WeeWX-MQTTSubscribe - Filter unwanted devices

[bryan...@gmail.com]

I'm currently running Weewx 4.9.1 and using WeeWX-MQTTSubscribe to capture data from 2 separate RTL SDR's.  One of the RTL-SDR devices is listening on 433.92 and is picking up weather data from a couple nearby weather stations.  One of the weather stations I'm listening to has a bad wind sensor, so I do not want the wind data from that station, the other station has good wind data so I do want that data.  These two stations are from the same manufacturer and fall under the same device decoding protocol ( [40] Acurite 592TXR Temp/Humidity, 5n1 Weather Station, 6045 Lightning, 899 Rain, 3N1, Atlas).

The other RTL-SDR is listening on 915.00 in order to pick up pressure data from another sensor.

When using 

`rtl_433 -F json -M utc -R 40 | mosquitto_pub -t weather/radio -h localhost -l`

I receive all packets from both stations and pass that to the WeeWX-MQTTSubscribe driver where I have set up the various fields and map them to weewx.  For example, the wind data:

 [[topics]]
        unit_system = US
        [[[weather/radio]]]

... snip ...
                [[[[wind_avg_km_h]]]]
                name = windSpeed

                [[[[wind_dir_deg]]]]
                name = windDir

... snip ...

since both stations emit, for example, 'wind_avg_km_h', I don't have a way to filter out one of them (the bad one) so I end up getting some garbage data in the mix with good data.

My question is this: since these two stations are the same 'device decoding protocol' (40) is there a way to differentiate between the json data coming from the one vs the other?  The both have different [[[[id]]]] fields, the one I want has an ID of 3522 and the one I don't want wind data from is ID 2849. 

Essentially I want to keep data from both devices but exclude just the wind data from one of them.

Thanks much for any help you all can provide.

Bryan

[vince]

Add ignore=true to the ones you want to.....ignore...

        [[[ecowitt/loop]]]
            [[[[outTemp_F]]]]
                name = extraTemp1
                units = degree_F
            [[[[extraTemp5_F]]]] 
                name = extraTemp5
                units = degree_F
            [[[[dateTime]]]]
                ignore = True
            [[[[usUnits]]]]
                ignore = True

[Bryan Parke]

Thanks for the reply, however, if I ignore it, it will ignore it entirely, not just for the one with bad data.  Maybe you didn't see that part of my question.  2 stations are reporting weather data with the same field name wind_avg_km_h  which I map to windSpeed.  One of the stations, with ID 2849 has a bad wind sensor so I want to ignore only the wind data from that station, but want to continue to receive and map the wind data from the other station with ID 3522.

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[bell...@gmail.com]

I use ''rtl_433 -F mqtt://localhost:1883' and it publishes directly to the following topics:
     rtl_433/<hostname>/devices[/type][/model][/subtype][/channel][/id]
     rtl_433/<hostname>/events
     rtl_433/<hostname>/states
I then subscribe to 'rtl_433/<hostname>/devices[/type][/model][/subtype][/channel][/id]' as 'type = individual'.

If you want/need to continue piping to mosquitto_pub, look at https://github.com/bellrichm/WeeWX-MQTTSubscribe/wiki/Configuring-additional-options#msg_id_field. Then you can use the 'ignore' option with the appended 'id'.

rich

[vince]

On Wednesday, November 16, 2022 at 10:06:05 AM UTC-8 bryan...@gmail.com wrote:

Thanks for the reply, however, if I ignore it, it will ignore it entirely, not just for the one with bad data.  Maybe you didn't see that part of my question.  2 stations are reporting weather data with the same field name wind_avg_km_h  which I map to windSpeed.  One of the stations, with ID 2849 has a bad wind sensor so I want to ignore only the wind data from that station, but want to continue to receive and map the wind data from the other station with ID 3522.

No, I read your question.  

What I did here was publish to a different topic from each station. That made it easy to ignore the one I wanted to.

For me, it was something like "weather/radio/12345678" for device id 12345678, as an example.   Each device publishing to MQTT used its unique device id to publish to a device-specific topic.  Then I'd subscribe to only the ones I wanted.

[Bryan Parke]

This is brilliant! Thank you!  I'll give it a shot.

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[Bryan Parke]

Thanks again.  My mistake was using this:

rtl_433 -F json -M utc -d:00000002 -f 915.00M | mosquitto_pub -t weather/radio -h localhost -l

instead of this:

rtl_433 -F "mqtt://localhost:1883,devices=rtl_433[/id]"

Now I'm seeing each separate device as its own topic whereas before they were all landing in weather/radio and I didn't have (or know) a way to filter.  Now I can just ignore anything with device ID 2849 for the wind data.

Thanks again!

Bryan

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