Put the serial line five times and four times. The first speaker on the left is 1, and speakers 2, 3, 4 and 5 are on the right. Connect the USB green cable to the speaker 2 of the serial line, connect the USB white cable to the speaker 2 of the serial line, and connect the USB black cable to the speaker 5 of the serial line.

Extended data

USB is a serial bus standard and a technical specification for input and output interfaces. The latest generation is USB 3. 1, the transmission speed is 10Gbit/s, the three-stage voltage is 5V/ 12V/20V, and the maximum power supply is 100W. The new C plug-in is no longer divided into positive and negative parts.

The red line of USB cable is USB power supply; White is the USB data line (negative electrode); Green is USB data cable (positive); Black is the ground of GND.

Serial interface is called serial port for short, also called serial communication interface or serial communication interface (usually referred to as COM interface), which is an extended interface adopting serial communication mode.

The angle 1 of serial line RDB-9 is DCD carrier detection; 2. RXD receives data; 3 is the data sent by TXD; 4.DTR data terminal is ready; 5 is the SGND signal. 6 is that the DSR data is ready; 7 is RTS request sending; 8 is clear transmission of CTS; 9 is the RI ringing prompt.

References:

Baidu Encyclopedia-Serial Interface

Baidu encyclopedia -USB interface