The power supplies included in the EK2500 kit can be used with either of the included
nodes, but be aware of the different input voltage ranges if you substitute your own
external power supplies.
The SN171 can also be powered by two AA batteries; an external battery holder for this
purpose is also included in the EK2500 kit.
The third SNAP Device in this evaluation kit is either an SN132 SNAP Stick USB
Carrier Module with a SNAP Engine, or an SS200 SNAP Stick. Either of these plugs into
a USB port on your PC to act as the bridge node between Portal (or SNAP Connect) and
the rest of your wireless network. (For the remainder of this document, this third SNAP
Device will be referred to as your “bridge device” or “bridge node”.)
Taking the Nodes for a “Test Drive”
All three nodes come from the factory preloaded with a demo SNAPpy script. Although
this demo script showcases only a tiny portion of the capabilities of a SNAP node, it
provides a quick way to get familiar with the nodes without having to install any software
on your PC. (We’ll install the Portal software in a later step.)
If you haven’t already done so, power up the bridge device by connecting it to a USB
port on your PC. (If the “Found New Hardware” wizard appears, just click “Cancel” – we
don’t want to install that software yet).
Power up the SN111 End Device Demonstration Board by connecting it to one of the
two included “wall transformer” power supplies provided in the kit, and sliding the on/off
switch to the “on” position.
Power up the SN171 Proto Board node by connecting it to the other “wall transformer”
power supply.
Note: The SN171 Proto Board does not have a dedicated on/off switch. You
simply disconnect the external power supply to turn the unit “off”.
The yellow LEDs on the SN111 and SN171 boards should now be blinking once every
second. This shows that the preinstalled demo SNAPpy scripts in all three nodes are
running. No LED will blink on the bridge device (though a green power LED will light if
you have the SN132 board).
In addition, the green “external power” LED on the larger board (the SN111 node) should
be on, indicating an external power supply is connected and providing power.
On the node with the seven-segment display, “00” should be displayed. This shows that
the pre-loaded SNAPpy script is running. (It put the “00” pattern on the display.)
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EK2500 Users Guide-v1.7