Hi,

Look at the days when you see rain. Does it distribute the same way on WeeWX 
and WU?

Let's say WU is correct and the ATMOCOM driver has an issue. So WeeWX receives 
a wrong value or amount of values.

I have seen before with interceptor, that it has received old packets for some 
reason. It caused the daily total rain value to jump let's say from 0.3 to 0.2 
what shouldn't happen in reality. The Interceptor driver was written to handle 
it as a change of day or change of year, it wasn't expecting similar in any 
other case. The worst part was that when from 0.2 it received a 0.3 value, so 
it has triggered another +0.1 for WeeWX's daily count. It caused the WeeWX 
values to increase/change in a different way than the WU values.
WU showed the rain stopped at 10AM, meanwhile WeeWX showed rain all day long.

Solution in my case was to add an extra line to the interceptor to check time 
stamps of the packets and refuse the old ones to be processed. 

Best Regards,

Gabor Szabados 

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