ADS-B and LiveATC feeder

Setup for feeding data from my Raspberry Pi to:

Flightradar24 (ADS-B)
FlightAware (ADS-B)
LiveATC (audio)

Hardware:

Raspberry Pi 4 Debian Bullseye, arm64
Mode-S Beast MkII (USB ADS-B receiver)
CM108 USB sound card with bias voltage removed from mic input (see how to)
Scanner radio

The Raspberry Pi will be configured to start each feeding service automatically after it boots.

ADS-B feeding setup

Install Beast Splitter

This tool redistributes the data stream coming from the Mode-S Beast so multiple software can read from it.

$ dpkg-buildpackage -b
$ sudo dpkg -i ../beast-splitter_8.2_arm64.deb

Install FlightAware feeder

sudo bash -c "$(wget -O - https://raw.githubusercontent.com/abcd567a/piaware-ubuntu-debian-amd64/master/install-piaware.sh)"

Configure:

sudo piaware-config feeder-id xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx 
sudo piaware-config allow-manual-updates yes 
sudo piaware-config allow-auto-updates yes 
sudo systemctl restart piaware

It should automatically detect the data stream from Beast Splitter. The FlightAware feed should now be up and running.

Install Flightradar24 feeder

$ sudo bash -c "$(wget -O - http://repo.feed.flightradar24.com/install_fr24_rpi.sh)"

Important setup steps

Step 1.3 - Would you like to participate in MLAT calculations? (yes/no)$:no
...
Would you like to use autoconfig (*yes*/no)$:no
...
Step 4.1 - Receiver selection:

 1 - DVBT Stick (USB)
 -----------------------------------------------------
 2 - SBS1/SBS1er (USB/Network)
 3 - SBS3 (USB/Network)
 4 - ModeS Beast (USB/Network)
 5 - AVR Compatible (DVBT over network, etc)
 6 - microADSB (USB/Network)

Enter your receiver type (1-7)$:4
...
Step 4.2 - Please select connection type:

 1 - Network connection
 2 - USB directly to this computer

Enter your connection type (1-2)$:1
...
Step 4.3A - Please enter your receiver's IP address/hostname
$:localhost 

Step 4.3B - Please enter your receiver's data port number
$:30005

The FlightRadar24 feed should now be up and running.

Install opensky feeder

wget https://opensky-network.org/files/firmware/opensky-feeder_latest_armhf.deb
sudo dpkg -i opensky-feeder_latest_armhf.deb

See https://opensky-network.org/community/projects/30-dump1090-feeder

LiveATC feed setup

Install Darkice. This software is used for streaming audio to Icecast servers.

$ sudo apt-get install libmp3lame0 libtwolame0
$ sudo apt-get install -y darkice

Create the file /etc/darkice.cfg (this is the file darkice reads by default)

[general]
duration        = 0
bufferSecs      = 5
reconnect       = yes

[input]
device          = plughw:1,0     # sound device
sampleRate      = 44100          # 22050 or 44100
bitsPerSample   = 16             # only use 16
channel         = 1              # use mono

[icecast2-0]
bitrateMode     = cbr
format          = mp3
bitrate         = 16             
server          = audio-in.liveatc.net
port            = 8010
sampleRate      = 22050
lowpass         = 3500
mountPoint      = ASSIGNED-BY-LIVEATC
password        = ASSIGNED-BY-LIVEATC
name            = FEED-DESCRIPTION
description     = FEED-DESCRIPTION
url             = http://www.liveatc.net
genre           = ATC
public          = no

Create /lib/systemd/system/darkice.service:

[Unit]
Description=DarkIce live audio streamer

[Service]
Restart=always
RestartSec=3
ExecStart=darkice
ExecStop=/usr/bin/pkill darkice

CPUSchedulingPolicy=fifo
CPUSchedulingPriority=4

[Install]
WantedBy=multi-user.target

Then activate the new service

$ sudo systemctl daemon-reload
$ sudo systemctl enable darkice
$ sudo systemctl start darkice

Darkice should now be streaming to LiveATC. Use alsamixer to adjust the volume:

$ alsamixer -c 1

To ensure the audio device ID is the same every time the PI boots

List the available audio devices using cat /proc/asound/modules. This should give an output similar to this:

 0 snd_bcm2835
 1 snd_usb_audio
 2 vc4
 3 vc4

Create the file /etc/modprobe.d/alsa-base.conf and specify which index each audio device should get. Since the Darkice config specifies device = plughw:1,0 the USB sound card should have index 1. Setting vc4 index=-2 ensures that the micro-HDMI outputs are never used as default audio device. More info here.

options snd_bcm2835 index=0
options snd_usb_audio index=1
options vc4 index=-2

7h3rAm/adsb-and-liveatc-feed.md