Hubitat Elevation home automation C8 Pro hub wall mount, files include five mounting options.
Blank: flat on back.
CS: for small poster Command Strips.
Keyhole: with a keyhole slot.
20mmoc: with four holes in a 20mm grid.
Skadis 40mm: with two holes spaced at 40mm.

Holder keeps hub slightly away from wall for additional cooling.
Hub can be inserted in multiple orientations for best cable management.

No supports needed. Print standing as pictured.

Edit: Update