ScienceHackadayabout 1 hour ago
HYDR8 Wearable Tracks Hydration
2 min read
HYDR8 is a wearable built on a XIAO ESP32-C3 that reads heart rate and oxygenation to detect when the wearer needs water. It was created to prevent headaches from dehydration during deep work sessions. Phone reminders were dismissed as annoying.
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