Anyone tested airspy_adsb on a RK3588 ?
The AirSpy mini was defective. I received a replacement unit and this one works like a charm!
EDIT 1: How can I find thge best OPTIONS partameters? I currently use:
OPTIONS= -v -t 90 -f 1 -w 5 -P 6 -C 95 -b
EDIT 2: I donāt get MLAT to work. Any ideas?
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Congrats
I had never above 2970
Wow, I am impressed. (perhaps a little bit jealous as well 
). My max is 2376
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Please record a few seconds when you reach that peak again.
Hi,
Last time, you asked about adsb experience on RK3588.
Isnāt it an overkill for dedicated ads-b decoding? 
Any new developments regarding Airspy mini?, just curious:)
I will do if I happen to see it live. It was only for a brief period and I saw it on the graphs afterwards. The extra messages were a ton of extra DF11s:
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It all depends on the use case. That SBC can easily be shared across multiple services.
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Maybe something will show up with a high activity dump file. For the time being, we are already in the diminishing returns zone.
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Pretty much useless at this point.
Any suggestion on what to set my gain to?
If you are using airspy_adsb then just use the auto gain and let it sort itself out. It does a good job of selecting an appropriate level for the majority of cases.
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I did have this one but seemed to not be doing too great, as I understanding you want the weakest level to be around -30, I have got close to this by manually set 21 in the gain but any other setting takes me around the -42 or lower mark it seems
That doesnāt really apply to the airspy since it has a different ADC with higher dynamic range. Performance is far less sensitive to gain than the rtl dongles are because of that.
I did some testing on this a while back and found that as long as the gain is roughly right, you arenāt going to be losing much because of it. Itās only when itās drastically too low or high that you are likely to see much performance difference.
That graph is also not a direct measure of the received signal strength for the airspy, but is mapped to produce an output that is compatible for use with graphs1090 and some other scripts which make use of it. The graphs which show the actual received signal strengths for airspy are further down the page like this:
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Hi,
I have a Pi4B with a fresh install of PiAware 8.2. With the orange FA dongle, the setup was able to receive the ADSB signals. Afterwards, I installed an Airspy Mini (removing the orange FA dongle). I noticed that about half of the previous flight traffic was being displayed even without using the install script.
After using the install script (from GitHub - wiedehopf/airspy-conf: Configure airspy_adsb for use with readsb or piaware.), and following the installation steps listed, the dreaded AIRSPY_ERROR_NOT_FOUND appeared in the output of āsudo journalctl -e -u airspy_adsbā. I have tried multiple reboots, but the AIRSPY_ERROR_NOT_FOUND messages persist. I also tried the USB2 and USB3 ports. Thereās no LNA attached.
I have not modified /etc/default/airspy_adsb file.
The output from lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I donāt have access to a windows PC. Iām using a MAC. When connecting one of the Airspy mini to the MAC, a security window appears with:
Do you want to connect Realtek RTL2838UHIDIR to this Mac?
I did buy the two Airspy minis from Amazon. Both exhibit the same behavior. Hereās the Amazon link.
RTL-SDR Blog V3 R860 RTL2832U 1PPM TCXO SMA Software Defined Radio (Dongle Only) (Black)
https://a.co/d/1TTPVQ1
Is it possible that they are fake? They look exactly like the pictures on Amazon and Airspy.
It looks like they are probably fake. lsusb should show:
Bus 001 Device 003: ID 1d50:60a1 OpenMoko, Inc. Airspy
If it shows as an rtlsdr, then that is not correct and would explain why the airspy decoder is not finding an airspy. You also should not be seeing results directly in dump1090 as that canāt use the airspy. You saw output prior to running the airspy install script which also indicates they are probably rtl dongles dressed up to look like airspys.
That Amazon link is not to an Airspy mini.
It is to an RTL-SDR Blog V3.
How, please let me know the setup? I use an Airspy Mini with RTL Tripple filtered LNA and a 5 DB aerial.
http://www.pliw.co.uk/graphs1090/
2750 has been my max as a one off