Rust Gdansk Meetup #8

We’re excited to invite you to our next Rust Gdańsk Meetup of 2025. Come join us for an evening of learning, inspiration, and great conversations with fellow Rustaceans. As always, there will be prizes, announcements, and plenty of chances to connect with the local community.

### When does my bus leave?

Speaker: Marcin Szymczak

Let’s embark on a journey to build an IoT device that shows real-time Gdańsk ZTM bus departures—powered by a Raspberry Pi Pico W and Rust, all the way down.

But there’s a twist: with only 264 KB of RAM, the Pico W can’t handle the massive JSON responses (600+ KB) from the API in one go. That means traditional parsers like `nom`, `winnow`, and `chumsky` just won’t cut it.

This talk, the first in a series, covers the design and development of a custom parser combinator library built to process streaming JSON on constrained hardware. It's a tale of limitations, creativity, and bare-metal Rust hacking.