HYDR8 Will Lead You To Water, But Will You Drink?

A hobbyist built HYDR8, a wearable powered by a XIAO ESP32-C3 that monitors heart rate, blood oxygenation, skin temperature, and ambient temperature and humidity to compute a heat/hydration stress score from 0-100. Rather than generic reminders, it tells the wearer specific actions like 'drink water' or 'find shade.' The device pairs with a phone-hosted dashboard served from the ESP32 and is explicitly a prototype, not a medical device—it estimates hydration stress rather than actual hydration levels.

Source: https://hackaday.com/2026/08/19/hydr8-will-lead-you-to-water-but-will-you-drink. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.