Christian,
I’d recommend adding ‘append_units_label = False’ on the publish side. This 
will stop the appending of units to the label and you won’t have to rename 
them on the subscribing side.

I’d expect the subscribing config to look something like this.

[MQTTSubscribeDriver]
    driver = user.MQTTSubscribe

    host = 
    
    [[message_callback]]
        type = json
    
    [[topics]]
        unit_system = METRIC
        [[[weather/loop]]]

If you post the log from startup through one archive period, I could dig 
deeper.

Important note, with the set up above, I believe you are publishing archive 
records. These are received and put into loop packets by MQTTSubscribe. 
WeeWX would then create archive records out of them. I think this should 
all work, but there might be some timing issues. The log would show what is 
going on.
I do have alpha/experimental code that would receive the MQTT payload and 
process it as an archive record. It would very much be “use at your own 
risk”.
- rich

On Friday, 5 March 2021 at 09:05:50 UTC-5 [email protected] wrote:

> ok, i installed the receiver Weewx new from scratch. No it seems to work 
> without errors.
> I See in the (debugLevel 2) the incoming MQTTValues. But they don't where 
> displayed in the screen. It seems, there is one point missing.
>
> Regards
> Christian 
>
> [email protected] schrieb am Freitag, 5. März 2021 um 14:32:15 UTC+1:
>
>> a driver creates the original packet with a timestamp, a service changes 
>> (usually adds to) the existing packet.
>> some modules, like gw1000, can be configured to be in either mode (i.e. 
>> originate packets, or augment existing packets produced by some other 
>> driver). i do this, with vantage as driver and gw1000 in service mode
>>
>> On 5 Mar 2021, at 10:59 pm, Christian Radermacher <
>> [email protected]> wrote:
>>
>> In which case I user Service, in which case I use driver?
>>
>>
>>

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