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Nextion 7" w/capacity touchscreen calibration problem


how can I calibrating my capacitive touch screen in Nextion 7" enhanced.
Now I try use the "touch_j" command but nothing appear on the screen.
Communication with Nextion is OK because, for example "dim=30" command give result.

I need to calibrate it because the touched point is offset from the image.

Thanks for any suggestion.

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