Features_list.md

**Round watch development board summary **

Hardware features:

• Pulse and SPO2 measuring

• Integration with ST7789V display driver

• LVGL library porting

• BLE custom service

• Time displaying ( RTC )

• Time synchronization over BLE Service

• Battery level displaying BLE

• Battery level displaying Display

• Accelerometer clock sleep out

• Energy-Save mode

  Android integration:

• Alarms support

• Notifications from Android device

• Music switching over Android device

  Optional / Additional features

• Simple 3D render engine for triangles wireframe rendering

• Mobile application

• CMake-based build for project

• VSCode debug & development

• KiCad as CAD system for PCB

• I2S micro for audiomessages

• Research lightweight inter-processor communication

Part list:

MCU:

NRF52832-E73 module

Accelerometer:

MPU9250

Display module:

ST7789V Round, resolution 240 * 240 or 240 * 208

https://github.com/ValentiWorkLearning/ST7789_Round_DevBoard/tree/master/Panel

https://ru.aliexpress.com/item/1962405888.html?spm=a2g0o.cart.0.0.38713c00M67wvz&mp=1

PulseOximeter:

MAX30102/MAX30100

http://www.kosmodrom.com.ua/el.php?name=MAX30100-MODUL

Logic converter:

TX0108E

http://www.kosmodrom.com.ua/el.php?name=TXS0108EPWR

Battery controller:

LTC4054ES5-4.2

http://www.kosmodrom.com.ua/el.php?name=LTC4054ES5-4.2

LDO

1. 1.8V - MCP1700T-1802 http://www.kosmodrom.com.ua/el.php?name=MCP1700T-1802E_MB
2. 3.3V - MCP1700T-3302 http://www.kosmodrom.com.ua/el.php?name=MCP1700T-3302E_TT
3. 2.8V - LP2985 http://www.kosmodrom.com.ua/el.php?name=LP2985AIM5-2.8_NOPB

Schematic Libraries:

• Nordic nRF52832 MOD

https://kicad.github.io/symbols/RF_Module

• W25Q128

[https://www.snapeda.com/parts/W25Q16BVSSIG/Winbond%20Electronics/view-part/](https://www.snapeda.com/parts/W25Q16BVSSIG/Winbond Electronics/view-part/)

• MPU-9250

[https://www.snapeda.com/parts/MPU-9250/TDK%20InvenSense/view-part/](https://www.snapeda.com/parts/MPU-9250/TDK InvenSense/view-part/)

Software dependencies:

• LVGL - https://github.com/littlevgl/lvgl - open-source embedded GUI library
• Callback connector - library for wrapping C++ class members into C-style callback

https://github.com/Toxa-man/CallbackConnector

• Lightweight C++ signals for small systems https://github.com/larspensjo/SimpleSignal
• SDL-mirror - is used by Simulator subproject https://github.com/spurious/SDL-mirror