Dear all,
I'm new here, new in electronic and new in Arduino stuff as well. So I'm grateful to everyone who can help me.
I'm working on my first project, which is an anemometer. I have a four digit led display and a wind sensor with a reed switch... and Arduino UNO of course 
Very simple.
Everything works fine, but as long as I activate the serial communication to display data on the PC, the display behavior becomes unpredictable. One digit turns off until I disable the serial communication.
Does anyone know why ? Is there a known issue with the serial monitor ?
Thanks !
Federico, Milano - Italy
Did you by any chance connect the 4-digit display to pin 0 or 1? Those are used for the serial communication.
Other than that, it's hard to answer without seeing the code and connection scheme.
Hi igendel,
you are right !
I connected both 0 and 1.
So as the serial communication was only for testing purpose, I can leave it as is.
Thank you !!!
fedex:
So as the serial communication was only for testing purpose, I can leave it as is.
Thank you !!!
No problem - just remember, leaving things connected to pins 0/1 may also interfere with the Arduino programming process. Better use other pins instead, or make sure you have a convenient way to disconnect them from the circuit when required.