==== APRS iGate ====

  * Raspberry Pi Zero
  * NooElec NESDR Nano 2+ Tiny RTL-SDR

----

==== Setup ====

  * Burn the latest Raspbian Lite image to an SD card & boot up the Pi
  * Login using "pi" with password "raspberry"

   > sudo raspi-config
      Expand filesystem
      Set locale                        "en_US,UTF-8 UTF-8"
      Set timezone                      "US, Central"
      Set keyboard layout               "Generic 101-key PC, English (US)"
      Set Wi-Fi country                 "US United States"
      Enable SSH

==== Patches ====
   > sudo apt-get update
   > sudo apt-get upgrade

==== Change default pi password ("raspberry")  & set the root password ====
   > passwd
   > sudo passwd root
   > sudo nano /etc/ssh/sshd_config
      change "PermitRootLogin without-password" to "PermitRootLogin yes"

==== firewalld ====
   > sudo apt-get install firewalld

==== gpsd ====
   > sudo apt-get install gpsd gpsd-clients python-gps libgps-dev
   > sudo nano /lib/systemd/system/gpsd.socket
      change "ListenStream=127.0.0.1:2947" to "ListenStream=0.0.0.0:2947"
   > sudo nano /etc/default/gpsd
      START_DAEMON="true"
      USBAUTO="false"
      DEVICES="/dev/ttyUSB0"
      GPSD_OPTIONS="-n"
      GPSD_SOCET="/var/run/gpsd.sock"
   > sudo /etc/init.d/gpsd restart
   > cgps -s

=== Create firewall service for gpsd ===
   > sudo nano /etc/firewalld/services/gpsd.xml
      <?xml version="1.0" encoding="utf-8"?>
      <service>  
         <short>gpds</short>  
         <description>gpsd</description>  
         <port protocol="tcp" port="2947"/>  
      </service>
   > sudo chmod 640 /etc/firewalld/services/gpsd.xml 
   > sudo firewall-cmd --permanent --add-service=gpsd

==== rtl-sdr ====
   > sudo apt-get install -y  cmake pkg-config libusb-1.0
   > sudo apt-get install git
   > git clone git://git.osmocom.org/rtl-sdr.git
   > cd rtl-sdr/
   > mkdir build
   > cd build
   > cmake ../ -DINSTALL_UDEV_RULES=ON
   > make
   > sudo make install
   > sudo ldconfig

=== Edit /etc/modprobe.d/raspi-blacklist.conf ===
     blacklist dvb_usb_rtl28xxu
     blacklist rtl2832
     blacklist rtl2830

=== Create firewall service for rtl_tcp ===
   > sudo nano /etc/firewalld/services/rtl_tcp.xml
      <?xml version="1.0" encoding="utf-8"?>
      <service>  
         <short>rtl_tcp</short>  
         <description>rtl_tcp</description>  
         <port protocol="tcp" port="1234"/>  
         <port protocol="udp" port="7355"/>  
     </service>
   > sudo chmod 640 /etc/firewalld/services/rtl_tcp.xml 
   > sudo firewall-cmd --permanent --add-service=rtl_tcp

==== Direwolf ====
   > sudo apt install git gcc g++ make cmake libasound2-dev libudev-dev gpsd libgps-dev
   > cd ~
   > git clone https://www.github.com/wb2osz/direwolf
   > cd direwolf
   > git checkout dev
   > mkdir build && cd build
   > cmake ..
   > make -j4
   > sudo make install
   > make install-conf
   > cd ~
   > sudo nano direwolf.conf (Place your settings here)
   > sudo rtl_fm -f 144.39M - | direwolf -c direwolf.conf -r 24000 -D 1 -
   
=== Create firewall service for Direwolf ===
   > sudo nano /etc/firewalld/services/direwolf.xml
      <?xml version="1.0" encoding="utf-8"?>
      <service>  
         <short>Direwolf</short>  
         <description>Direwolf</description>  
         <port protocol="tcp" port="8000"/>  
         <port protocol="tcp" port="8001"/>  
      </service>
   > sudo chmod 640 /etc/firewalld/services/direwolf.xml 
   > sudo firewall-cmd --permanent --add-service=direwolf

=== Make it a service ===
[[https://www.f4fxl.org/start-direwolf-at-boot-the-systemd-way/|Source: F4FXL]]
   > sudo apt install netcat
   > sudo apt install tmux
   > sudo nano /etc/systemd/system/direwolf.service
      [Unit]
      Description=Direwolf
      After=network.target
      [Service]
      Type=forking
      ExecStart=/usr/bin/tmux new-session -d -s direwolf '/usr/local/bin/rtl_fm -f 144.39M - | 
     /usr/local/bin/direwolf -c /home/w5ged/direwolf.conf -t 0 -r 24000 -D 1 -'
      Restart=always
      [Install]
      WantedBy=default.target
   > sudo systemctl enable direwolf.service
   > sudo systemctl start direwolf.service
   > sudo tmux attach -t direwolf (To view the output from Direwolf)