This is an official example code :
Link:http://labs.mediatek.com/site/global/developer_tools/mediatek_linkit/api_references/UARTClass__read.gsp
[code]int incomingdata = 0;
void setup()
{
Serial.begin(9600);
}
void loop()
{
if (Serial.available() > 0)
{
incomingdata = Serial.read();
Serial.print("received data: ");
Serial.println(incomingdata, DEC);
}
}[/code]