Using Fine Offset WH24 protocol with WH65B sensor array

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StephenR0

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Oct 22, 2018, 4:41:39 PM10/22/18
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While trying to use the data from my WH65B sensor array with an Ambient Weather WS-2902A weather station, it's become clear that there is a difference in the wind speed factor.  The WH24 uses a wind speed factor of 1.12 and I seem to need a wind speed factor of 0.51 to match my WS-2902A console values.  This applies to both wind and gust values.  Basically, I've just modified fineoffset.c to return all of the raw values so I can use them in a spreadsheet.  So far, the other values seem to be correct, although I can't check the rain values because we haven't had any lately.  I've also discovered that there's a slight difference in the calculation of lux to W/m^2.  The documentation says Lux to W/m2 = Lux/126 (or Lux to W/m2 = Lux*0.00794).  I get something like Lux to W/m2 = Lux*0.007893.  But this is more an issue for any program that uses the data.  I'm not sure what you want to do with this information.  It looks to me that Fine Offset may use the same protocol for its various sensor arrays, but change the wind speed factor for the hardware.  I've sent email to Fine Offset to see if they will send me a version of the spreadsheet for my sensor array.  But I haven't heard back from them.  I probably don't really need them to figure all this out, anyway.  Well, there it is.  I'll leave it to you to rationalize this in the code.
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