#open-hardware

drfailov's ESP32-S2 wearable runs for two weeks on a charge and leans on the unglamorous engineering — battery life, durability, backlighting — that most DIY smartwatch demos skip.

Daniel Ansorregui's ESP32 smartwatch pairs a built-in solar panel with e-paper and a clever RTC-memory boot trick to stretch run time to months.

The Openmovement foundation released complete STEP files for a serviceable Swiss-lever escapement movement, aimed at watchmaking schools and new makers rather than collectors.

Hansel Kay designed an ESP32-C3 smartwatch from scratch — PCB, power regulation, and firmware — as a platform other makers can build on.

Matthew James Bellafaire built an ESP32 smartwatch designed to put full control back in the user's hands, iterating through five hardware revisions to get there.