See the Wiki Software Install page for more details: https://github.com/alanbjohnston/CubeSatSim/wiki/Software-Install. To build and run the software on a Raspberry Pi 3B, 3B+, or Pi Zero W:
After rebooting, to hear AFSK telemetry (X.25 data), tune your radio or SDR to 434.9 MHz FM, and you should receive telemetry from the CubeSat Sim:
`CubeSatSim/radioafsk`
This code uses the Brandenburg Tech Digital Transceiver, based on DigitalTxRxRP https://brandenburgtech.wordpress.com/ If you don't have the SPI Interface enabled and the board plugged in, you will get an error.