using Serial.print from a library file


i trying debug sketch uses several libraries , use serial.print within library nothing being printed serial monitor.  i've tried using serial.begin(9600) within library file , in sketch file , both.  need print function within library file?

go on.   you have 93 posts under belt.

put serial.begin(9600); setup() function.

i follow serial.println("hello project name");
to verify working.

the same applies project whether led,  lcd, oled, ...
you can remove later if want debug purposes shows how far program has got.

david.


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