Kingham Xu's OV-Watch Is a Slick, $20 Open Source STM32 Smartwatch Built Around FreeRTOS and LVGL

This is A smart watch based on STM32 & LVGL & FreeRTOS, the total cost is about 100 RMB which equal to about $20 USD. All the hardware & software & 3D print shell are finished by my self, you can freely modify them if you want. The functions of this watch includes basic watch's function, calculator,...