HOW TO ACTIVATE THE MLAT FOR RADARBOX24

[Runway 31]

I suggest you ask Airnav

Alan

[391P]

Hello everyone. Hi @abcd567 and @Runway31.

I've had a station for a few years, but it never ran properly. Now I have redone everything in the last few days, replaced the hardware and apart from the MLAT service, I am very satisfied. Can you help me? MLAT active (No stations synced).

Result of (sudo systemctl status rbfeeder | sed ‘s/ / /’):

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CGroup: /system.slice/rbfeeder.service
             ├─591 /usr/bin/rbfeeder
             └─603 /usr/bin/dump1090-rb --write-json /dev/shm/ --net --quiet --mlat --forward-mlat --net-bo-port 30105 --lat 52.XXXXX --lon 9.XXXXX --modeac --fix --adaptive-burst --adaptive-range -gnss
I made the settings for the position via the interface. Values anonymised:

Result of (sudo nano /etc/rbfeeder.ini):

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[client]
network_mode=false
log_file=/var/log/rbfeeder.log

key=dxxxxxxxxxxxxxxxxxxxxxxx
sn=EXTRPI027193
lat=52.XXXXX
lon=9.XXXXX
alt=69

[mlat]
autostart_mlat=true
#mlat_cmd=/usr/bin/python3.9 /usr/bin/mlat-client

[dump978]
#dump978_enabled=true
I have also reinstalled the MLAT service:

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sudo apt purge mlat-client
sudo apt clean
sudo apt install mlat-client   
sudo reboot 
Of course, I also rebooted the Raspberry and gave it some time to boot up and start all services. If you still have questions about the current system:

Result of (cat /etc/os-release):

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RETTY_NAME="Debian GNU/Linux 12 (bookworm)’
NAME="Debian GNU/Linux’
VERSION_ID="12’
VERSION="12 (bookworm)’
VERSION_CODENAME=bookworm
If you want to know which station it's about, have a look here: https://www.airnavradar.com/stations/EXTRPI027193

I would be grateful if you could help. Now I would like to have all services running and not a ‘half-finished state’ like before.

Greetings
391P

[Runway 31]

Hi 391P

Would I be correct in thinking you are using an older version of the Pi OS??  Reason I was asking is that the MLAT client is now within the latest version of the RB software  see reply 9 of this thread https://forum.airnavradar.com/index.php?topic=107991.0

Only thing I can see so far is this from a previous post from abcd which will be helpful if using an older Pi os version

Python version entry in file /etc/rbfeeder.ini is by default commented out (see screenshot below which shows a # at start of mlat line). The rbfeeder  uses the version of python which is installed matching with OS version. Please do NOT remove # from start of mlat-line of file /etc/rbfeeder.ini...

Maybe worthwhile commenting it out

Alan

[391P]

Hi Runway31.
Thanks for the tip. That was a mistake on my part when transferring it to the post. The value is correct in the *.ini! I have just checked the Phython version, it is 3.11.2 installed.
Greetings
391P

PS: I have noticed that the data statistics do not register / record any values for MLAT.

[Runway 31]

See the amendment I made to my post

Alan

[391P]

I have also updated content.

Result of (cat /proc/device-tree/model; echo);

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Raspberry Pi 3 Model B Rev 1.2
Result of (uname -m):

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aarch64
Result of (python --version):

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Python 3.11.2
Result of (rbfeeder --version):

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RBFeeder v1.0.11 (build 20241022110000)
I have now installed all updates again and restarted. Let's see if the MLAT starts now. You can see the status on the website of the station. I won't be able to reply until tomorrow ;-)

sudo apt update
sudo apt full-upgrade

Greetings
391P

[Runway 31]

MLAT is active on your station with 54 synced

Alan

[391P]

Hi @Runway31

Thank you for the positive feedback. I noticed today that the first MLAT data packets were sent after updating the Raspberry yesterday. In the last few hours, however, the station has continued without successful synchronization.

That's why I sent an email to support a few hours ago. After I had no idea what could be wrong with the configuration - because MLAT data was also sent in the meantime.

Great! Now it works. I would still be interested to know what the missing piece of the puzzle was or it simply takes a while for Airnavradar to release the function...

In the same way, after restarting the Rapsberry several times, the error message appears that the sharing key is invalid. But after about 30 minutes everything is fine again.

Greetings
391P

[Runway 31]

I would be interested to find out myself, I have a suspicion there was something wrong at the server end

Alan