ESP32-S31

rie_t

Love to see more RISC-V in the wild

randomint64

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.

Imustaskforhelp

The 1GB bandwidth is interesting. It also has Simd instructions too. Could this theoretically be used as a router or wireguard vpn instance?

jeremywho

When can we buy these?

Aurornis

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.

skybrian

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?

frikk

I've been building hobby LED art projects with WLED (exclusively built on the ESP32 platform). It's been a blast. These little boards are so powerful and the open source community continues to amaze me. My preferred controller platform is of the QuinLED line - comes with power distribution, voltage regulators, fat copper lines, configurable data-line resistors, and smart auxiliary hardware support all for an affordable $30-$50 per controller. (quinled.info) < https://kno.wled.ge/ > - WLED homepage and probably my favorite clever URL of all time.

oritron

The specs look great, will see how long it takes to get these as WROOM modules or on little dev boards; my two form factors of choice for Espressif devices. I'm also curious about the pricing, so far they've impressed me with how much more you get in successive generations at a similar price. If you're excited about the (relatively) speedy RISC-V cores and SIMD, look at the P4 which is available now. It has a slightly faster clock but no wireless: https://products.espressif.com/#/product-comparison?names=ES... There's some cool work out there using the dsp functionality and built in image handling to crunch a lot of pixel data, which should work similarly on the S31: https://www.reddit.com/r/WLED/comments/1ry2jd7/wledmmp4_with...

nubinetwork

This looks like a nucleo144, except its risc-v... but why would I use it over said nucleo144?

hart_russell

Any reason why this device wouldn't have Z-Wave? Is the wireless protocol significantly different than Thread and Zigbee?

orphea

It being RISC-V is awesome, but how does it make sense that it's S series when S series have been Xtensa cores? Why is it not C series?

mort96

This looks like the long-awaited replacement for the original ESP32. The S and C series have been relatively low performance (the S better than the C but stuck on the outgoing Xtensa architecture), the P4 is powerful but lacks wireless. This is a relatively high performance, dual core MCU with wireless; a nice default option for low volume designs where being able to copy a previous implementation is more important than saving a few cents. Just like the ESP32. Nice.

zuzululu

How do I order a few samples, seem like there is a MOQ ? Also I want to dive into hardware stuff but I'm always clueless as to what I do afterwards when this would arrive? Are you using a generic board or are you ordering and designing PCBs to hook this up to? What are you using it for ? How do I go from a prototype to mass production via kickstarter?

jml7c5

Previous discussion from two months ago, when this was announced: https://news.ycombinator.com/item?id=47561678

topspin

I'm excited that this MCU and the P4 has RISC-V CLIC. That puts it at least on par with Cortex NVIC and enables bare metal frameworks like Rust RTIC to work really well. Also 4x MCPWM peripherals; that's a first for any Espressif MCU. The additional GPIOs are very welcome as well. CAN-FD! This device is going to be a big hit for Espressif.

kjlldld

Is anyone else worried that these chips are all made in China?

alnwlsn

I kind of wish these all weren't called ESP32. ESP8266 and ESP8285 -> ESP32 made sense, but now we have 10+ different versions with different features and different architectures. Kind of like how in every thread involving a Raspberry Pi Pico (RP2030/RP2350), there's always someone confusing it with the single board computer version. The ESP32 (Classic, usually WROOM-32E) is still usually what comes to mind when I hear ESP32.

thehk

> ESP32-S31 is particularly well suited for edge AI and machine learning workloads, including neural network inference Any way to know what kind of performance one could expect running e.g. a depth anything model on there?

system2

I wish Espressif was an American company and publicly traded. I'd invest heavily. I have nothing but good things to say about their products. Their product naming could be better; S3 is going to show S31 in the search results.

lucamark

Great to hear the adoption of RISC-V across the ESP32 line. The old Xtensa-based parts were fine, but RISC-V should make tooling, compiler support, and long-term ecosystem work cleaner