I cant send/receive any thing i type any thing to the serial moniter

i have the same problem but i cant send/receive any thing i type any thing to the serial moniter but it diseper
soory but my english is abd .

Show you code, your circuit and any photo you think will help get a reply.

This short example will echo back every character you type to Serial Monitor. This should work on any Arduino.

void setup()
{
  Serial.begin( 9600 );
}

void loop()
{
  if ( Serial.available() )
  {
    int c = Serial.read();    
    Serial.write( c );
  }
}

1 Like

Make sure the Serial Monitor has the matching baud rate selected