===== Pi-Radio =====

Image: 2016-09-23-raspbian-jessie-lite.img

IP Address: 192.168.0.121\\
PW:st0lenm0ments

----
==== Upgrade ====

  $ sudo raspi-config

  $ sudo apt-get update
  $ sudo apt-get upgrade
  
  $ sudo apt-get install htop python-pip idle idle3

----
==== Mount USB Stick ====

  $ sudo mkdir /home/pi/stolenmoments
  $ sudo blkid
  /dev/sda1: LABEL="USB-STICK" UUID="3DE8-04D4" TYPE="vfat" PARTUUID="4ca531d6-01"
  $ sudo nano /etc/fstab
edit:
  #USB Stick on /dev/sda1
  UUID=3DE8-04D4     /home/pi/stolenmoments    vfat    utf8,umask=022,uid=pi,gid=pi  0       0
or:  
  #USB Stick on /dev/sda1
  /dev/sda1       /home/pi/stolenmoments    vfat    utf8,umask=022,uid=pi,gid=pi  0       0

$ sudo mount -a

----
==== IP and Network configuration ====

=== Enable the SSH Server ===
In Raspian Jessie it should be activated allready. If not enable the SSH server by opening the raspi-config:
  $ sudo raspi-config
In 8. Advanced Options you can activate SSH.

=== Static IP Address ===
Look up your gateway:
  $ netstat -r -n
Find you IP address:
  $ ip addr
Give the Raspberry Pi a static IP address. Open the interfaces file:
  $ sudo nano /etc/network/interfaces
Add these lines after "face eth0 inet dhcp":

Or:       
    # Ethernet
    auto eth0
    allow-hotplug eth0
    iface eth0 inet static
      address 192.168.0.121
      netmask 255.255.255.0
      gateway 192.168.0.1
      dns-nameservers 8.8.8.8 8.8.4.4
      
Save and quit, ctl+o, Return, ctl+x.\\

Disable the DHCP-Client:\\

   $ sudo service dhcpcd stop
   $ sudo systemctl disable dhcpcd       

Restart ethernet:\\
   $ sudo ifdown eth0
   $ sudo ifup eth0
  
Or/and reboot:
   $ sudo reboot
  
==== Login over SSH ====
One can login from your computer with:
  $ ssh pi@192.168.0.099
or with XWindows support:
  $ ssh -XY pi@192.168.0.099
PW: raspberry\\

=== Miscellaneous ===
If the host key verification failed, one can remove the old key with:\\
  $ ssh-keygen -R 192.168.0.099
And with\\
  ~.
one can terminate a broken ssh session.

----




==== Setting up the radio ====
**Pi-FM-RDS**\\
[[https://github.com/Ginkgo23/PiFmRPi2]]\\
  $ mkdir /home/pi/Pi-FM-RDS
  $ cd /home/pi/Pi-FM-RDS
  $ sudo apt-get install libsndfile1-dev
  $ wget https://github.com/Ginkgo23/PiFmRPi2/archive/master.zip
  $ unzip master.zip
  $ cd PiFmRPi2-master/src
  $ make clean
  $ make

  $ sudo ./pi_fm_rds -freq 99.9 -audio sound.wav
or:
  $ sudo /home/pi/Pi-FM-RDS/PiFmRPi2-master/src/pi_fm_rds -freq 99.9 -audio /home/pi/stolenmoments/radioouterspace_de.wav

----
==== Autostart ====

  $ sudo nano /etc/rc.local
insert before "exit 0":
  printf " "
  printf "*******************************************************\n"
  printf "*                                                     *\n"
  printf "*        (   (  ( ( (( o )) ) )  )   )                *\n"
  printf "*                      |                              *\n"
  printf "*                      |                              *\n"
  printf "*                      |                              *\n"
  printf "*                                                     *\n"
  printf "*             Radio From Outer Space                  *\n"
  printf "*                 dernulleffekt.de                    *\n"
  printf "*                 W.Spahn Okt 2016                    *\n"
  printf "*                                                     *\n"
  printf "*******************************************************\n"
  printf " "

  #start radio
  /home/pi/stolenmoments/radiofromouterspace_01.py &


----
==== Read-Only SD Card ====
Change the SD card to a read-only mode.\\
[[http://raspberrypi.stackexchange.com/questions/5112/running-on-read-only-sd-card]]\\
[[https://web.archive.org/web/20150101110424/http://raspberrycenter.de/forum/umruestung-raspberry-pi-read-only-root-filesystem]]\\

=== Fstab ===
in:
  $ sudo nano /etc/fstab
change:
  /dev/mmcblk0p2  /               ext4    defaults,noatime,ro  0       1
  tmpfs           /tmp            tmpfs   defaults,size=30M    0       0

=== Disable some Programms ===
disable rsyslog and dphys-swapfile:\\

  $ sudo systemctl disable rsyslog
  $ sudo systemctl disable dphys-swapfile

=== Remount ===
To remount the partition writabe:\\
  $ sudo mount / -o remount,rw

----
====GPIO Connections====
   GPIO 04   Antenna
   GPIO 17   Button EN
   GPIO 18   Button DE
   GPIO 22   LED DE
   GPIO 23   LED EN
   GPIO 27   Shutdown/Reset
   
[[http://elinux.org/RPi_Low-level_peripherals]]\\
<html>
<img src=http://elinux.org/images/5/5c/Pi-GPIO-header.png>
</html>

----
==== Other Radios ====

**PiFM**\\
[[https://github.com/rm-hull/pifm]]\\
[[http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter]]

  $ mkdir /home/pi/radio
  $ cd /home/pi/radio
download pifm:\\
  $ wget http://omattos.com/pifm.tar.gz
or:\\
  $ wget http://dernulleffekt.de/download/pifm.tar.gz
and unpack:\\
  $ tar -xzvf pifm.tar.gz
connect a wire to GPIO 4.\\
  $ sudo ./pifm left_right.wav freq 22050 stereo
  
**FM Transmitter**\\
for Pi 2,3 \\
make a folder:

  $ mkdir /home/pi/PiRadio
  $ cd /home/pi/PiRadio
install:

  $ sudo apt-get install unzip make gcc g++
download:\\  

  $ wget https://github.com/markondej/fm_transmitter/archive/master.zip
unzip:

  $ unzip master.zip
  $ cd fm_transmitter-master/
make:

  $ make
transmit:

  $ sudo ./fm_transmitter -f 99.9 star_wars.wav 

----