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hardwarerelated:ham_radio:rtl-sdr

Software Defined Radio

  • my devices:
    • RTL-SDR Blog V4 R828D RTL2832U 1PPM TCXO SMA Software Defined Radio with Dipole Antenna, USD $39.95
    • RTL-SDR Blog SMA Straight Antenna Adapter Set, USD $14.95
  • Fedora:
    • gnuradio: allrounder software, dnf -y install gnuradio-examples gr-osmosdr rtl-sdr
    • gqrx: watching the spectrum, dnf -y install gqrx
    • SDR++ dnf install sdrpp (not outputting audio to my hdmi audio sink)
    • SDR-Angel: mostly for recording & analyzing
    • Universal Radio Hacker: mostly for recording & analyzing
    • rtl_433: mostly for recording & analyzing
  • Kali Linux
    • Convenient as kismet brings in plugins already for ADSB scanning (planes), also AMR
    • apt install rtl-433 rtl-sdr bladerf-firmware gnuradio gqrx-sdr gr-osmosdr
    • install SDR++ (built for debian sid from github)
  • DragonOS

SDR++

..does not provide output to my HDMI output device. Workaround:

  • Start VLC, go to Media→Open Network Stream, check 'Show more options'
  • Enter 'TCP://127.0.0.1:20022' (without quotes) as network URL
  • Set Edit Options: ":demux=rawaud :rawaud-channels=1 :rawaud-samplerate=48000 :rawaud-fourcc=s16l" (without quotes)
  • Enable the TCP server in the SDR plugin, and click Play in VLC

Signals

https://www.tele.soumu.go.jp/resource/search/myuse/use/ika.pdf

freq comment
121,225mhz
125mhz
128.125mhz air
148.160mhz satellite com
157.595mhz, 159.740mhz, 168mhz marine
445.700mhz ham band
446.375mhz ham band
450.947-450.95mhz various/各種用途(固定・移動)・特定小電力
453.818mhz

Japan smart meter (power) research

I have a smart meter for my flat, would be nice to get readings.

  • Device names:
    • 富士電機メーター F6DWF-TA. Transmission probably by 920mhz mesh network wireless (“920MHzメッシュ方式(無線)”), or over power line, or LTE (not likely)
    • Second device: Osaki A6WWA-TA / 4006. For storing power consumption value for 45 days?
  • potential encoding: ANSI C12.22 src
  • potential protocols of my smart meter
  • Wi-SUN(ワイ-サン) might be the protocol in use
    • standardized in: 802.15.4g/e/6LoWPAN
    • Frequency 922.5 ~ 927.9MHz, Modulation Binary GFSK
    • Channel Spacing (KHz): 200, 400, 600, Total Number of channels: 38, 18, 12
    • roles in Wi-SUN setups: ホームICT, HEMS(ヘムス/Home Energy Management System)
  • Current state:
    • I see signals with RTL-SDR, in the frequency area 922.5-927.9MHz (32cm). But trying to record it with urh( Universal Radio Hacker), no signal is detected.
    • Maybe it's not GFSK?
    • Wanted to compare with what others receive on http://rx.linkfanel.net/ , but these devices just go to 30Mhz.
    • Creating a baseband recording (.wav file) and then opening it in https://www.sonicvisualiser.org/ on Linux, the program terminates
hardwarerelated/ham_radio/rtl-sdr.txt · Last modified: 2024/06/30 00:48 by chris