If you ae pretty sure that your programme is all right and not sending any serial chars then there might be some other serial console programme sending To your arduino.
Or may be you have loop back on your arduino thats rx and tx connected together.
If you ae pretty sure that your programme is all right and not sending any serial chars then there might be some other serial console programme sending To your arduino.
Or may be you have loop back on your arduino thats rx and tx connected together.