Check out www.hamviop.com Doug has a Readme on wifi for the RPI3. It sounds like your running the hamvoip image. Also there is an email list there for help too.

N1XBM
Apparare Scientor
Paratus Communicare
Allstar Node # 27086, 41540, 41812, 42086, 42658, 42657
www.radioguysrepeaternetwork.com