I would like to send multiple variables from Arduino to Labview to plot them in real time. Serial.print command is insufficient (laggy), so I've done some searching and found this example: http://www.stefanocottafavi.com/?p=412&page=2. With this VI and code I can now send one float variable without any lag. I don't know how to send more of them though
The trick is to make packets of data, a packet starts with a start byte, then an identifier then the value and then a stop byte, optionally there is a crc code for error detection.
think of it as < P = B B B B >
So sending the altitude becomes :
void writeAltitude(float val)
{
 writeField('A', val);
}
void writeTemperature(float val)
{
 writeField('T', val);
}
void writeField(char ID, float val)
{
 Serial.print('<'); // start byte
 Serial.print(ID); ID
 Serial.write (&val, sizeof (val));
 Serial.print(">"); // stop byte
}
On the receiving site you must unpack the data again of course