sdrangel/plugins/samplesource/fobos/readme.md

Fobos SDR input plugin

This plugin adds native SDRangel sample source support for RigExpert Fobos SDR devices.

It supports automatic backend selection:

• Agile firmware/API through fobos_sdr.dll
• regular/classic firmware/API through fobos.dll

Initial scope:

• Fobos SDR backend loaded at runtime: Agile fobos_sdr.dll first, regular fobos.dll fallback
• Device enumeration and open/close
• Center frequency control
• Sample rate selection
• Relative bandwidth control for Agile backend (shown but ignored by Regular backend)
• LNA gain control, 0..2
• VGA gain control, 0..31
• GPO control
• Internal/external clock selection
• Synchronous streaming into the SDRangel sample FIFO

Runtime notes:

• On Windows, place fobos_sdr.dll and its runtime dependencies next to the SDRangel executable or make them available through PATH.
• The plugin intentionally does not use developer-machine paths such as C:\dev\....
• File logging is disabled by default. Configure with -DFOBOS_DEBUG_FILE_LOG=ON to write sdrangel_fobos_source.log for local diagnostics.

The plugin is intended as a native SDRangel sample source. It does not include analog video decoding or SDR# compatibility code.

Initial integration and hardware testing: Alex Antonov UT2UM Kyiv 2026.

Windows runtime packaging

On Windows, official SDRangel builds are expected to provide the Fobos SDR runtime packages through the SDRangel Windows dependency repository:

• external/windows/fobos-sdr for Agile firmware/API
• external/windows/fobos-regular for regular/classic firmware/API

The plugin build copies fobos_sdr.dll, fobos.dll, and the required libusb-1.0.dll runtime to the SDRangel binary directory so users do not need to copy runtime DLLs manually.

The companion dependency repository updates are tracked separately as:

• sdrangel-windows-libraries PR #32 for Agile runtime
• sdrangel-windows-libraries PR #33 for regular/classic runtime