I am getting an error stating the class “string” does not exist and in same block variable “port” and variable “ lastTime” does not exist . I believe it is something to do with a serial port list for the Arduino is not correct but since I am a beginner I do not know how to correct this . Any help …

I am attempting a serial communication with my Arduino

svan November 9, 2025, 8:43pm 2

Any way to see the code that’s causing problems?

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