Press the button on the Proto Board to cycle through each of the available sensor
readings and watch Portal graph the associated information. Notice that multiple readings
can be displayed concurrently. Every 4 th button press will disable the display of
information.
KEY POINTS:
? SNAP nodes do not require a script to participate in a SNAP meshed network.
? Portal has a built-in Event Log and Data Logger to display information gathered
by any number of SNAP nodes.
Taking a deeper look:
The ability to present event-log messages and display information in the data-
logger can be accomplished using calls to functionality built into the Portal node.
If you peek at the file “ManyMeter.py” you will see this SNAPpy script forwards
data to Portal and instructs it to post it to the log by using a Remote Procedure
Call (RPC). The script will contain a single line of code that reads:
“rpc(portalAddr, "logEvent", eventString)”. This example uses a uni-cast RPC
(single address destination) to call a function directly within the Portal node. This
is explained in detail within the SNAP Reference Manual.
EK2100 Users Guide-v1.5
Page 45
of 53
相关PDF资料
EK2400 EVALUATION KIT W/INTERNET CTRL
EK2505 EVAL KIT FOR SNAP MESH NETWORKNG
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