Harold Hallikainen wrote:

>> Is there a low-quantity way (low production numbers) to use an RFID to
>> read the state of a switch, i.e. no battery at the "sender" at the
>> switch? Range would have to be something like a meter, reliability
>> rather good. 
> 
> I haven't looked for anything like that, but it seems possible a standard
> passive RFID could handle that. Whether such a tag exists, though, I
> dunno! In my application, I just had to read the insternational standard
> cow number (something like 10 digits) from the tag.

Yes... I think it should be possible, the question (I think) is more about
where to get the tags and the reader module (FCC certified) for a decent
price for low volumes.

Guess I have to wait until I can reuse the tags from the grocery store :)

Gerhard

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