Hi @Josh-Morehead
S.BUS2 is not supported on ModalAI hardware (at this time). Please put your S.BUS2 device/receiver into legacy/conventional S.BUS mode.
Additionally, for S.BUS receivers, please make sure you are using a cable meant for S.BUS that picks up 5V instead of the noted RC port we have which is 3.3V for Spektrum satellite receivers.

This guide can help you convert a FCv1 S.BUS cable into FCv2: https://docs.modalai.com/cable-userguides/
See MCBL-00218-1 and MCBL-00064 both of which are based on MCBL-00018: https://docs.modalai.com/cable-datasheets/#mcbl-00018
We hope to have ready-made MCBL-00218/221 cables for purchase listed soon!

Thanks and hope that helps.