard-1

Posted: Sat Jun 06, 2026 12:15 pm
by bongjiajun
We expect them be available around mid~end June, stay tuned!

Re: ESP32-S31-Function-CoreBoard-1

Posted: Sun Jun 07, 2026 1:12 am
by rudi ;-)
We expect them be available around mid~end June, stay tuned!
Hi bongjiajun,

can you check missing parts please?
txs

Re: ESP32-S31-Function-CoreBoard-1

Posted: Thu Jun 18, 2026 12:08 pm
by bongjiajun
Hi Rudy,

Both components were intentionally left unpopulated to accommodate any potential future requirements:
Top left: corresponds to C10 (marked as NC in the datasheet)
Middle right: corresponds to R11 (marked as NC in the datasheet)

You may find the details here: https://documentation.espressif.com/esp ... eet_en.pdf

Re: ESP32-S31-Function-CoreBoard-1

Posted: Sat Jun 27, 2026 12:26 pm
by rudi ;-)
Hi everyone,

just wanted to let you know that there’s a lot more available for testing now.
As of yesterday, my workbench is sporting another highlight: the H16R16V variant. (ESP32-S31-WROOM-3)
We’ll see where things go over the next few weeks. I’m really excited.

The technical specs look like a real treat—it has everything you actually need.

This could be a real winner. Initial tests have already been very promising.
The "pre-final" retail version looks great (featuring a metal shield), and the packaging is incredibly classy, ​​too.
I haven't powered it up yet; I need to clear some space on my workbench first. It looks very high-end; the PCB is a sophisticated, double-sided design. The mounting holes are symmetrically balanced, offering plenty of flexibility for custom enclosures. Plus, the 40-pin header is compatible with the ESP-S3-LCD-EV-Board-SUB1, 2, and 3. The USB-A (2.0 HS-HOST) port opens up all sorts of possibilities. 1Gbps Ethernet—what a great time to be doing this. And it’s all based on RISC-V with an Sv32 MMU.
Guys, this is going to be huge!

NEG: It’s a shame that, for the moment, you can only buy one/buyer. It comes from the official Espressif store on AliExpress.
PRO: I got one :))))

Happy coding
best wishes
rudi ;-)

Re: ESP32-S31-Function-CoreBoard-1

Posted: Sat Jun 27, 2026 1:28 pm
by username
I got mine in the other day as well. I agree with rudi on the board.
My only concern is the Ethernet PHY IC they chose to use. I would have though they could/ should have use a more common Ethernet PHY IC. The one on my board is by far the hottest part on the whole board. I didn't do a temp reading, just the ole finger test and just sitting there without transferring and data it's very, very warm. So much so that I would be concerned about using it in the real world in an industrial setting.

I also noticed they did not use castellated pins on the ESP32-S31-WROOM-3 module. One one end i get it, but on the other it made it so easy for prototyping, and scoping pins.

Re: ESP32-S31-Function-CoreBoard-1

Posted: Sun Jun 28, 2026 3:44 am
by Sprite
I also noticed they did not use castellated pins on the ESP32-S31-WROOM-3 module. One one end i get it, but on the other it made it so easy for prototyping, and scoping pins.
FWIW, the -WROOM-3 has pads under the module, but the -WROOM-1 still has the castellated pins.

Re: ESP32-S31-Function-CoreBoard-1

Posted: Mon Jun 29, 2026 12:33 am
by username
FWIW, the -WROOM-3 has pads under the module, but the -WROOM-1 still has the castellated pins.
Oh, thanks for mentioning that. I just poorly assumed that -WROOM-3 was the latest, and -WROOM-1 was mor or less a prototype.