In order to transfer the ownership of the contiki directories use the following command.  
 
In order to transfer the ownership of the contiki directories use the following command.  
   −
<code><nowiki> sudo chown :user /dev/ttyUSB0 </nowiki></code>
+
  sudo chown :user /dev/ttyUSB0
   −
<code><nowiki> sudo chown :user /dev/ttyUSB1 </nowiki></code>
+
  sudo chown :user /dev/ttyUSB1
    
== Using the Source Code ==
 
== Using the Source Code ==
 
=== Step 1 ===
 
=== Step 1 ===
   −
Go to /examples/ipv6/rpl-collect/ directory.
+
Go to /examples/collect/ directory.
    
=== Step 2 ===
 
=== Step 2 ===
   −
Now we need to program one mote as the sink and the other as source. We will use a predefined target called z1 to upload the code in the motes.
+
Now we need to program one mote as the sink and the other as source. We will use a predefined target called sky to upload the code in the motes.
    
For sink:
 
For sink:
   Exception encountered, of type "Error"