https://www.rhizomatica.org/hermes/

https://la4tta.blogspot.com/2018/04/setting-up-ardop-on-raspberry-pi.html

https://www.whitemesa.net/garim/garim.html#pi9k

https://www.cantab.net/users/john.wiseman/Downloads/Beta/

www.tnc-x.com/TNCPi9K6.pdf

https://groups.io/g/RaspberryPi-4-HamRadio/topic/77370868?p=,,,20,0,0,0::recentpostdate/sticky,,,20,2,220,77370868

---

recovery

https://groups.io/g/RaspberryPi-4-HamRadio/topic/74880918