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Forum Post: End Device and Access Point conundrum

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I'm attempting to think of a good way to implement an application cleanly in simpliciTI

What we want is

  1. battery powered end point periodically polled and unjoined from a mobile access point
  2. Once an End Points is polled it should be unjoined and not be pollable until other end points are joined and discovered (or better put it won't attempt to join the access point for a long while).
  3. The end point needs to run for a very long time (3-4 years) this way.
  4. Range is relatively short but a lot of end points may be in close proximity (noise interferance)?
  5. frequency hopping is likely necessary
  6. Access point is mobile and is only present to poll end points on a periodic basis (as in it's moved in data collected and then moved out).

Questions (with hopefully answers)

  1. Does reducing transmit power below 0db gain you anything in terms of power savings? <CC1101 specific> (My guess is no although little data is available in the data sheet the only real power savings appears to be reducing powere from positive db output values to lower ones).
  2. Is it possible to broadcast a ping to an End Device from an Access Point? It seems like it should be possible (using SMPL_LINKID_USER_UUD?)
  3. Does it make sense to have a Access Point with a filter (IE keep unwanted End Points from joining it)? (Need to look at how filtering is implemented this seems something a user function may be desireable to do with.)
  4. Does it make sense to reverse the rolls? In simple terms make a non promiscuous Access Point and a Promiscuous End Point and the AP be the battery powered device.

I hope that made sense (sigh).

Stephen


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