This is a universal JTAG/SWD/UART/SPI/... adapter based around the FT2232H chip. This initially started based off the KT-Link specifications, but has since evolved into the following set of features: ...

Integrating IMU, GNSS, barometer, and telemetry modules. Developing embedded firmware (C/C++), programming MCUs, and supporting flight logic. Designing and prototyping PCBs for payload, telemetry, ...