What is the SensorApplLayer module ?
The sensor application layer generates packets to simulate the activity of a sensor network. You can configure it as you like: the inter-arrival times of the packets can be distributed according to a uniform distribution, or exponentially. Some of the nodes can be switched off (nbPackets = 0) as it is commonly the case for the sink node (the tree root node). The rates can be specified individually if you want it so.