I was working on something vaguely similar to this and to LoRaHaM: https://github.com/elvis-epx/sdr/tree/master/LoRaMaDoR https://github.com/elvis-epx/sdr/tree/

I was working on something vaguely similar to this and to LoRaHaM: https://github.com/elvis-epx/sdr/tree/master/LoRaMaDoR https://github.com/elvis-epx/sdr/tree/master/LoRaMaDoR but most hams around are stuck in 2M analog, some even find configuring a subtone too complicated, so it is difficult to work on something no one will bother to use.