DoseFlow

Elderly and chronically ill patients frequently miss medication doses, leading to worsened health outcomes. Existing solutions are either too expensive or lack physical verification.

Built a dual-microcontroller IoT system with physical dose verification sensors, a finite state machine for dose tracking, offline buffering, and cloud sync — all at a fraction of commercial cost.

• 01Arduino Uno + ESP32 dual-controller architecture via level-shifted UART protocol
• 02VL53L0X Time-of-Flight sensor + mechanical limit switches for dose consumption verification
• 03Finite state machine: WAITING → DUE → SNOOZED → CONFIRMED → MISSED
• 04DS3231 RTC-driven buzzer and SH1106 OLED alerts
• 05ESPAsyncWebServer captive portal for Wi-Fi provisioning
• 06LittleFS flash memory buffering with HTTPS/REST sync to MongoDB

• →Low-cost hardware solution accessible to developing-world patients
• →Physical dose verification (not just reminders)
• →Offline-first with automatic cloud sync on reconnection