> The PineTime is a free and open source smartwatch capable of running custom-built open operating systems. Some of the notable features include a heart rate monitor, a week-long battery as well as a capacitive touch IPS display that is legible in direct sunlight. It is a fully community driven side-project, which means that it will ultimately be up to the developers and end-users to determine when they deem the PineTime ready to ship.
The **Pinetime** smartwatch is built around the NRF52832 MCU (512KB Flash, 64KB RAM), a 240*240 LCD display driven by the ST7789 controller, an accelerometer, a heartrate sensor and a vibrator.
The goal of this project is to design an open-source firmware for the Pinetime smartwatch :
- Code written in **modern C++**;
- Build system based on **CMake**;
- Based on **[FreeRTOS 10.0.0](https://freertos.org)** real-time OS.
- Using **[LittleVGL/LVGL 6.1.2](https://lvgl.io/)** as UI library...
- ... and **[NimBLE 1.3.0](https://github.com/apache/mynewt-nimble)** as BLE stack.
This project is far from beeing finished, and there are still a lot of things to do for this project to become a firmware usable by the general public.
Here a quick list out of my head of things to do for this project:
- Improve BLE communication stability and reliability
- Add more BLE functionalities : call notifications, agenda, configuration, data logging,...
- Measure power consumption and improve battery life
- Improve documentation, take better pictures and video than mine
- Improve the UI
- Create companion app for multiple OSes (Linux, Android, IoS) and platforms (desktop, ARM, mobile). Do not forget the other devices from Pine64 like [the Pinephone](https://www.pine64.org/pinephone/) and the [Pinebook Pro](https://www.pine64.org/pinebook-pro/).
- Design a simple CI (preferably selfhosted and easy to reproduce).
Do not hesitate to clone/fork the code, hack it and create pull-requests. I'll do my best to review and merge them :)
## Credits
I’m not working alone on this project. First, many people create PR for this projects. Then, there is the whole #pinetime community : a lot of people all around the world who are hacking, searching, experimenting and programming the Pinetime. We exchange our ideas, experiments and code in the chat rooms and forums.
- [Atc1441](https://github.com/atc1441/) : He works on an Arduino based firmware for the Pinetime and many other smartwatches based on similar hardware. He was of great help when I was implementing support for the BMA421 motion sensor and I²C driver.
- [Koen](https://github.com/bosmoment) : He’s working on a firmware based on RiotOS. He integrated similar libs than me : NimBLE, LittleVGL,… His help was invaluable too!
- [Lup Yuen Lee](https://github.com/lupyuen) : He is everywhere : he works on a Rust firmware, buils a MCUBoot based bootloader for the Pinetime, design a Flutter based companion app for smartphones and write a lot of articles about the Pinetime!
