I have really enjoyed the ESP32-C3 (https://www.espressif.com/en/products/socs/esp32-c3)

I have written a few posts that may help you get started with it: - https://danielmangum.com/posts/risc-v-bytes-exploring-custom... - https://danielmangum.com/posts/risc-v-bytes-zephyr-on-esp32/ - https://danielmangum.com/posts/risc-v-bytes-zephyr-before-ma... - https://danielmangum.com/posts/risc-v-bytes-semihosting-zeph...

WCH has a bunch of new ones that have come out recently, like the CH32V003 and CH32V307 [1]. I would start there, they are close enough and could probably run micropython since they have some that have reasonable amounts of SRAM.

I think they are mostly looking to replace STM32s though.

[1] http://www.wch-ic.com/products/CH32V003.html

This is really cool. This is riscv running under wasm in your browser and else where. Paired with a web repl and some JS peripherals, should should probably be the top answer.

This is much more usable, Full Fedora, with everything you'd expect:

https://bellard.org/jslinux/vm.html?cpu=riscv64&url=fedora33...

I don't know why this comment was dead. Pine64 is legit and the Star64 looks like a viable option.

Anyone with experience on the Star64? I've had some rough times in the past with Pine64 products, from boards dying to the pinebook pro suddenly unable to boot from sd card. Better documentation would have helped. I didn't have hours to comb through forums and discords/matrices.

Still have a major warm place in my heart for Pine64 though, and overall have felt like they're a good value.

I guess the question was about board with specs similar to Pi Pico (~264kB of RAM) and the Star64 is more similar to RPi4 (~4GB of RAM).

Right, the Star64 is like the full-size Pi; the equivalent to the Pico would be the Ox64 line.

I've been happy with my mango pi mq pro, but that might be more powerful than what you are looking for. It's very similar to the raspberry pi zero w.

Probably the closest to a Pico in terms of being symmetrical would be the $9 Milk-V duo with two 1 GHz C906 cores (with vector units), and 64 MB RAM. It's obviously far more powerful than the Pico. And isn't available outside China yet.

Taking a step down to things that are actually available, the Sipeed M1s Dock and Pine64 Ox64 use the BL808 chip which has one 320 MHz 32 bit core, one 480 MHz 64 bit core (with vector processor), and a 3rd smaller 32 bit core that is intended to be dedicated to running the WIFI/BT. This chip also has 64 MB of on-chip RAM. The Ox64 is $6 or $8 depending on how big a flash chip (2 MB or 16 MB) it has. The M1s is a little more.

Going back to 2019, the Kendryte K210 chip has two 400 MHz 64 bit cores and 8 MB of RAM. There have been a ton of boards using it, especially from Sipeed but it's a bit more expensive than the newer chips.

There are tons of cheaper boards, but they tend to be single core and only a few KB to few hundred KB of RAM.

You of course want to go with RUST + RISCV

https://www.mouser.com/ProductDetail/Espressif-Systems/ESP32...

ESP32-C3-DevKit-RUST-1

$21 shipped from Mouser.

https://github.com/esp-rs/esp-rust-board

I'm using the StarFive VisionFive 2 and its working quite well, there are debain and ubuntu images available as well as some other distributions, generally most of the boards features are working fine and there is a community around it actively improving software support.

For your requirements it might be a bit overkill in performance as its more in the neighborhood of a RasperryPi 3/4 in terms of size, power consumption and performance.

Esp32-C3.

Arduino, micropython, rust, and bog standard C/C++ are all well supported.

BLE/Wifi support, dev boards < $5usd are common.

https://www.espressif.com/en/products/socs/esp32-c3