WSN Dynamic Configuration
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This Example demonstraites how to configure properties and access data from NI WSN nodes dynamically on the NI 9792 WSN gateway.
Downloads
Filename: wsn_dynamic.zip
Requirements: View
WSN Dynamic Configuration
NI WSN's use the NI Shared Variable engine (SVE) I/O Variables to publish data to the network. Normally, properties for nodes are obtained by right clicking a node in the LabVIEW project and selecting properties. See, Step 6. Start Using the NI WSN System in the NI Wireless Sensor Network Getting Started Guide for more information.
Properties are configured using the I/O Variable Dynamic API. The I/O variable LabVIEW VI's can be found on the block diagram by going to:
Data Communication >> Shared Variables
Property nodes and other application functions can be found in:
Programming >> Application Control
The example attached shows how this can be down and what configuration options are available for each WSN node.
WSN Dynamic Configuration Properties
Properties are set by using the I/O Variables to communicate with the nodes. The base URL for configuring settings has the following format:
ni.var.io://<IP address or localhost>
From this URL address properties can be found by casting it to a more specific type such as a specific WSN node or generic properties for all nodes.
WSN Dynamic Data
Data from physical analog and digital data from the nodes can be obtained by a layer in I/O Variables called NI-PSP. The SVE uses the NI Publish-Subscribe Protocol (NI-PSP) data transfer protocol to write and allow users to read live data. The base URL for aquiring data is in the following format:
ni.var.psp://<IP address or localhost>/<Node>....
From this URL address data variables can be obtained, names of the data, and data type. Once this is known data of interest can be read.
Requirements
Filename: wsn_dynamic.zip
Software Requirements
Application Software: LabVIEW Base Development System 2009 SP1
Toolkits and Add-Ons: LabVIEW Real-Time Module 2009 SP1
Language(s): LabVIEW
Hardware Requirements
Hardware Group: Real-Time (RT)
Hardware Model: NI 9792, NI WSN-3202, NI WSN-3202 (programmable), NI WSN-3212, NI WSN-3212 (programmable), NI WSN-3226, NI WSN-3226 (programmable)
Driver: NI-WSN 1.2
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