ogn2readsb (aka. ogn2dump1090)

• simple Python tool to inject Open Glider Network Traffic (from an existing local OGN decoder instance) into an existing readsb ADS-B decoder instance for display on a unified tar1090 map
• furthermore online aggregated traffic from OGN will also be injected for a reasonably selected radius around a given location
• OGN traffic will be displayed as other traffic alongside with ADS-B traffic, using the readsb tar1090 webinterface (e.g. https://yourRaspberryPi.local/tar1090/); you can relabel OGN traffic e.g. to OGN by adding jaeroLabel = "OGN"; to /usr/local/share/tar1090/html/config.js

any combination of the following modes is possible, for more details see config.py:

• Read data from ogn-decode telnet port 50001
• Pretend to be an APRS Server and have a locally running ogn-decode connect to it
• Connect to a remote APRS server and subscribe to data from it

If ogn2readsb acts as a local APRS Server AND upstream APRS client in parallel, it will automatically act as an APRS proxy and forward locally received data to OGN upstream.

prerequisites

• running rtlsdr-ogn instance (e.g. based on https://github.com/VirusPilot/ogn-pi34)
• running readsb instance, e.g. based on:
  • https://github.com/wiedehopf/readsb
  • https://github.com/wiedehopf/airspy-conf (in case you are using an AirSpy SDR)

prepare

sudo apt update
sudo apt install python3-pip python3-aiohttp git telnet -y

install python-ogn-client

cd ~/
git clone https://github.com/glidernet/python-ogn-client
cd python-ogn-client/
pip3 install --break-system-packages .

enable local OGN APRS proxy (optional)

you need to add the following line to the OGN APRS configuration section after your station callsign:

APRS:
{
  Call   = "NewOGNrx";
  Server = "localhost:14580";
};

followed by a:

sudo service rtlsdr-ogn restart

modify readsb config

you need to add --net-sbs-jaero-in-port 30008 --jaero-timeout 1 to the NET_OPTIONS section of your readsb configuration:

sudo nano /etc/default/readsb

followed by a:

sudo service readsb restart

install ogn2dump1090 service and adjust settings in config.py

git clone https://github.com/b3nn0/ogn2dump1090
cd ogn2dump1090/
nano config.py

modify the GNSS coordinates in the aprs_subscribe_filter section according to your GNSS station coordinates, e.g "r/48.0/10.0/20" for a 20km radius around your selected location and add a the ICAO code of a nearby airport that provides METAR so that baro and GNSS altitude can be converted by ogn2dump1090

download the latest OGN database:

wget -O ddb.json http://ddb.glidernet.org/download/?j=1

prepare and install ogn2dump1090 service:

OGN2DUMP1090DIR=$(pwd) envsubst < ogn2dump1090.service.template > ogn2dump1090.service
sudo mv ogn2dump1090.service /etc/systemd/system/
sudo systemctl enable ogn2dump1090
sudo systemctl start ogn2dump1090

verify

sudo systemctl status ogn2dump1090
https://yourRaspberryPi.local/tar1090/

OGN database update

the OGN database is not automatically updated, therefore a regular manual update is recommended:

cd ~/ogn2dump1090/
wget -O ddb.json http://ddb.glidernet.org/download/?j=1
sudo systemctl restart ogn2dump1090

readsb/tar1090 database update

the readsb/tar1090 database is not automatically updated, therefore a regular manual update is recommended:

sudo bash -c "$(wget -O - https://github.com/wiedehopf/adsb-scripts/raw/master/readsb-install.sh)"

remarks

• if an OGN traffic target also transmitts Mode-S, the displayed RSSI values are related to the Mode-S signal, not to the OGN signal
• for a fresh install you may consider trying the following script: script that installs rtlsrd-ogn, readsb and ogn2dump1090, a screen recording of all steps required can be found here: https://youtu.be/5kWt9rtBNwU