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Arduino MEGA - Nextion display to tx1 rx1

Hello I have the Arduino Mega and I put I shield to mega who work with tx rx. Now i move the nextion communication on tx1 rx1. I must change options and to Nextion library?

NexConfig.h


change the line

  #define nexSerial Serial2

so that it now reads

  #define nexSerial Serial1

Thank you Martin.
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