AI Smart Hydration Tracker based on DA14695

Client

A hydration-focused wellness brand creating a smart reusable water bottle that automatically tracks fluid intake and syncs with fitness platforms.

Challenge

Accurately measuring sip volume from a reusable bottle with varying fill levels, orientation, and drinking angles, while maintaining dishwasher-safe construction.

Product Concept & Architecture

We embedded a Dialog DA14695 BLE SoC in the bottle cap. A low-power Hall-effect flow turbine in the spout measures flow rate. A DS18B20 thermometer tracks liquid temperature. The cap's PCB is fully potted in food-grade epoxy for dishwasher safety.

Engineering Solution

The DA14695's dedicated sensor node controller handles flow measurement during deep sleep. When flow is detected (>5mL/s), the main Cortex-M33 wakes, runs a volume integration algorithm, and updates the hydration log. A personalized hydration model adjusts daily targets based on local weather (fetched via phone), user activity (Apple Health/Google Fit sync), and sweat rate estimation.