Open Source Smart Watch



  • IpSensorMan - exposes heart rate, cycling speed and cadence.

  • Music player - controls music player and exposes information like current track name, author and album name.

  • Tasker - allows to run a task defined in Tasker.

  • Weather - provides weather conditions and 5-day forecast for the given location and language (temperature, pressure, humidity, wind speed, description and icon code).

  • Sample - sample extension with available source code.


OSSW is an open source firmware for Weloop Tommy/Chronos Eco watch. With this firmware you can define custom screens and assign custom actions to the buttons. At this stage OSSW watch can be used standalone or with an android (4.3+) phone. You can extend functionality with available extensions or by writing your own extension.

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