The serial RS232 interface corresponds to the standards RS-232 (C) and V.24. Due to its reliability, the RS232 interface was quickly used in PC technology and consumer electronics.
Serial interfaces are used to exchange data between computers and peripheral devices. The data bits are transmitted one after the other (serially). The serial interface is available with a 9-pin or 25-pin connector.
In industry you cannot do without a serial interface. The serial interface is very easy to install and is completely sufficient for simple purposes.