RWT uses the Openembedd/Yocto build system to develop a custom Linux distribution for each radio and specific mission application. Each radio is shipped with a microSD card with a pre-installed Linux operating system. The custom Linux distribution distributed with RWT SDRs is a development environment suitable for a non internet connected test and development device. Rebuilding the distribution for a final product is highly recommended. This would include removing any extra packages,adding in common security settings like a root password, proper user creation, limiting debugfs access etc is strongly recommended.

For new users this is an advanced topic. RWT strongly recommends reading through the documentation provided by the Yocto Project . This wiki is not a detailed explanation of how to use OpenEmbedded/Yocto, the existing documentation is extensive.

RWT plans to provide an SDK in the near future which will allow code development without building a full image and SDK.

Currently RWT uses the kirkstone release of Openembedded/Yocto for development of the custom Linux distribution. All modified recipes that RWT uses are in the RWT github repository.

The starting point for the RWT Oxygen Development SDR is the build-oxygen repository, it contains git sub-modules to the correct version of the repositories to start building from. There is a Readme with basic instructions on how to get started.

For the Carbon SDR with a FPGA larger than the ZCU3EG the starting point is the repository carbon-build, it contains git sub-modules to the correct version of the repositories to start building from.. There is a Readme with basic instructions on how to get started.