zwim / open-smartwatch-os

The Open-Smartwatch Operating System.

HowTo Run

Please read the documentation on the website!

Prerequirements

1. Install PlatformIO Core or PlatformIO IDE (which installs PlatformIO core automatically), as well as the packages specified in scripts/requirements.txt (e.g. pip install -r scripts/requirements.txt).
2. For LUA-scripting support (see env:LIGHT_EDITION_DEV_LUA): Install SWIG (also available in most package managers, e.g. brew install swig or apt install swig)
3. Then clone this repository:

   $ git clone --recurse-submodules https://github.com/Open-Smartwatch/open-smartwatch-os.git

   As this repository contains binary data (e.g. schematics or images), make sure to have git-lfs installed! Cloning this repository without git-lfs will result in missing or broken files.
4. To update the sources later on, run:

   $ git pull
   $ git submodule update --init --recursive

Build

The master branch is a stable version and the develop branch is our beta version. Recommended is, that you upload the master branch - except if you want to help us by testing the next release or need (very) new features 😉.

Visual Studio Code

Open the cloned repo in VSCode:

$ code open-smartwatch-os

You may rename the file include/config.h.example to include/config.h and adapt the values according to your requirements. That config is only applied once after you wiped the flash of the watch or changed the config-version numer in osw_config.h (...).

CLI

Alternatively, you can go to the repo folder with your terminal and run...

$ pio run -t upload

If you want to compile for a specific model, you can use the -e flag with an env name from the platformio.ini file.

Hack it!

To get started, take a look into the examples in the src/apps/examples folder - or just into any other app. If you want to compile the examples or other (by default) excluded applications, take a look into the main.cpp file and add the respective flags to the platformio.ini file.

CLI

If you want to print out the log for debugging (also including decoded exception traces), use the following command:

$ pio device monitor

In this serial console you also have the ability (beside much more) to configure the watch - just type in help to get started:

OSW > help
Available commands:
  configure - enter configuration mode
  help      - show this help
  hostname  - show the device hostname
  lock      - lock the console
  reboot    - warm-start the device forcefully
  time      - show current UTC time
  wipe      - format NVS partition and reset configuration

Creating Screenshots of your Apps

• Wi-Fi needs to be able to connect for this to work.
• You will need bash and ImageMagick for the helper scripts to work
• You'll need to enable the respective feature flag to enable it (see below)

The raw screenserver runs in the background and should report via serial:

Started RAW ScreenServer under http://.../api/screenserver

HowTo

• Add -D RAW_SCREEN_SERVER to your build flags in platformio.ini
• Build + Flash + Reboot the watch
• Connect + wait for the server to be started (see msg above)
• Run bash fetchScreen.sh <IP_OF_WATCH> screenshot.png
• Run bash composeScreen.sh screenshot.png screenshot_composed.png

If there is no curl, it must be installed.

$ apt install curl -y

The fetchScreen.sh downloads the raw image buffer from the running screen server, and converts the image to png. The composeScreen.sh creates the image with a surrounding smartwatch "overlay" (light edition).

The fast way (recommended)

Run the following inside the open-smartwatch-os directory:

$ cd scripts/screen_capture/
$ ./createScreenshot.sh <IP_OF_WATCH> <SCREENSHOT>

• The captured file can be found in the screenshot/ folder inside the open-smartwatch-os directory.

Troubleshooting

For more information on troubleshooting, see Wiki.

Arduino_TFT.h: No such file or directory

You did not clone the repository with the --recursive-submodules flag.

Failed to connect to ESP32: Timed out waiting for packet header

You did not hold down BTN1(FLASH) and then tap the RESET button on the watch whilst platform.io was trying to connect.

OSW Emulator

The OS itself can be executed as a regular program on your machine. This saves you time compiling for the watch and flashing the OS, every time you make a minor change - e.g. while developing the UI or a game, which not explicitly depend on the hardware of the watch.

This also implies some limitations what you can do with the emulator, as we had to hack and reimplement some of the Arduino-specific libraries and their (conflicting) simplifications. This also means, that it maybe necessary to extend those extensions down the road as we (likely) missed that one specific function you try to use... 😉

Build (cmake)

The emulator can be build using the CMakeLists.txt file - you may need to install additional libraries to be able to use it.

Here is a small example running on "Ubuntu 22.04 LTS":

$ sudo apt install libsdl2-dev libsdl2-image-dev g++ gcc cmake make build-essential
$ mkdir build && cd build
$ cmake ..
$ make -j $(nproc)
$ ./emulator.run

You also may extend the cmake-command with -DCMAKE_BUILD_TYPE=Release to get an even faster and smaller binary.

With Docker

If a library is unavailable, you can still use the emulator using docker (e.g. on Ubuntu 20.04 SDL2 is too old). Proceed with a typical docker installation. Showing an application running in docker requires some additional steps:

Host PC

Tested on Ubuntu 20.04.

$ xhost +
$ xauth list # Copy the result of the command. 
$ docker run --net=host -e DISPLAY -v /tmp/.X11-unix -d --name OSW -p 22:22 -it --privileged ubuntu:22.04

Docker

$ xauth add <'xauth list' command result>

Testing

After making some changes to the code, you should test the application by running our unit and UI tests.

Note: our tests do not cover 100% of the application. If you want to see which parts are covered by tests take a look at emulator/src/unitTests and emulator/src/uiTests.

Unit tests

Run all unit tests:

$ ./emulator.run --unit_tests

List all unit tests, one per line:

$ ./emulator.run --list_tests

UI tests

Run the emulator with UI tests window:

$ ./emulator.run --ui_tests

IMPORTANT: If you add some new features, it is strongly recommended to write unit and UI tests for them.

License

Everything in this repository is under a GPL-3.0 license, see here for more details.