Before USB ports became standard on PCs, several devices connected through a serial port. They're obsolete in many ways, but they still see some use.

Four-Port Serial Communication Module. Nov. 12, 2018. The GRV-CSERI-4 serial module from Opto 22 add RS-232C and RS-485 serial communications to the EPIC system. ... Programmable Industrial Controller ...

At one point, the Serial RS232 Communication protocol was the height of communication, but there are better and more reliable communication protocols out there. Will Aja lays out why it’s time to move ...

Q: What is the function of an RS-232 port? A: An RS-232 port is a standard digital physical interface and protocol for relatively low-speed serial data communication between computers and related ...

Also known as an RS-232 port, serial ports provide very slow speeds and have been superseded by USB on desktop computers. USB-to-serial adapters are available for old peripherals. DB (D-Sub ...

But the serial port is not dead. While RS-232 is mainly gone from the computer scene, it is still alive and well in industry. In fact, ... and communications sectors.

The simple method described here evaluates a one-wire device that uses pulse-width-encoded communications from a PC serial port. Communications errors such as parity and acknowledge are monitored ...