An open source smartwatch built by a maker for the maker community packed with interesting features and runs on the zephry RTOS
Outlined below is a breakdown of the hardware componenets considered for this design;
- NINA-B306 module (nrf52840 based microcontroller)
- 1MB flash memory
- 256KB of RAM
- Bluetooth LE
- internal pcb antenna
- LSM6DSOX IMU with 6-DOF from stmicroelectronics.
- BQ24230 single cell li-ion charger with dynamic power path managament(DPMM) from texas instruments
- BQ27441-G1 battery fuel guage also from texas instruments
- TPS62202 high-efficiency step-down DC-DC converter
- MAXM86146 complete biometric sensor hub - a wrist-based heart rate monitoring and pulse oximetry. All computations are done on device freeing the MCU to perform other tasks.
- FIREFLY E2218 true green color for health monitoring i.e HRM and pulse oximetry
- SFH 7015 hyper-red and infrared for HRM and pulse oximetry
- 1.28'' round tft display with GC9a01 display driver
- RV-8523-C3 crystal to serve as real time clock/calendar
- USB-C interface for easy flashing of firmware