Cant find my hardware (arduino cant connect to my smartphone)

I can’t connect my arduino uno to my smartphone, when I do the blynk-ser.bat -c COM10 (since my port is 10) in the cmd, the cmd always reply reconnecting in 3 secs. Help me this is for my thesis thanks a lot.

I tried the example in the arduino IDE (Arduino serial or usb) code.

Have you checked these directions?

Also, you cannot use both the USB link and the Serial Monitor at the same time… only one connection over a Serial port at a time.

thank you so much man problem solved :slight_smile: