For the temperature, the components in your model A generate some extra heating. The server has a calibration / compensation layer , common across the various hardware models. This layer is adaptive. The correct value is the one returned by the server, this is why I encourage everyone to use the API for data access.
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Another option: add a DNAT rule to your router, changing any request to Google’s DNS servers into one to the local DNS server. The uradmonitor device will be none the wiser.
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