Connecting arduino to nextion simulation on pc

How I may connect real arduino with nextion simulation on pc?

You need a USB to TTL serial module. Look on Amazon. Hook up Arduino. RX Nextion to TX Arduino and TX Nextion to RX Arduino. Then chose to use MCU instead of the keyboard for input. It is a radio button. Choose the correct serial port. Don’t forget to choose Simulate the Nextion in the dropdown box. Hit Start.