USB multitool (2 USB ports from HUB, 1xRS232/TTL serial, radio interface w/gpio)
Schematic (analog section): Veli-Matti OH7JEV & Eero OH2BTG & co commenting the schematic at OH2K club
Layout design : Lasse OH3HZB (me)
Licensed under CC-BY 4.0, see https://creativecommons.org/licenses/by/4.0/