Hello World¶

This is the Experiment Description (ED) for the "Hello World" simple experiment.

Note: In this experiment, nodes are referred to by their [x,y] co-ordinates. This notation for referring to nodes in scripts is historical, and based on the fact that resources used to be organized in a 20 x 20 grid. This is still the case at WINLAB. However, the resources at NICTA are not organized in a grid. Note that some of the tutorials still use the (x,y) cor-ordinate notation to refer to the resources. OMF code is being updated to support a flat numbering system to reference resources in experiments.

 1 #
 2 # A)  Define the 'source' group, which has the unique node [1,1]
 3 #     Nodes in this group will execute the application 'test:proto:udp_sender'
 4 #
 5 defGroup('source', [1,1]) {|node|
 6 
 7   node.prototype("test:proto:udp_sender", {
 8     'destinationHost' => '192.168.0.2',
 9     'localHost' => '192.168.0.1',
10     'packetSize' => 256, # in Bytes
11     'rate' => 8192 # in bits/sec
12 
13   })
14 
15   # mode can be 'adhoc' or 'managed' or 'master'
16   node.net.w0.mode = "master" 
17 }
18 
19 #
20 # B)  Define the 'sink' group, which has the unique node [1,2]
21 #     Nodes in this group will execute the application 'test:proto:udp_receiver'
22 #
23 defGroup('sink', [1,2]) {|node|
24 
25   node.prototype("test:proto:udp_receiver" , {
26     'localHost' => '192.168.0.2'
27   })
28 
29   # mode can be 'adhoc' or 'managed' or 'master'
30   node.net.w0.mode = "managed" 
31 }
32 
33 # 
34 # C)  Configure the wireless interfaces of All the Nodes involved in 
35 #     this experiment
36 #
37 allGroups.net.w0 { |w|
38   w.type = 'g'
39   w.channel = "6" 
40   w.essid = "helloworld" 
41   w.ip = "%192.168.0.%y" # the '%' triggers some substitutions
42 }
43 
44 #
45 # D)  When all the nodes are turned On and the all the applications
46 #     are installed and ready, we can start to perform the experiment
47 #
48 whenAllInstalled() {|node|
49 
50   wait 30 
51 
52   allGroups.startApplications
53   wait 20
54 
55   Experiment.done
56 }

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