Easiest way to add 978

FlightAware ADS-B Flight Tracking
41

I mentioned recommended values in my last post and linked an entire thread.

It should yes.

42

The only electronic device in the room is the PiAware device, so limited chance of other interference. I have also noticed that my 1090 numbers have gone down by more than 50% since I added UAT on the same Raspberry Pi. My plan was to have an incremental gain in overall receptions, but so far it has been quite disappointing. Also, my question about gain was not what it is, but how do I see what it is currently set to so I can go up and down the scale from it’s current setting.

43 
piaware-config -show rtlsdr-gain
piaware-config -show uat-sdr-gain

max should be 49.6 for UAT/978.
not sure for 1090 max might be agc which can be equated to roughly 55 or so.

44

Both just show “max” (without the quotes), not very helpful, but I appreciate the commands though.

45

But i mentioned what max means in the very same post.

Anyhow just set 1090 to 43.9 and 978 to 36 and start from there.
Then increase / decrease the gain by maybe 3 or 6 points to move the weakest signal around.
For 978 a good place for the weakest signal is -33 or so and for 1090 it’s probaly -29.
(weakest signal in graphs1090)

46

I have all the software now setup and all but my UAT antenna operating. I have temporarily installed one of the cheapy antennas that come with generic RTL-SDR tuners to the UAT receiver until I get the 7 dBi 978 MHz antenna, which should be Tuesday. I just installed a PoE HAT on my Pi4, as I have it installed in an attic space where there is no power connection. To adjust the gain, I installed an automatic gain optimization script. It automatically changed the gain of the ES tuner to 49.6 last night. I do not believe that software works for doing the same on UAT. At the moment, my UAT receiver hasn’t picked anything up but then again, it is dark and nearly 9PM at night. I’ll be curious to see if the cheap little antenna picks up any UAT traffic.

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No it’s 1090 only. .

48

I’ve been operating my UAT now for just under 24 hours. As I expected, there was not much traffic over night but it perked up as the day got brighter.
dump1090-localhost-aircraft_978-24h dump1090-localhost-signal_978-24h

As of this writing, that is tracking 72 aircraft with a piece-of-garbage antenna. The farthest away was 70 miles but the average distance was about 13 nautical miles away. I’m just curious if there is any need to adjust the gain of this or if I should just wait until I get my final and hopefully more capable antenna.

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49

[quote=“abcd567, post:1, topic:48262”]

Hi there. I am not able to get this to work. I get a connection refused error for http://local-ip-of-pi:8978/` and a 404 URL not found for http://local-ip-of-pi/skyview978/

Can someone help correct this please?

Thanks

50

What he is saying is that the Pi computer has an address on your network - called an “ip address”. If you have any kind of default configuration from your internet service provider, your addresses probably look like “192.168.1.123”, “192.168.0.123”, or “10.1.1.123”. (Or a variation of these).

In all cases, every computer on your network will share the first three numbers in the group (xxx.xxx.xxx.123). The last number (192.168.1.xxx) identifies a particular device.

For example, in my case, my internet modem is 192.168.0.1. My Pi is 192.168.0.8. My 978 flight feeder is 192.168.0.11. Your addresses will likely be similar, but different. If you don’t know your local ip address you can go to your FlightAware stats page. When you are logged in, you will see the local address here:

image
image1920×1149 126 KB

Where @abcd567 says “local-ip-of-pi”, you should replace that with the actual address of your pi. So, again, in my case, http://local-ip-of-pi/skyview978/ would translate to http://192.168.0.11/skyview978/

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51

hope it’s ok to piggyback into this, I got here from the same initial error, but have slightly different results.

● dump978-fa.service - dump978 ADS-B UAT receiver
     Loaded: loaded (/lib/systemd/system/dump978-fa.service; enabled; preset: enabled)
     Active: activating (auto-restart) (Result: exit-code) since Tue 2024-04-16 09:22:55 CDT; 18s ago
       Docs: https://flightaware.com/adsb/piaware/
    Process: 7062 ExecStart=/usr/share/dump978-fa/start-dump978-fa (code=exited, status=2)
   Main PID: 7062 (code=exited, status=2)
        CPU: 174ms

my two dongles are serialized, and each runs individually just fine, and they’re listening on their own default ports - but I think I’m getting a conflict and dunno how to resolve it.

52

in regards to this post: I revisited the installation instructions, and found an omitted step. Problem resolved.

53

Seems you omitted 2nd or 3rd (or both) commands in following step:

 

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