Installing rtl-sdr and rtl-433 on Raspberry Pi

[Gert Andersen]

Hi

I'm new to WeeWx and I'm trying to install the SDR software. I have followed this guide https://github.com/weewx/weewx/wiki/sdr-rpi-recipe. I get an error as You can see on the screenshot.

It is the first time I'm using the SDR software, so I really don't know where to look.

Any ideas and thanks for your help?

Rgds

Gert

[steeple ian]

Hi Gert,

Have you tried to blacklist? See the trouble shooting section at the end of the recipe instructions.

Ian

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[Gert Andersen]

Hi Ian

Thanks for the tip. I have overlooked that part.

Now I just need to shift the the right freq. I need 868 MHz instead of 433Mhz

Rgds

Gert 

[steeple ian]

    driver = user.sdr

    path = /usr/local/bin

    cmd = rtl_433 -f 868M -s 1024k -M utc -F json -R 78

    

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[steeple ian]

[steeple ian]

Sensor map something like this:-

[[sensor_map]]

        

        outTemp = temperature.71.FOWH65BPacket

        windSpeed = wind_speed.71.FOWH65BPacket

        UV = uv_index.71.FOWH65BPacket

        light = light.71.FOWH65BPacket

        outBatteryStatus = battery.71.FOWH65BPacket

        outHumidity = humidity.71.FOWH65BPacket

        windDir = wind_dir.71.FOWH65BPacket

        windGust = wind_gust.71.FOWH65BPacket

        rain_total = rain_total.71.FOWH65BPacket

        inTemp = temperature.233.FOWH32BPacket

        inHumidity = humidity.233.FOWH32BPacket

        barometer = pressure.233.FOWH32BPacket

        inTempBatteryStatus = battery.233.FOWH32BPacket

Then in calibrate section:-

[StdCalibrate]

    

    [[Corrections]]

        # For each type, an arbitrary calibration expression can be given.

        # It should be in the units defined in the StdConvert section.

        # Example:

        foo = foo + 0.2

        radiation = light * 0.007893 if light is not None else None

[Gert Andersen]

Hi Ian

Great, up and running with 868MHz.

Rgds

Gert

On Thursday, December 12, 2019 at 11:48:22 AM UTC+1, Gert Andersen wrote:

[Gert Andersen]

Hi

I have tried to find sensors with this command:

rtl_433 -f 868M -s 1024k -M utc -F json -R 78

But I don't find any sensors, just 

pulse_FSK_detect(): Maximum number of pulses reached?

I have attached a screenshot.

Any ideas.

Rgds

Gert

On Thursday, December 12, 2019 at 11:48:22 AM UTC+1, Gert Andersen wrote:

[rich T]

If you can moved the dongle to a windows machine and run SDRSharp or if you have GQRX installed on the RPI run that. Tune to  the frequency and verify the strength of the signal.  Just to make sure you are receiving a strong signal.

[Gert Andersen]

Hi

Thanks for your effort.

Are we talking about this? See Screenshot

Rgds

Gert

On Thursday, December 12, 2019 at 11:48:22 AM UTC+1, Gert Andersen wrote:

[rich T]

Yes that is the software. Set the radio to NFM and start the radio.  You should see the noise floor and the station when it transmits.

[rich T]

Here is what it would look like running.  I'm looking a 433 sensors; did not allow the SDR to warm up, so the frequencies is a little off.

[Gert Andersen]

Hi

The dongle inserted into the pc and I started the radio with NFM and the message is: No Device Selected

Gert

On Thursday, December 12, 2019 at 11:48:22 AM UTC+1, Gert Andersen wrote:

[rich T]

Okay … Did you install the zadig driver?

https://oneguyoneblog.com/2016/09/15/sdrsharp-sdr-installing-windows-10/

[Gert Andersen]

Hi 

Thanks for the tip regarding the driver.

Now I get this. I don't know what it means, see screenshot

Rgds

Gert

On Thursday, December 12, 2019 at 11:48:22 AM UTC+1, Gert Andersen wrote:

[Gert Andersen]

Hi

I think I have come a little bit closer. I can see the different sensors and I can see their mapping. 

There are some things I can't figure out though. My reports do not show the data that the sensors show I and can't find pressure mapping. In addition, it is necessary to unplug the dongle and reinsert it, to make it work. About this Matthew writes:

"I have had problems running rtl-sdr on systems with libusb 1.0.11. The rtl_433 command craps out with a segmentation fault, and the rtl_test command sometimes leaves the dongle in a weird state that can be cleared only by unplugging then replugging the dongle .

Using a more recent version of libusb (e.g., 1.0.20) seems to clear things up. "

I don't know how to install a newer version.

Attached relevant screenshots.

Any help really appreciated

I do not know what to do without this group and the people who tried to help. Thank you.

Rgds

Gert

On Thursday, December 12, 2019 at 11:48:22 AM UTC+1, Gert Andersen wrote:

[rich T]

For updating

sudo apt-get update

sudo apt-get upgrade

Your pressure comes from the console not the outdoor sensors.

On Sunday, December 15, 2019 at 11:36:12 AM UTC-5, Gert Andersen wrote:

[Gert Andersen]

Hi Again

After trying many different things, i found that if i run a usbreset every time i start up SDR, it seems to have helped. 

Now I get data for the Standard reports, but Rain Rate and Daily Rain are wrong. Although it has not rained, I have a value for RR and DR. 

I've attached rain-test-packets.log where I've run weewx manually. Until 12:26:37 DR shows 0.12, although it has not rained today. At 12:26:37  I poured water into the bucket, maybe 3 tips and DR went from 0.12 to 0.16. 

The standard report shows DR 2026.2mm and RR 533. Although it still hasn't rained, the last report shows DR 2135.9mm and RR 373.9mm / h. When 

If I run SDR via weewx, DR looks real, output.txt (rain_total.157.FOWH65BPacket': 4.064)

What have I missed, feeling I'm very close now.

Thanks for your support.

Gert

On Thursday, December 12, 2019 at 11:48:22 AM UTC+1, Gert Andersen wrote:

[Gert Andersen]

Hi

I have started to upload to a web server. The rain data still wrong and it seems to change all the time.

Website: http://vejret.lynghuzed.dk

Anything I can do?

Gert

On Thursday, December 12, 2019 at 11:48:22 AM UTC+1, Gert Andersen wrote:

[Gert Andersen]

Hi 

I forgot to mention that I also have a Ecowitt GW-1000 uploading to ecowiit.net and it seems to upload the data fine, also the rain data.

Gert

On Thursday, December 12, 2019 at 11:48:22 AM UTC+1, Gert Andersen wrote:

[mwall]

On Monday, December 16, 2019 at 7:22:43 AM UTC-5, Gert Andersen wrote:

Now I get data for the Standard reports, but Rain Rate and Daily Rain are wrong. Although it has not rained, I have a value for RR and DR. 

that is because you have assigned 'rain' to be 'rain_total'.  

you do not need (and should not specify) 'rain' in the sensor_map, but you should specify 'rain_total' in the sensor map.

'rain' is a delta measurement (amount of rain in a period), whereas 'rain_total' is a cumulative measurement (total amount of rain).

'rain' is calculated from 'rain_total'.  in the weewx-sdr driver, this is handle by the 'deltas' definition.  see the comments in the sdr.py code for details.

this is what you want:

[SDR]
    ...
    [[sensor_map]]
        ...
        rain_total = rain_total.157.FOWH65BPacket

m

[Gert Andersen]

Hi Matthew

Thanks a lot, it's working now.

Rgds

Gert