I'm hoping these photos post. There are two of the little brown things, one on the bedroom wall, the other on a dining area wall. The antenna looking thing is on the driver's side roof and has been obviously broken off.
I am not so sure the brown things are temp sensors, The black thing on the outside of the rig is deffently an antenna mount.
The brown things might be temp sensors, or they might be stnad-offs (used to hold a wire lead at a distance from the wall) or mounts for something. Try CAREFULLY removing one a short distance (Say a quarter inch) and seeing if there are wires going to them. If so they are sensors, if not they are mounts of some kind (Technically a stand off is a wire mount)