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[wxsig] 1-wire UV sensors anyone?

John Bennett jabennett at insightbb.com
Tue Apr 27 02:06:07 UTC 2010

A few years back I looked into this in some detail. Coming up with a 
one-wire interface for UV sensors is easy. The problem I ran into was 
calibration. Without some means of calibrating the sensor, data becomes 
somewhat meaningless. If you get sensors that do have some sort of 
calibration, they are quite expensive and well beyond the basic KISS 
principal on which the one-wire sensors are based.

There is also the question of support. Although there has been enough 
interest to exhaust the supply of EMP sensor kits TAPR offered (and we 
were considering making another run), the fact remains that it is mostly 
an experimental item. While my weather server code supports it, it has 
never been incorporated into the T238.

Therefore with no support either in my code or Will's for a UV sensor, 
the question that begs is how do you get a readout?

I would be interested in pursuing something like this if there was 
enough interest and some calibration scheme that made sense could be 
determined. Then there is also the fact that I need time to do it. My 
present job has me way too busy to start any new projects. I hate being 
negative, but hopefully you can see the problems. I have ideas for other 
sensors, but just have not had the time to devote to them.

If someone out there has any ideas, please throw them out here on the forum.


John Bennett

sbm at ottix.net wrote:
> Hi
>     These days (no pun intended) I'm seeing more and more 1-wire sensors 
> coming into the market.  While shopping around for a rain gauge (found 
> one at hobby boards) I saw they have some of these UV kits.  Are these 
> compatible with the T238+?
> Thanks,
> Bill
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