And if you were to go back a few more years into the past, you’d have found when you bought a mouse with a PS/2 connector fitted, it may well have come with an adapter for a 9-pin RS232 serial port.

[Craig] cracked open a multimeter to unlock RS232 serial communications that can be used for data logging. There’s a couple of things that make this possible. First of all, the multimeter&#82… ...

Serial RS232 ports on programmable logic controllers (PLCs) are connected to external devices with nine or 25 pin cables that are used to transfer data by turning certain pins on and off. This leads ...

An RS232 port is available for $14, a single-port KVM for $48, and a 4G LTE expansion module for $110. There's also a microSD card reader with UHS-I support. Earlier in 2024, ...