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/6a4d9128-b6e2-4903-b2c0-2bb10ebd198fn%40googlegroups.com.
