Hi Gary,
thanks for the informations. Sad that Ecowitt does not give the information 
about heating via the API. But by the way - the little USB-dongle is a 
great solution for getting data from multiple sensors in an accetable way.

... The early hardware/firmware version did not report battery state yet 
>> the Ecowitt gateway API reported 1.6V (presumably as did the gateway device 
>> when it uploads to ecowitt.net). The later version of the WH40 reports 
>> the actual battery voltage in 100mV increments. The Ecowitt gateway driver 
>> should detect the different WH40 hardware/firmware versions and either omit 
>> the WH40 battery state data (early hardware/firmware WH40) or return the 
>> correctly decoded battery voltage (later hardware/firmware WH40). This 
>> capability was added in v0.5.0b5 of the Ecowitt gateway driver so it is 
>> possible there is an error in the driver. Seeing 1.6V makes me suspicious 
>> of Ecowitt reporting non-existent battery data, but 1.44V 
>>
>
 OK, tomorrow I will check the battery-voltage in the rain-sensor with a 
dig. multimeter and report the actual values ...

Best regards
Max

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