For the Pi part of your setup, are you using a pico like is listed on the mashtasic site, or have you found some way to get meshtastic to run on Linux (e.g. a Raspberry Pi 0/1/2/3/4)?
I ask because I'd like to use my LoStik to act as a receiver with a Pi Zero 2 W board but I can't find and existing software to make that happen.