ESP32-S31

#1

Post by volemo » Wed, Jun 03, 2026, 4:10 PM UTC

ESP32-S31
espressif.com

Re: ESP32-S31

#2

Post by rie_t » Wed, Jun 03, 2026, 4:25 PM UTC

Love to see more RISC-V in the wild

Re: ESP32-S31

#3

Post by randomint64 » Wed, Jun 03, 2026, 4:29 PM UTC

Espressif is on fire! And the CPU even has SIMD instructions!

RISC-V cores is a big deal for embedded systems because now compiling for SoCs is only a matter of `rustup target add riscv32imac-unknown-none-elf` instead of downloading half-broken proprietary toolchains and SDKs.

Take a look at https://kerkour.com/introduction-to-embedded-development-wit... and https://kerkour.com/rust-esp32-pentest to get started with modern (Rust ;) embedded development.

Re: ESP32-S31

#4

Post by Imustaskforhelp » Wed, Jun 03, 2026, 4:31 PM UTC

The 1GB bandwidth is interesting. It also has Simd instructions too.

Could this theoretically be used as a router or wireguard vpn instance?

Re: ESP32-S31

#5

Post by jeremywho » Wed, Jun 03, 2026, 4:49 PM UTC

When can we buy these?

Re: ESP32-S31

#6

Post by Aurornis » Wed, Jun 03, 2026, 4:49 PM UTC

Good to have WiFi and wired ethernet on the same part again.

Although we lost the MIPI support that the P4 dual-core RISC-V line has.

Re: ESP32-S31

#7

Post by cassepipe » Wed, Jun 03, 2026, 4:53 PM UTC

randomint64 wrote: post #3

Espressif is on fire! And the CPU even has SIMD instructions! RISC-V cores is a big deal for embedded systems because now compiling for SoCs is only a matter of `rustup target add riscv32imac-unknown-none-elf` instead of downloading half-broken proprietary toolchains and SDKs. Take a look at https://kerkour.com/introduction-to-embedded-development-wit... and https://kerkour.com/rust-esp32-pentest to get started with…

Curious: What does the "imac" stand for in the architecture target name ?

Re: ESP32-S31

#8

Post by Scene_Cast2 » Wed, Jun 03, 2026, 4:53 PM UTC

jeremywho wrote: post #5

When can we buy these?

The dev boards are already up for sale. I'm personally looking forward to the modules being stocked on LCSC, no idea when though.

Re: ESP32-S31

#9

Post by tosh » Wed, Jun 03, 2026, 4:54 PM UTC

randomint64 wrote: post #3

Espressif is on fire! And the CPU even has SIMD instructions! RISC-V cores is a big deal for embedded systems because now compiling for SoCs is only a matter of `rustup target add riscv32imac-unknown-none-elf` instead of downloading half-broken proprietary toolchains and SDKs. Take a look at https://kerkour.com/introduction-to-embedded-development-wit... and https://kerkour.com/rust-esp32-pentest to get started with…

very interesting, do you have a pointer with more info on what kind of SIMD support it has?

Re: ESP32-S31

#10

Post by skybrian » Wed, Jun 03, 2026, 4:56 PM UTC

I'm interested in audio out because I dabble in musical instruments.

What's the state of Bluetooth audio out on microcontrollers? Is low latency and high quality output possible?