User Manual

OAS/EMS NODES
www.sensicast.com
3
33
3-
--
-5
55
5
Back
Figure 3-4 shows the back of an OAS/EMS node.
FIGURE 3-4: BACK OF OAS/EMS NODE.
As shown in Figure 3-4, the main feature on the back of an OAS/EMS node is the power
switch.
There is a barcode label on the back of an OAS/EMS node. This label contains the node ID
and the association key for the node. The association key is entered into the database when the
node is added to the network. When a node asks permission to join the network, it sends its
node ID to the host. When the host gives permission, it replies with an association key specific
to that node. This association key is listed in the SensiMesh database with the node ID. When
the node receives this message, it confirms that the association key is correct. This provides a
two-way safeguard against spoofing the node or network. If the association key in the database
does not match the node’s association key, the node will refuse to join the network and will not
be shown in the network tree.
There is also a label on the side of the node. This label contains the node ID in human readable
format. The node ID is slightly different from the association key and is used as a node
identifier in the SensorNet Administration Software and other applications.