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  • Camp Features

    I have some plans for this. But it will take some work/time.

  • v1.446/445/444

    From the CHANGE_LOG file. Not a lot new here. Except for days of tedious checking for memory errors (buffer overruns) and memory leaks to rule out a possible cause of the Windows 10 audio problems.

    v1.446 March 28, 2021

      WSPR extension:

        By request: Added 6 & 13 MHz ISM bands (UK balloon-mobile operation).

        Can restart autorun decoders via an admin page button instead of server restart.


      Windows 10 audio "popping" problem:

        Looked for memory addressing errors and leaks with the Clang address sanitizer.

        A few minor issues fixed but nothing that changes the audio problem.

        This was expected, but also had to be ruled out.

    v1.445 March 24, 2021

      SNR measurement:

        Take transverter frequency offset into account.

        Display SNR value(s) on user (top bar) and admin pages (status tab).

      Added SAM PLL loop control to audio tab.

        Has a slow loop setting "DX" that can be used to better track weak stations.

    v1.444 March 23, 2021

      Include two most recent SNR values in /status query. This implies all the SNR values

        for public Kiwis will be aggregated in the rx.kiwisdr.com/index.html file

        HTML comments.


      TDoA extension:

        Improved help panel contents.

        Added warning against prematurely using too many sampling stations because of

          the large number of computation timeouts we see on the server.

  • v1.437 From Marco, IS0KYB: AGC threshold bar, Passband overload mute

    From the CHANGE_LOG file:

    v1.437 March 6, 2021

      From Marco, IS0KYB (thanks Marco!)

        AGC threshold bar added to S-meter:

          The white bar appearing above the green S-meter bar is the AGC threshold value

          (from control panel AGC tab). The threshold dBm value can read on the

          S-meter scale in equivalent S-units.

        Passband overload mute:

          Mutes the audio when the signal level in the passband exceeds a set value.

          The value is defined by a new setting on the admin page config tab.

          When active a "!" appears in place of the mute icon on main control panel.

          Useful for example when a nearby transmitter would otherwise result in a

          loud annoying signal. Mute recovery time uses existing squelch tail setting.


      Added list of code contributors to _COPYRIGHT file.

        Work in progress. If we missed your code contribution please email us.

        We have hundreds of github issues and thousands of emails and forum posts to review.

      Typing '/' alone into frequency box will restore the passband to the default value

        for the current mode. Shortcut to shift-clicking over a mode button.

      FFT extension: add help button, URL parameters, preset for RTZ.

      Add mouseover popups to more buttons and menus on main control panel.

      Removed more references to sdr.hu

  • v1.352: new time station extension (timecode decoder)

    v1.433 February 12, 2021

      Timecode extension improvements:

        Support for JJY(Japan), RBU(Moscow), RTZ(Irkutsk), BPC(China) added.

        While running AGC delay is temporarily increased to improve noise immunity.

  • Damage due to nearby lightning strike

  • KiwiSDR production status and availability

    Seeed has been forced to raise Kiwi prices on their website by 15% due to the ongoing semiconductor supply issues.

    But there are still plenty of units at old the old prices from distributors. So do some shopping around. Remember that Mouser offers free international shipping to many locations for orders over $50. And be careful to consider shipping, tariff/import, VAT/GST and other costs which these days is a large fraction of the device cost (and the latest sign of our failure as a society/species -- but I digress).

  • rx-tx.info: preview/table/map of WebSDR, OpenWebRX & KiwiSDRs

    From the new OpenWebRX fork developer I think: https://rx-tx.info

  • About Python KiwiClient [Kiwi API question]

    The Kiwi protocol requires the client to send "keep alive" messages at least once every 60 seconds. Otherwise it is assumed the client (Javascript in the browser usually) isn't really running even if the web socket connection is still open for some reason. This had to be done in order to prevent connections from remaining open for long periods of time even through no one was really there. If no keep alive is received the connection is closed.

    I don't know if it helps, but I was able to make web socket connections and send Kiwi commands and receive Kiwi sound and waterfall binary data using a program called websocat (web socket concatenate). See: https://github.com/vi/websocat There are binaries available for Windows, Linux and Mac and I was able to run the Mac one without problems.

    So, to connect to a Kiwi and get sound data do something like this from the Mac command line:

    cat snd.ws.txt | websocat_mac -n ws://my_kiwi:8073/12345678/SND

    Where my_kiwi is the name of the Kiwi and the file snd.ws.txt contains these commands to send to the Kiwi:

    SET auth t=kiwi p=

    SET AR OK in=12000 out=44100

    SET squelch=0 max=0

    SET genattn=0

    SET gen=0 mix=-1

    SET ident_user=kiwirecorder.py

    SET mod=am low_cut=-5000 high_cut=5000 freq=7550.000

    SET agc=1 hang=0 thresh=-100 slope=6 decay=1000 manGain=50

    SET keepalive

    12345678 is a number and needs to be unique for each connection (hence a timestamp in msec). The websocat -n argument keeps the connection to the Kiwi open after all the commands in the file are sent. But note the connection will still close because additional SET keepalive commands are not being periodically sent.

    What you will receive from the Kiwi will be a combination of messages and data looking something like this:

    MSG client_public_ip=[your public ip address as seen by the Kiwi]

    MSG rx_chans=4

    MSG chan_no_pwd=0

    MSG chan_no_pwd_true=0

    MSG is_local=0,1

    MSG max_camp=4

    MSG badp=0

    MSG version_maj=1 version_min=447

    MSG load_cfg= (large amount of configuration data omitted)

    MSG center_freq=15000000 bandwidth=30000000 adc_clk_nom=66666600

    MSG audio_init=1 audio_rate=12000 sample_rate=12001.062106

    MSG stats_cb={"ct":4633,"ce":0,"cf":1000,"cc":0,"cu":[51],"cs":[49],"ci":[0],"ac":0,"wc":0,"fc":0,"ah":0,"as":0,"sr":12001.062106,"ga":0,"gt":0,"gg":0,"gf":0,"gc":66.665900,"go":0,"gr":"RF82ci","ad":0,"au":0,"ae":0,"ar":0,"an":4,"an2":32,"ap":[0,7439,0,0],"ai":[0,2121,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"sa":9,"sh":9,"tu":"04:04","tl":"17:04","ti":"NZDT","tn":"Pacific%5c%2fAuckland"}

    SND [binary sound data]

    SND [binary sound data]


    You can do something similar for the waterfall with the command line:

    cat wf.ws.txt | websocat_mac -n ws://my_kiwi:8073/12345678/W/F

    And the wf.ws.txt file:

    SET auth t=kiwi p=

    SET zoom=0 cf=7550.000000

    SET maxdb=-10 mindb=-110

    SET wf_comp=0

    SET wf_speed=1

    SET ident_user=kiwirecorder.py

    SET keepalive

    And you'll receive the waterfall data:

    MSG rx_chans=4

    MSG chan_no_pwd=0

    MSG chan_no_pwd_true=0

    MSG max_camp=4

    MSG badp=0

    MSG version_maj=1 version_min=447

    MSG center_freq=15000000 bandwidth=30000000 adc_clk_nom=66666600

    MSG kiwi_up=1 rx_chan=0

    MSG extint_list_json=%5b%22colormap%22,%22cw_decoder%22,%22devl%22,%22DRM%22,%22fax%22,%22FFT%22,%22fsk%22,%22IBP_scan%22,%22iframe%22,%22iq_display%22,%22loran_c%22,%22navtex%22,%22noise_blank%22,%22noise_filter%22,%22sig_gen%22,%22S_meter%22,%22SSTV%22,%22TDoA%22,%22timecode%22,%22wspr%22%5d

    MSG wf_fft_size=1024 wf_fps=23 wf_fps_max=23 zoom_max=14 rx_chans=4 wf_chans=4 wf_chans_real=4 wf_setup

    MSG zoom=0 start=0

    MSG wf_fps=1

    MSG request_dx_update

    W/F [binary waterfall data]

    W/F [binary waterfall data]


    This discussion is not complete because we need to talk about the parameters for the various SET commands and also the content of the returned binary data. These details are all handled by the kiwiclient / kiwirecorder Python code and that's why you should really try and make an effort to understand it.

  • My KiwiSDR has Died [power supply problem]

    Hi Kevin. When the BBG is running alone, and Ethernet cable hooked up, do you get green and yellow LEDs lit on the Ethernet RJ45 jack? What are the 4 blue status LEDs on the BBG doing?

    On the Kiwi board by itself, can you measure the resistance of the round jack power center pin to ground? Except for an inline choke and 4 caps the power trace goes straight to two pins on the P9 header which feeds the BBG. So when not connected to the BBG it should measure open, more or less. Schematic: http://kiwisdr.com/docs/KiwiSDR/kiwi.schematic.pdf

  • Problem with massive RFI after changing router

    Changing the external SMPS is fine. But there is another issue that is more difficult to deal with. The use of internal DC-to-DC converters (that are also SMPS) directly on the PCB of the device.

    These days it seems a lot more devices, including PC motherboards, are powered with higher voltage from the primary supply. Then high-efficiency "point of load" DC-to-DC converters are used right at the consuming load. In the case of your router the external SMPS is now 12V instead of 5V and there is almost certainly a 12V-to-3.3V (or even less) converter internally (chips don't run on 5V these days and in many cases don't run on 3.3V either except maybe for I/O).