Tire pressure monitoring unit with expandable program library and method for supplementing a program library of a tire pressure monitoring unit

A method for adding, to a library of control programs in a data storage device connected to a microcontroller of a tire pressure monitoring unit, an additional control program, said method comprising:

• receiving the additional control program in the form of low frequency signals by a receiver of the tire pressure monitoring device;
• storing the additional control program in a program memory that is integrated into the microcontroller;
• reading out the additional control program of the program memory and writing into the data storage device;
• transferring the additional control program from the microcontroller into the data storage device via a serial peripheral interface bus;
• and
• wherein after the additional control program has been stored in the data storage device, transferring a loading program from the data storage device into the program memory and, when this loading program is activated by wireless low frequency control signals received by the tire pressure monitoring device, it selects one of the control programs from the library and loads it into the program memory.