I’ve run a 1090 site for years and want to add 978 to the same Pi. I have a spare FlightWare orange/yellow dongle and a dedicated 978 antenna. I know there are a number of posts on the subject, but I wonder if there is a single ‘guide’ to how to do this with current 7.2 software. Thanks.
Hope this helps…
KB4ERT
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OK, I’ve added my 2nd dongle and antenna and followed the steps. Everything looks like I am monitoring both 979 and1090 now but I don’t see any planes on my 978 map. This could be because there isn’t much GA around here, but I just want to make sure my setup is OK. Here is the status I get from my 978:
pi@piaware:~ $ sudo systemctl status dump978-fa
● dump978-fa.service - dump978 ADS-B UAT receiver
Loaded: loaded (/lib/systemd/system/dump978-fa.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2022-06-28 17:38:38 EDT; 9min ago
Docs: PiAware - ADS-B and MLAT Receiver - FlightAware
Main PID: 821 (dump978-fa)
Tasks: 4 (limit: 2059)
CGroup: /system.slice/dump978-fa.service
└─821 /usr/bin/dump978-fa --raw-port 30978 --json-port 30979 --sdr driver=rtlsdr,serial=00000978
Jun 28 17:38:39 piaware dump978-fa[821]: Reattached kernel driver
Jun 28 17:38:39 piaware dump978-fa[821]: Detached kernel driver
Jun 28 17:38:39 piaware dump978-fa[821]: Found Rafael Micro R820T tuner
Jun 28 17:38:39 piaware dump978-fa[821]: Exact sample rate is: 2083333.135571 Hz
Jun 28 17:38:39 piaware dump978-fa[821]: [R82XX] PLL not locked!
Jun 28 17:38:40 piaware dump978-fa[821]: SoapySDR: using maximum manual gain 49.6 dB
Jun 28 17:38:40 piaware dump978-fa[821]: SoapySDR: using stream setting buffsize=262144
Jun 28 17:38:40 piaware dump978-fa[821]: Allocating 15 zero-copy buffers
Jun 28 17:39:07 piaware dump978-fa[821]: [::]:30978: accepted a connection from [::1]:40646
Jun 28 17:39:37 piaware dump978-fa[821]: [::]:30978: accepted a connection from [::1]:40648
and this is what I get from my 1090:
pi@piaware:~ $ sudo systemctl status dump1090-fa
● dump1090-fa.service - dump1090 ADS-B receiver (FlightAware customization)
Loaded: loaded (/lib/systemd/system/dump1090-fa.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2022-06-28 17:38:29 EDT; 10min ago
Docs: PiAware - ADS-B and MLAT Receiver - FlightAware
Main PID: 760 (dump1090-fa)
Tasks: 3 (limit: 2059)
CGroup: /system.slice/dump1090-fa.service
└─760 /usr/bin/dump1090-fa --quiet --device-type rtlsdr --device-index 00001090 --gain 60 --fix --lat 39.02128 --lon -76.51147 --max-range 360 --net-ro-port
Jun 28 17:38:29 piaware systemd[1]: Started dump1090 ADS-B receiver (FlightAware customization).
Jun 28 17:38:29 piaware dump1090-fa[760]: Tue Jun 28 17:38:29 2022 EDT dump1090-fa 7.2~bpo10+1 starting up.
Jun 28 17:38:29 piaware dump1090-fa[760]: rtlsdr: using device #0: Generic RTL2832U (Realtek, RTL2832U, SN 00001090)
Jun 28 17:38:29 piaware dump1090-fa[760]: Detached kernel driver
Jun 28 17:38:30 piaware dump1090-fa[760]: Found Rafael Micro R820T tuner
Jun 28 17:38:30 piaware dump1090-fa[760]: rtlsdr: tuner gain set to about 58.6 dB (gain step 29) (tuner AGC enabled)
Jun 28 17:38:30 piaware dump1090-fa[760]: Allocating 4 zero-copy buffers
Any obvious problems (like the ‘PLL not locked!’ message)??
Thanks.
Which SDR / antenna?
Where is the antenna located?
Might be necessary to reduce gain.
I’d recommend running graphs1090 and after a day posting the signal graph for 1090 and 978 if you want advice on that.
https://github.com/wiedehopf/graphs1090#graphs1090
My 978 dongle is a orange FlightAware Pro Stick with an AirNav UAT 978 antenna.
My 1090 dongle is a blue FlightAware Pro Stick plus with a sepearte 1090 antenna.
Antenna placement could be better and I’ll work on that.
When I inquire about gain, it reports ‘max’ (not a number like the version 5 instructions say)
Running PiAware 7.2
I’ll get graphs1090
I also live pretty close to a large airport (BWI) so not all that much GA around?
Thanks.
set gain for 978 to 36
set gain for 1090 to 43.9 or auto
@JonAHupp Let that 36 gain run for a few sunny days (not many GA aircraft in poor weather) and then compare to running with 978 gain at around 25.4 for a few days. (That was my UAT sweet spot prior to adding an LNA).
Once you have graphs1090 installed for a couple days, look at where the minimum signal level graph bottoms out. For UAT, around -30 is usually good for most stations. Don’t be too quick to judge a setting. The volume of UAT aircraft is pretty low for most locations.
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