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13727 :: Nebble v1.0 - Full-Stack Nim for Pebble Smartwatches

• Brokezawa (orginal) [2026-02-16T20:10:31+01:00] view original

  Hi everyone !

  Following my desire to use Nim on everything, I've made another wrapper ! This one should be more stable as the low level bindings are generated using Futhark and I have been able to throughly test it thanks to Pebble emulators.

  I'm excited to share the v1.0 release of Nebble, a comprehensive Nim wrapper and toolchain for the Pebble smartwatch SDK. While Pebble development traditionally requires a mix of C for the watch and JavaScript for the phone-side component, Nebble allows you to stay entirely within Nim. It leverages Nim’s multi-backend support to provide a unified "Full-Stack" experience:

  • Watch Side: Compiles to optimized C (Cortex-M3) using ARC and Managed Handles to eliminate manual _destroy calls.
  • Phone Side: Compiles src/pkjs.nim to JavaScript, allowing you to share enums, message keys, and logic between the watch and the phone with 100% type safety.

  Key Features:

  • Declarative UI DSL: A nebbleApp macro that reduces UI boilerplate to a clean, readable block.
  • Zero-Heap Utilities: Includes FixedString and heap-free formatting to avoid RAM fragmentation on devices with as little as 24KB of memory.
  • Modern CLI: A dedicated nebble tool that handles the complex multi-platform build matrix, package.json generation, and deployment.
  • Complete Coverage: High-level idiomatic wrappers and low-level FFI for all 6 Pebble platforms (Aplite to Flint).

  If you still have a Pebble or a bought a new one, now is a great time to pull it out and try building something with Nim!

  GitHub: Nebble

  Feedback and PRs are welcome!

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