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How to show command output from arduino to Nextion display?

Little bit complicated: I send a command (button pressed) from Nextion to Arduino (i.e "READ DATA VALUE")  and MCU execute the code (already tested and works well) and then reply in serial monitor "DATA 3 250; how can I show this output on Nextion display? 

Regards

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An erie silience is heard whistling through the air.

Tumbleweed blows past and cobwebs are everywhere.


You begin to notice almost every thread states:

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