Little has changed beyond that, see the original project for full details. The remote sensor unit has a single LED indicator: RED when disconnected from display/error; GREEN when connected. It is contained in a simple laser cut box.
The sensor unit is simple with a power inlet, transformer sense input and a single bi-colour LED status indicator.
The display panel remains the same, with added layers to create an shallow enclosure.
I added indication for when connection from the sensor unit is lost.
Just a power inlet at the rear.