Bug fixed

Hi Andreas,

I managed to fix a bug on the Arduino code for the parking assistant, give a look..

<code>
    pub.fixedHeader = 48;
    pub.length = 2;  //=6
    pub.lengthTopicMSB = 0;
    pub.lengthTopicLSB = 2;
    pub.topic = (byte_) "us";
//    pub.payload = (byte_) val;   This doesn't work
    pub.payload = (byte*) &val;   // This works

</code>

ciao
a
