Bringing a feeder online using the ADSBx Custom Pi Image requires the following:
Raspberry Pi Computer
The cost of a Pi 4B is typically less than the current cost of a Pi 3B+. For best performance, a Pi 4B is recommended, but other Pi models will work.
Power supply issues are common when using a Pi based receivers and SDR. The Pi 3B+ requires a good 5V 2.5A power supply. The Pi 4B requires 5.1V 3.5A power supply. Clean power is important in maintaining a stable decode.
Official Pi 4 Power Supply: https://amzn.to/2SWFcez
Canakit Pi 4B power supply: https://amzn.to/2WvVAFX
We can’t express enough how important enough power for the Pi SDR combo is, many of the issues feeders have are due to poor power supplies creating under volt or under current anomalies with the Pi.
Antenna & SDR
ADSBx 1090/978 Custom dual band antenna is available on Amazon and ADSBx store.
ADSBx Store: https://bit.ly/33yItFH
Amazon (free shipping with Prime): https://amzn.to/34AI5Hy
Fight Aware Pro Stick Plus ADSB Filter (1090Mhz): https://amzn.com/B01M7REJJW
SMA to N-Type Male: https://amzn.to/2GJBBOH
Using good quality cable is important in optimizing range and decoding of ADS-B signals. Short runs of 3-5 feet / 1-2 meters can use RG-58 or other ‘poor’ cable. Runs of 10 feet / 3 meters or more require and low loss equivalent cable designed for high frequency.
Do not underestimate the loss from poor cable and connections.
*Before you start you will need your Location (Lat/Lon) to 5 decimal points and your Antenna Elevation, if you don’t know this already you can use THIS WEBSITE to get it. *Remember the website gives ground elevation so you will need to add your antenna’s height to that.
md5sum (zip): 34f14768c34b968c88f35a942b626665
md5sum (img): 4c316eb488961e97b923ee87a7fbe153
latest: 1.0.9 Mar 21th 2021
To find your latitude, longitude, and altitude for adsb-config.txt, go to https://www.mapcoordinates.net/en.
Be sure to add in the height above ground of the antenna install to the altitude.
To test your feeder is working correctly after setup go to https://www.adsbexchange.com/myip/ and look for 2 green smiles!
Links to the map and dashboard can be found by putting IP assigned to your Pi by your LAN network in a web browser.
Edit adsb-config.txt located on the sd card after burning image file.
Sample 1090 single SDR adsb-config.txt:
LATITUDE=34.495594 LONGITUDE=-41.782331 ALTITUDE=1050ft USER="buster_adsbx" DUMP1090=yes GAIN=49.6 DUMP978=no ZEROTIER=no
Edit the file with your information and altitude of antenna in MSL. Use notepad or basic text editor.
DO NOT USE MAGIC QUOTES.
DO NOT CHANGE FORMAT.
Be sure to change the USER to a unique name for your Pi.
Save adsb-config.txt to the sd card.
See next section for wireless setup.
ADSBx image uses default Raspbian setup for Wifi.
Once an image is created on an SD card, by inserting it into a card reader on a Linux or Windows machines the boot folder can be accessed. Adding certain files to this folder will activate certain setup features on the first boot of the Pi itself.
Before you power on the device you need to edit the wpa_supplicant.conf with your SSID and password located on the sd card.
After editing wpa_supplicant.conf, you can plug everything in and power the Pi.
At any time you can place a new wpa_supplicant.conf on /boot to update Wifi.
Raspbian Buster Lite guide can be found here.
SSH access is enabled and runs on port 22 or you may hook up a monitor and keyboard to log in locally..
Default user: pi Default password: adsb123
978 for US based 2 SDR receivers
You only need to do this if you have more than one SDR on the device.
Stop services that are using the SDRs:
sudo systemctl stop readsb sudo systemctl stop dump978-fa
Unplug the 1090 SDR and set the serial for the 978 SDR:
sudo rtl_eeprom -s 978
Unplug the 978 SDR and set the serial for the 1090 SDR:
sudo rtl_eeprom -s 1090
Unplug both SDRs, plug them back in again to make the system aware of the new serials, a reboot is not sufficient. Edit /boot/adsbx-env and remove the # for this line:
RECEIVER_OPTIONS="--device 1090 --device-type rtlsdr --ppm 0"
and add a # for this line:
#RECEIVER_OPTIONS="--device-type rtlsdr --ppm 0"
Edit /boot/adsb-config.txt and change DUMP978 to yes:
Grafana Dashboard Login
Display ADSBx config
Restart readsb service
sudo systemctl restart readsb
Show readsb status
sudo systemctl status readsb
Start Feeder Services
sudo systemctl start adsbexchange-mlat
sudo systemctl start adsbexchange-feed
Restart Feeder Service
sudo systemctl restart adsbexchange-feed
sudo systemctl restart adsbexchange-mlat
Show Feeder Service
sudo systemctl status adsbexchange-mlat
sudo systemctl status adsbexchange-feed
Technical Info (aka, stuff you probably don’t even need to know)
- All MLAT participants will receive a back-feed of any aircraft where their data was used in the calculations.
- A list of the software on the image can be seen HERE
NEED HELP? Join our Discord Chat.
That’s it, your traffic should now appear on the Global Radar Page.