August 25, 2015: I received a sample app from TI today and it reads analog sensors and reports the value on a graph. It's exactly like what I need to read an analog pressure sensor as in this design. I plan on using it with zero changes at first - I will try to select the gain components in my hardware so that the analog pressure exactly corresponds with the temperature. That way, only the units on the graph will be incorrect. The value will be correct - 100 degrees C will correspond to 100 psi. I can change the units and rebuild the graph later.

TI also told me that reprogramming the micro through the RFID reader is supposedly very easy. If I can prove this out, I can get rid of the reprogramming connector and drastically simplify the circuit. This would make the design much more suited for a conductive ink printed design, or for other types of PET design where vias aren't easy.

I started talking to companies about flexible designs, and it will be absolutely necessary for the design in the long run. I've almost gone as far as I can with a rigid PCB design, since it won't fit inside the tire tube. I put the rigid board in a bike tire, and it stood too tall for the tire to seat properly, nevermind the fact that I didn't put it inside the tube for this test anyway.