I came across these boards looking at the Adafruit website. https://www.adafruit.com/products/3...0NAaB1MeYm9HQAHBnZ0D3M9cIF8oHHQbwUaAijl8P8HAQ (Hopefully the link works... if not, Adafruit calls it a LoRa Featherwing. There is a 900mhz and 432mhz version) What could these be used for? My first thought was to use them as a repeater, a receiver, etc. I haven't got a clue about their software but perhaps it gives a clue about what mode(s) could be used... FM, SSB, etc. It looks like they can be dynamically tuned up and down the spectrum a bit. I dunno if these have any ham use. 900mhz equipment is hard to find. Here is another one. https://www.adafruit.com/products/3071 They call this a radio breakout board. This particular one is 432 also. There is another one more similar to the Featherwings that says it is 'packet radio', but I'm not sure if it is a different term than what I thought packet radio is... the older mode, I mean Sorry if these aren't R Pi capable... not sure how to tell. I'm still learning about the R Pis.