title: how can I send integer array in unicast example of contiki?
body: <p>In the example-unicast.c program through packetbuf function, I can send
  string from sender node to receiver node. Now instead of sending
  string i want to send integer data array.
  I was trying this packetbuf_copy()
  I am using contiki 3.0.
  thank you in advance.</p>