nothing is wrong, it's to do with operator overloading and the print function trying to be helpful.

if you change this line:

int incomingByte ;

to this:

char incomingByte ;

it should display correctly

and the extra characters are because the software on the computer is sending line endings. these may be a linefeed with or without a carriage return. you could either just ignore them, or make use of them to create multi character commands (if you need them)

You can ignore them by:

     if ((incomingByte != 10 && (incomingByte != 13))
     {
        Serial.print("I received: ");
        Serial.println(incomingByte);
     }

If you only want printable characters, check if you can use the isprint function (isprint function

so it should look like

    if (isprint(incomingByte))
    {
        Serial.print("I received: ");
        Serial.println(incomingByte);
    }

nothing is wrong, it's to do with operator overloading and the print function trying to be helpful.

if you change this line:

int incomingByte ;

to this:

char incomingByte ;

it should display correctly

And the extra characters are because the software on the computer is sending line endings. these may be a linefeed with or without a carriage return. you could either just ignore them, or make use of them to create multi character commands (if you need them)

nothing is wrong, it's to do with operator overloading and the print function trying to be helpful.

if you change this line:

int incomingByte ;

to this:

char incomingByte ;

it should display correctly

and the extra characters are because the software on the computer is sending line endings. these may be a linefeed with or without a carriage return. you could either just ignore them, or make use of them to create multi character commands (if you need them)

nothing is wrong, it's to do with operator overloading and the print function trying to be helpful.

if you change this line:

int incomingByte ;

to this:

char incomingByte ;

it should display correctly

and the extra characters are because the software on the computer is sending line endings. these may be a linefeed with or without a carriage return. you could either just ignore them, or make use of them to create multi character commands (if you need them)

You can ignore them by:

     if ((incomingByte != 10 && (incomingByte != 13))
     {
        Serial.print("I received: ");
        Serial.println(incomingByte);
     }

If you only want printable characters, check if you can use the isprint function (isprint function

so it should look like

    if (isprint(incomingByte))
    {
        Serial.print("I received: ");
        Serial.println(incomingByte);
    }