It stands to reason that with an SDR and GNU Radio, you could send and receive Meshtastic messages. That’s exactly what [Josh Conway] built, and you can see a video about the project ...

He has been a volunteer with GNU Radio since 2017 and active in the administration of the project since 2018. His personal research has included using machine learning to create adaptive modulation ...

the video that [Tony] has put together serves as an excellent practical example of using software defined radio (SDR) to examine and ultimately replicate a wireless communications protocol.