Power on mechanism

Hello

I would like to know if there is any kind of a power programmable mechanism available for nodes. For example, I would be as a node to be off for a few days, turn back the sample at 1 Hz for a few hours and then turn off again for the next few days.  Is it possible to do? (When I say, it shuts down, I don't speak the day before, where he consumed energy by sending a "heartbeat" signal every 61 seconds)

Another question I have is if I cut the bridge for x minutes and then turn it back on again, the end-nodes/routers connect to the network automatically? Is there an upper limit to x?

Thank you

Sravan

To answer your first question, there is no way to have the WSN node powered itself off and then put the new one.  The only thing you can do is to sleep.  I, however, need a separate system that will be poer node on and outside, but it is a system that you would have to build.

The second question is answered in this KB: http://digital.ni.com/public.nsf/allkb/88B2957808343185862575EC00120872?OpenDocument

"After failing to join a network, an end node go to sleep before you try to.
to reconnect. This is done to help save energy. The node will sleep
a greater amount of time between attempts. The nodes using the
Fibonacci sequence (1, 1, 2, 3, 5, 8, 13, 21, 34, 55) to determine the waiting
times. Nodes can wait until 55 minutes between connection attempts. »

I hope that answers your questons.

Tags: NI Products

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