What is Serial Communication?
Serial communication refers to a communication method in which data can be transmitted in bits using only one receiving line and one sending line. Although serial communication is slower than parallel communication based on byte transmission, the serial port can realize data transmission using only two wires.
The typical serial port communication uses 3 wires to complete, namely ground wire, send, receive. Since serial communication is asynchronous, the port can send data on one wire while receiving data on the other wire.
The most important parameters of serial communication are baud rate, data bit, stop bit and parity check. For two ports that require serial communication, these parameters must match, which is also a prerequisite for serial communication.
Schematic diagram of serial communication data transmission
