Safecast Solarcast sensor device
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Safecast Solarcast sensor device is designed to operate off-grid and sense environmental parameters. It consists of 5 key modules designed for maximal reuse.

Modular design

  1. Air sensor module
  2. Geiger sensor module
  3. Battery power module
  4. Communications module
  5. Gateway module

In an optimal design all modules have their own BLE processor and can be directly combined between each other, initial design is however only partially modular.

Solarcast-1 Solarcast-2

Design parameters

The PCBs have to be designed in KiCad package.


All our projects are as usefully open-source as possible.

Hardware including documentation is licensed under CERN OHL v.1.2. license

Firmware and software originating from the project is licensed under GNU GENERAL PUBLIC LICENSE v3.

Open data generated by our projects is licensed under CC0.

All our websites and additional documentation are licensed under [Creative Commons Attribution-ShareAlike 4 .0 Unported License] (

What this means is that you can use hardware, firmware, software and documentation without paying a royalty and knowing that you'll be able to use your version forever. You are also free to make changes but if you share these changes then you have to do so on the same conditions that you enjoy.

Koruza, GoodEnoughCNC and IRNAS are all names and marks of Institut IRNAS Rače. You may use these names and terms only to attribute the appropriate entity as required by the Open Licences referred to above. You may not use them in any other way and in particular you may not use them to imply endorsement or authorization of any hardware that you design, make or sell.