I need to communicate a CLICK PLUS with a Nextion Model NX8048P050-001-Y. I just need to pass a single character to the PLC once a push button is pressed on the display. I have configured the PORT2 of the CLICK PLUS as follows (to match the display):

• Baud Rate: 9600
• Parity: None
• Stop Bit: 1
• Communication Data Bit: 8
•  

DISPLAY SIDE

The way I am (trying) passing to pass the single ASCII character to the PLC is by triggering a print command each time the button is pressed, as follows:

print va0.text

Where va0, has been configured as follows:

sta: String

txt: 3

Indeed while using the Debug Mode of the Nextion S/W I do see that the print command is "printing" a 3 character.

PLC SIDE

Again I configured PORT2 to match the setting of the display.

I do have a single Receive rung triggered by the PLC 100 ms timer. I am reading (or trying to read) the message coming from the display, which is supposed to be the ASCII character 3.

And this is how the program looks:

CONNECTIVITY BETWEEN THE DISPLAY AND THE PLC

I am powering he display (right now) via a USB charger, and making the communication connection per the following diagram:

The only see that I notice is the RX led on the RS-232 Poert on the PLC on, other than that, nothing happens!

Any ideas?

I will appreciate it!

I have attached the PLC program