So, I finally got it. After using a constant frequency shift of 50000 Hz (with the option -fc) I was able to receive all the packages. It seems not to miss any measurement which is really good!
On Thursday, July 21, 2022 at 12:38:01 PM UTC+2 Guido Cioni wrote: > Ok I've solved the issue by re-doing a frequency scan. > The doc are far from clear and I had to do some trial and errors before > finding these frequencies that are working for me > > 868127250, 868247250, 868367250, 868497250, 868657250 > > I still cannot receive outside humidity though. > > On Tuesday, July 19, 2022 at 2:31:18 PM UTC+2 Guido Cioni wrote: > >> I also tried to do a quick scan with the dongle and I can indeed see the >> transmission from the ISS, only rtldavis is not able to get it >> >> here is the waterfall from the dongle >> >> [image: Screen Shot 2022-07-19 at 14.16.19.png] >> >> On Tuesday, July 19, 2022 at 2:07:32 PM UTC+2 Guido Cioni wrote: >> >>> Hey, sorry for not clarifying further and for using this group but I >>> couldn't really find a lot of useful information on -user and it seems that >>> more topics about rtldavis can be found here. >>> >>> I do have quite a lot of experience with rtl dongles (I have about 4 of >>> them active and capturing stuff in different bands), so I know that the >>> problem is not related to that but specifically to rtldavis and/or the >>> associated GO environment. >>> >>> As a matter of fact I use the same dongle to successfully receive data >>> from a Oregon weather station with weewx (using rtl_433), so, as you said, >>> the rtl toolchain is indeed working. >>> >>> I'm indeed in the EU so the frequency should be good (the ISS is also >>> the EU version). >>> >>> >>> *Guido Cioni* >>> >>> >>> On Tue, Jul 19, 2022 at 1:56 PM Greg Troxel <[email protected]> wrote: >>> >>>> >>>> [I'm answering here, but really this belongs on -users!] >>>> >>>> Guido Cioni <[email protected]> writes: >>>> >>>> > I have installed rtldavis as advised >>>> > here https://github.com/lheijst/rtldavis and also took care of >>>> compiling my >>>> > own librtlsdr as advised >>>> > here >>>> https://groups.google.com/g/weewx-development/c/L5Lt8x87I_s/m/PP5AdFnQAQAJ >>>> . >>>> > After doing that I don't get anymore the message "Allocating 1 >>>> zero-copy >>>> > buffers". >>>> > Unfortunately it still does not find the signal from my Vantage Vue >>>> ISS >>>> > that I just turned on with the battery. >>>> >>>> You didn't say what other testing you have done. I would recommend >>>> installing rtl_433 and listening on 433.92 MHz, 315 MHz, 915 MHz if in >>>> the US, and some other set if you are in a different ITU/regulatory >>>> region. (One of the main rtl_433 contributors is in .de, so the docs >>>> should have good hints for Europe (868 MHz?) -- but basically I mean the >>>> license-free frequencies.) >>>> >>>> I hear quite a number of devices that aren't mine. This will let you >>>> know if your dongle and toolchain is working. You can also assess >>>> frequency stability. The cheap dongles are cheap! I have two of those >>>> and one "NESDR SMArTee v2" which has a TCXO. >>>> >>>> Your log shows 868 MHz. That seems like EU, and I wonder if you are >>>> sure that your ISS is the EU version. They are on 915 in the US. >>>> >>>> I also hear people say that the dongle should be remoted from the RPI >>>> via a USB cable, to reduce noise. >>>> >>>> Take the pi out to 10 feet away from the ISS, line of sight, and try it >>>> there. >>>> >>> -- You received this message because you are subscribed to the Google Groups "weewx-development" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-development/a6884fdb-0cd1-46f8-8084-76027f43250an%40googlegroups.com.
