A system and method of serving text-based data messages to a caller identification system in a telecommunications network environment may overwrite source-specific information in a selected data packet header field with text-based message data. The transmitter is provided on a wheel of a vehicle and includes a pressure sensor configured to sense the inflation pressure of a tire on the wheel and generate a pressure signal indicative of the sensed inflation pressure. For example, in one aspect, the invention provides vertical insulating layers separating two devices, such as photodiodes, formed on a semiconductor substrate from one another. The device driver is further told when the atomic sequence is complete, such that a new consistent state is thereby defined.