require additional external sensors. Max. Number of stations reached

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Michael

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Jun 29, 2019, 1:27:23 PM6/29/19
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Hello,
I use as weather station TFA-Nexus with 5 external sensors (temperature+humidity). Now it is so that these 5 external sensors are not sufficient and I would like to integrate further external sensors. The TFA-Nexus only supports 5 external sensors.
Weewx runs on a Raspi 3b
If I understand all this correctly I need another Raspi and a USB stick that can receive 433 MHz and 868 MHz data and of course more sensors.
The goal is to use up to 8 more external sensors.
Now my questions:
How are these other sensors differentiated? Does each sensor have an individual feature which can be read out (e.g. serial number)?
Can anyone recommend me a USB stick and external sensors?
How can I ensure that the new sensors do not overlap with the already existing sensors, or that confusion can occur?

Only as a clarification. I want to keep the existing weather station and the data of the new sensors should only be displayed in weewx.

Many thanks for your tips and hints.

Translated with www.DeepL.com/Translator

Michael

p q

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Jun 29, 2019, 2:11:25 PM6/29/19
to weewx...@googlegroups.com
You don't have to go with commercial sensors and SDR. And you don't need another raspberry Pi. Google for Raspberry Pi weather sensors and you should be able find some examples:

I added my own extra temperature sensor. Project here:  https://hackaday.io/project/101680-solar-powered-wifi-temperature-sensor-for-weewx


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Peter Quinn
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mwall

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Jul 3, 2019, 11:55:29 PM7/3/19
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On Saturday, June 29, 2019 at 1:27:23 PM UTC-4, Michael wrote:

The goal is to use up to 8 more external sensors.
Now my questions:
How are these other sensors differentiated? Does each sensor have an individual feature which can be read out (e.g. serial number)?
Can anyone recommend me a USB stick and external sensors?
How can I ensure that the new sensors do not overlap with the already existing sensors, or that confusion can occur?

you can easily add more sensors with a USB SDR - just run another instance of weewx on the same pi, and add any number of sensors.  keep the weather station configuration as-is.  here is a general guide to different ways you can collect data from multiple sensors:


and this is a general guide for how to combine the data:


here is an explicit example of how to do it using temperature and humidity sensors from acurite or from fine offset:


sensors from other vendors work in a similar way.

m

Michael

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Jul 7, 2019, 9:50:28 AM7/7/19
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Hi Peter,

thank you very much for your answer. the projects sound interesting, but they are not really something for me...too much self-made ;)

Am Samstag, 29. Juni 2019 20:11:25 UTC+2 schrieb p q:
You don't have to go with commercial sensors and SDR. And you don't need another raspberry Pi. Google for Raspberry Pi weather sensors and you should be able find some examples:

I added my own extra temperature sensor. Project here:  https://hackaday.io/project/101680-solar-powered-wifi-temperature-sensor-for-weewx


On Sat, Jun 29, 2019 at 10:27 AM Michael <wee...@gmx.de> wrote:
Hello,
I use as weather station TFA-Nexus with 5 external sensors (temperature+humidity). Now it is so that these 5 external sensors are not sufficient and I would like to integrate further external sensors. The TFA-Nexus only supports 5 external sensors.
Weewx runs on a Raspi 3b
If I understand all this correctly I need another Raspi and a USB stick that can receive 433 MHz and 868 MHz data and of course more sensors.
The goal is to use up to 8 more external sensors.
Now my questions:
How are these other sensors differentiated? Does each sensor have an individual feature which can be read out (e.g. serial number)?
Can anyone recommend me a USB stick and external sensors?
How can I ensure that the new sensors do not overlap with the already existing sensors, or that confusion can occur?

Only as a clarification. I want to keep the existing weather station and the data of the new sensors should only be displayed in weewx.

Many thanks for your tips and hints.

Translated with www.DeepL.com/Translator

Michael

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Peter Quinn
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Michael

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Jul 7, 2019, 9:52:44 AM7/7/19
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Hi m,

thank you very much for your answer. that's exactly what i was looking for. now just read, understand and put into action
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