Com: Serialfd

In Unix-like operating systems, a serial file descriptor (Serial FD) is a special type of file descriptor that allows a program to access a serial communication port. When a program opens a serial port, the operating system returns a file descriptor, which can be used to read and write data to the port.

In serial communication, data is transmitted one bit at a time, and each bit is represented by a signal that is either high (1) or low (0). The data is transmitted in a sequence of bits, and the receiver must be able to distinguish between each bit. serialfd com

Before connecting to external devices, perform a simple loopback test: In Unix-like operating systems, a serial file descriptor

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