[XCSSA] OT: simple, reliable wireless sensors

[xcssa@xcssa.org]

There are wireless switches requiring no battery/electrical power supply 
- they use a piezoelectric crystal, so that power is generated when the 
switch is compressed.  I don't remember the supplier but they have a 
selection of light switches which they currently market. 
-Kevin

xcssa-admin@xcssa.org wrote:

>On Friday 13 October 2006 04:24 am, xcssa-admin@xcssa.org wrote:
>  
>
>>Hey folks,
>>
>>Supposing that I could not run wire to all the NC sensors I want to
>>deploy without drilling holes and running cable, what would be a
>>relatively inexpensive wireless communication protocol that only needs
>>to transmit a short-range binary signal (open/closed), without
>>interfering with extant 802.11 and 5.2GHz ranges?  I have a ham
>>license but don't want to use the spectrum as a trash bin.
>>    
>>
>
>BTW folks.. Travis is referring to "normally closed" home security/intrusion 
>switches here.
>
>Travis.. I am shocked that you're even asking this!  Using wireless for you 
>security opens yourself up to an RF DoS that will make your place totally 
>intrusion hackable.
>
>Second... the problem with a wireless solution is that your security is now 
>going to be tied to your ability to monitor/replace batteries as needed (or 
>be dependant upon AC power which can be shut off).  Solar is an option... as 
>long as the thieves don't find out about it an DoS your sunlight/charge path.
>
>Third, if you want to extend power.. you should move from a NC config to a NO 
>config (for obvious reasons).
>
>If you can work around (or come to grips) with the issues above, then I'll 
>help you with the RF/comm side of the equation.
>
>Tweeks
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