ESP32-S31: 320MHz 2C RV32IMAFCP+CLIC, 512KB SRAM, GbE, 802.11ax, 61 GPIO
by topspin on 3/29/2026, 9:39:23 AM
https://www.espressif.com/en/news/ESP32_S31_Release
Comments
by: Lwrless
I'm puzzled by Espressif's naming here. We had the ESP32-S3, so "S31" sounds like "S3, variant 1," but this part doesn't really look like a simple S3 variant. And then there's an ESP32-E22, but no E21 or even a plain E2 anywhere.<p>Edit: found an article explaining some of their naming logic, and said that the SoC naming will get its follow-up article, but sadly it never happened. <a href="https://developer.espressif.com/blog/2025/03/espressif-part-numbers-explained/" rel="nofollow">https://developer.espressif.com/blog/2025/03/espressif-part-...</a>
4/3/2026, 9:18:27 AM
by: Rochus
They claim that the chip has an "MMU". But unfortunately this doesn't seem to be a true RISC-V MMU (according to the Sv32 specification) integrated into the CPU core itself, but just a peripheral designed for memory mapped SPI flash and PSRAM. So as far as I understand there is no true process isolation with page faults and dynamic paging.
4/3/2026, 9:40:37 AM
by: moepstar
I believe this is the first ESP to gain Ethernet capability?<p>I totally wish that a board would come with PoE…<p>Because as it is right now, powering a fleet of those with USB power supplies is annoying as fsck…
4/3/2026, 9:02:37 AM
by: urba_
I don’t trust Espressif’s releases, I am still waiting for ESP32-P4 to hit distributors. It is now more than 2 years and 3rd chip revision
4/3/2026, 10:32:52 AM
by: volemo
How do Espressif’s RISC-V cores compare to existing ARM or RISC-V options in terms of power efficiency (computational power / electrical power)?
4/3/2026, 10:26:14 AM
by: MrBuddyCasino
> high-speed 250 MHz 8-bit DDR PSRAM with concurrent flash and PSRAM access<p>This is perhaps lost in the noise but IMO a large deal. PSRAM starting to get serious bandwidth.
4/3/2026, 10:53:08 AM
by: amelius
Does it run Linux?
4/3/2026, 10:40:46 AM
by: ricardobeat
I hope this one has multiple radios so you can actually use BT/Wifi/Thread simultaneously.
4/3/2026, 9:58:07 AM
by: bestouff
Is there something that match those elsewhere ?
4/3/2026, 8:41:58 AM
by: wosined
The ESP32 boards I own have bad support and are a bit of a hit and miss. (arduino nano esp32) Did this get better? Or is the support still messy?
4/3/2026, 9:22:11 AM
by: logicallee
Roughly how much do you think this costs?
4/3/2026, 9:15:47 AM