I recommend getting a rtl-sdr and playing around with rtl_433. It will probably change your mind about needing to be very close to things.
Even with the small antenna these devices come with, I can pickup TPMS signals from the cars on the nearby streets, and that's with the antenna indoors.
Even with the small antenna these devices come with, I can pickup TPMS signals from the cars on the nearby streets, and that's with the antenna indoors.