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c:/users/asus/appdata/local/arduino15/packages/stmicroelectronics/tools/xpack-arm-none-eabi-gcc/12.2.1-1.2/bin/../lib/gcc/arm-none-eabi/12.2.1/../../../../arm-none-eabi/bin/ld.exe: libraries\ITEADLIB_Arduino_Nextion-master\NexHardware.cpp.o: in function `nexLoop(NexTouch**)':
NexHardware.cpp:(.text._Z7nexLoopPP8NexTouch+0x70): undefined reference to `Serial2'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Generic STM32F1 series.