I have interfaced the Rnode Lora device. It does Kiss and used a PI 3. Pretty straight forward. https://unsigned.io/projects/rnode/ I was able to do a client and a IGAte. I am now investigating using a TTGO device and Sone of them have KISS TNC firmware as well. Steve N0FPF -- Pardon the brevity, sent from a mobile device. So there.