HDMI has died on EdgeBox. Can I still get to a console?

I have an EdgeBox-RPI-200. My HDMI has died and I’d like to still use this headless if that’s even possible. The EdgeBox can do RS-232 on pins 4, 6 and 8 of the green connector block. Would that give me access to the tty console? Is there another way to get console access to this now? Thanks in advance for any assistance you can provide.

Perhaps you can establish a wifi SSH connection to the EdgeBox-RPI-200 in order to open a terminal for operations.