Alright I was able to find the UART test pads on the xx60 boards, for anyone following along here they are at the bottom center ish of the board:
(The baud rate is 115200)
The U-Boot version displayed was: U-boot-00000-g9ca3277-dirty(yushan_one_2G@yushan_one) (Jun 04 2024 - 16:09:26)
Which led me to a github org android-crestron · GitHub which appears to be a stock android build for these devices, I’ll reach out to the owner of these to see if there’s any documentation on how to use them.
The UART also grants root shell after booting:
