How I know I am home

[Doug Kiekow]

You might be able to get reliable arrival notifications via xbee, but it would be physically somewhat larger. A router can be programmed for join notification (JN) with the join time (NJ) set to always. When the router joins your network the coordinator sends out an api frame. You could trap the frame yourself, or perhaps James could set up a JN similar to the DIO functions. 

With enough computing power someone could probably spoof the join, but it seems unlikely. The downside an xbee with sufficient battery power would probably be the size of a cigarette pack.

Last, you may be able to judge departure by looping a command to the xbee and trapping the error from lack of transmission. The timing would probably be unacceptable.

> On Jun 4, 2015, at 14·37 , George Handley <ghandley at kc.rr.com> wrote:
> 
> , in which case I’ll resort to trying other solutions

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