I am trying to use an Arduino Mega 2560 variable to change font and pco on Nextion TJC4832T035_011. Using the direct mySerial.write both font and pco change correctly however but when I try to use the sprintf code in Arduino no changes occur on the Nextion. It would appear that I have a problem …

Got up this Morning and "redid" the whole Serial2 thing and it works like a charm now. I thank you all for your help and patience. :smiley:

Using sprintf and nextion display

PaulRB November 8, 2021, 12:56pm 10

Looks like Serial2 is indeed pins 16, 17.

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