Connect to the switch console port, type the keyboard I will get messy code

Question

I follow the Tutorial to connect a switch,

use ls *usb* I can find the usb:

$ ls *usb*
cu.wchusbserial1410   
tty.wchusbserial1410

I connect to it:

screen tty.wchusbserial1410 9600

but I get the messy code when I type the keyboard.

I type enter, there gets the ?, I type s, there will get f. you can see in the snapshot:

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EDIT-01

My switch is Juniper-EX4300 and the usb driver is Qinheng.

and the Juniper manual shows the Baud rate is 9600.

EDIT-02

I use the console-serial line connect the switch port, and then use the serial-USB convertor connect the line and my Mac.

Answer 1

Serial port settings mismatch. Please set serial setting as below:

• Baud rate—9600
• Flow control—None
• Data—8
• Parity—None
• Stop bits—1
• DCD state—Disregard