xtensa-rust-quickstart VS rust

I made some experiments few months ago, with mild success. I cannot remember exactly what documentation/guide I followed, but it was probably the Xtensa Rust quickstart (or at least that should be a good start). I was able to compile a project that used pins, but I could not make wifi work (and I am using ESP8266 exactly because I need wifi).

Xtensa. They've got a fork of LLVM that supports it that they're working toward getting upstreamed. The community has a fork of rustc that uses it (and a quickstart crate) while we wait for it to get upstreamed.

In theory yes, the watchy has a standard esp32, and rust works on the esp32. https://github.com/MabezDev/xtensa-rust-quickstart https://mabez.dev/blog/posts/esp32-rust/

The esp-template issue might be this one: https://github.com/esp-rs/rust/issues/158. Try with --release or updating to 1.68.0 with espup update. I'll take a look at the log as soon as I can, atm Im on the phone and is not that easy to scroll through :(

Sure. Espressif maintains a fork which adds support for their microcontrollers.

I am trying to make a vaccine passport validation for my country using the ESP32 for my micro controller. I have gotten the std rust library to compile using (esp-rs)[https://github.com/esp-rs/rust], but the actual validation library that I use needs openssl which refuses to compile.

Xtensa. They've got a fork of LLVM that supports it that they're working toward getting upstreamed. The community has a fork of rustc that uses it (and a quickstart crate) while we wait for it to get upstreamed.

It only works if you have an Xtensa compiler which takes hours to compile, here: Rust Xtensa (if you don't have it). The network driver is just a function that sets the name of the driver so the Esp32 does something other that blinking.