There’s a sub thread on the motorcycles group that had something you might be interested in.
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Mark Ols I've recently been getting back to my little project of figuring out how to add a tire pressure display to my car, either by interfacing to the OBD2 port, or listening to the TPMS sensors directly using rtl_433 and displaying the results on a 1.3" LCD HAT attached to a Raspberry Pi Zero W. I've gotten the latter to work fairly reliably, but going through the OBD2 port would involve quite a lot of traffic sniffing on the CAN bus which seems way too much like going back to my real job.
Take a look at one of these:
They can run rtl_433 and do the display all on one tiny board.
To get back on topic, I ended up spending similar money for a little solar powered display unit and 6 screw-on pressure sensors for the motorhome.
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