Serial input

Sometimes you need to command the Magnolia to do something from the PC. If you do, then Serial input is a great simple way to communicate with the board without using up any of the pins.

Code setup

Just like in writing, before you can communicate, the Magnolia needs Serial.begin() to be called.

Instead of Serial.write we're going to call Serial.read, which returns either a character, or -1 if there is nothing to read.

To test it out, add this to your loop()

int inchar = Serial.read();
if( inchar != -1 )
{
    Serial.print( "Recvd [" );
    Serial.print( inchar );
    Serial.print( "] = \"" );
    Serial.write( inchar );
    Serial.println( "\"" );
}

And then upload.