IdeaWell

Project ideas from Hacker News discussions.

A programmable watch you can actually wear

Original Article

Hacker News Discussion

📝 Discussion Summary (Click to expand)

Top 3 Themes

  1. Pre‑orders sold out & affordable pricing

    “LILYGO site shows pre‑orders of all 3 versions are sold out unfortunately.” — HardwareLust The community notes that the Ultra is priced low enough to attract a large market, and the older “Plus” model is already available cheap on Amazon.

  2. DIY/open‑source smartwatch movement

    “It's impressive you start with a lathe and make the movement yourself!” — Avicebron
    Many users highlight the appeal of building watches from kits, PCB, or even from scratch, contrasting the hobbyist freedom with the tightly locked Garmin/Apple ecosystems.
    “The underlying Garmin platform is so old that it predates iPhone/Android… you can plug in many Garmins via USB without any special software.” — jerlam

  3. Battery life & power‑efficiency concerns

    “I would not expect years at all. You gotta be very careful about what has to stay on and off.” — shadowpho
    Discussions repeatedly focus on the poor deep‑sleep performance of ESP32‑based watches, the need for better SoCs (Nordic, STM), and the trade‑off between feature richness and real‑world runtime.

These themes capture the current buzz: limited supply but low price, a thriving DIY/FOSS smartwatch scene, and the ongoing struggle to achieve long battery life in compact, feature‑rich wearables.

🚀 Project Ideas

Modular Low‑Power Open‑Source Smartwatch Kit

Summary

  • A snap‑in smartwatch kit that combines a low‑power MCU, interchangeable sensor boards, and a memory‑in‑pixel or e‑ink display, directly addressing the HN demand for affordable, community‑driven hardware with open firmware.
  • Solves the twin frustrations of short battery life and closed‑source ecosystems reported by hobbyists.

Details

Key Value
Target Audience Open‑source hardware hobbyists, makers, and low‑power IoT enthusiasts seeking a customizable smartwatch.
Core Feature Modular base PCB (STM32WB5MMG or nRF52840) with hot‑swap sensor slots and a 2.13" MIP display for always‑on readability.
Tech Stack MCU: STM32WB5MMG / nRF52840; Firmware: Zephyr RTOS; Build: PlatformIO; Display: 2.13" 250×290 MIP; Connectivity: I2C, BLE.
Difficulty Medium
Monetization Revenue-ready: Hardware kit $45 + optional sensor modules $10 each.

Notes

  • Directly responds to comments like “I’d love a DIY smartwatch with zero AI and e‑ink” and “no FOSS firmware for Garmin‑like watches.”
  • Provides a clear upgrade path from existing DIY watches while preserving the rugged aesthetic many community members value.

Open‑Source Garmin‑Lite Map & Sync Service

Summary

  • A free, community‑maintained web service that builds offline maps and syncs activity data for legacy Garmin and open‑hardware watches, filling the gap highlighted by users who “lack FOSS software to sync a new map onto it.”
  • Delivers a practical utility that complements any DIY or kit‑based watch.

Details

Key Value
Target Audience Owners of older Garmin watches, retro‑watch tinkerers, and developers who want a self‑hosted sync backend.
Core Feature Web UI to generate custom map tiles for supported watch formats and a REST API for firmware to upload activities without proprietary connectors.
Tech Stack Backend: Python FastAPI + SQLite; Frontend: React; Hosting: Docker on Fly.io; Storage: Cloudflare R2; CI: GitHub Actions.
Difficulty Low
Monetization Hobby

Notes

  • Echoes HN sentiment: “I have a garmin from the late 90s and am saddened by the lack of FOSS software to even sync a new map onto it.”
  • By providing an open‑source alternative to Garmin Connect, the project encourages broader adoption of DIY watches and sparks discussion about open data standards.

Low‑Power Always‑On E‑Ink Smartwatch Service Platform

Summary

  • A SaaS platform that offers one‑click flashing of ultra‑low‑power firmware, automated battery‑budget reports, and a marketplace for community‑created watchfaces and sensor integrations, tackling the recurring HN complaints about poor battery life and random crashes.
  • Provides a turnkey solution for users who want an always‑on E‑Ink smartwatch without deep embedded expertise.

Details

Key Value
Target Audience DIY smartwatch builders and end‑users of open‑hardware watches (e.g., LilyGO, PineTime) who lack time to fine‑tune power consumption.
Core Feature One‑click deployment of validated power‑optimized firmware profiles; auto‑generated power‑budget analytics; marketplace for community apps and watchfaces.
Tech Stack Firmware: FreeRTOS / ESP‑IDF or nRF5 SDK; Backend: Node.js + PostgreSQL; Frontend: Vue.js; Deployment: Vercel serverless; CI: GitHub Actions.
Difficulty High
Monetization Revenue-ready: Subscription $4/mo for cloud build credits and premium analytics.

Notes

  • Addresses repeated concerns such as “battery life is a mess” and “random crashes that happen with sleep.”
  • By curating vetted power‑optimization configs and simplifying app distribution, the service fuels community discussion and lowers the barrier to entry for hobbyist smartwatch projects.

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