Broadcast workshop


#1

ljudmila-radio

Repo for Experimental Broadcasting workshop run at Ljudmila 3 Dec 2019

1/ Assemble materials

RPi
SD card
antenna (alligator clip w/wire)
Power
Ethernet cable

2/ Enable ETH sharing / network sharing

3/ Download + Install wireshark

4/ Download + Install Raspbian

wget https://weise7.org/~danja/rpi-broadcast.img.zip
unzip rpi-broadcast.img.zip
rm rpi-broadcast.img.zip
df -h
sudo umount /dev/sda1
sudo dd bs=1M if=/rpi-broadcast.img of=/dev/sda
sudo eject /dev/sda
touch /media/chootka/boot/ssh
sudo eject /dev/sda

5/ Log in to RPi + configure

ssh pi@ / raspberry
to force IP assignment - turn wired connection off/on then power cycle pi
sudo raspi-config (change password, expand file system)
sudo apt-get update
sudo apt-get install -y sox git libsox-fmt-mp3

6/ git clone https://github.com/markondej/fm_transmitter.git

cd fm_transmitter
make
sudo ./fm_transmitter -f 102.9 acoustic_guitar_duet.wav

7/ get scripts and conf files

cd
git clone https://github.com/chootka/ljudmila-radio.git
cd ljudmila-radio
mv PiStation.py …/fm_transmitter

8/ Play MP3s or play through a directory w/wav or mp3

cd music
unzip fizzarum.zip
rm fizzarum.zip
mv * ~/upload
cd ~/fm_transmitter
mv *.wav …/upload
sudo python ./PiStation.py -f 102.9 …/upload/fizzarum/03-vesat.mp3
sudo python ./PiStation.py -f 102.9 …/upload/

9/ Broadcast from audio input via external USB microphone or sound card

Via USB headphones w/mic or line in

arecord -l (list audio devices registered w/system)

broadcast from usb microphone or soundcard input (maybe from your phone, other audio source w/3.5mm output)

sudo python ./PiStation.py -f 102.9 line

9/ Set up web interface

sudo apt install lighttpd php7.3-fpm php7.3-mbstring php7.3-mysql php7.3-curl php7.3-gd php7.3-curl php7.3-zip php7.3-xml
sudo lighttpd-enable-mod fastcgi-php
cd ~/ljudmila-radio
sudo cp -vf conf/15-fastcgi-php.conf /etc/lighttpd/conf-enabled/
sudo cp -vf conf/php.ini /etc/php/7.3/fpm/
sudo service lighttpd force-reload
install simple web UI for uploading
sudo cp -vf web/* /var/www/html

10/ Set up access point and dnsmasq for captive portal

sudo apt-get install -y hostapd dnsmasq
nano conf/interfaces
change wlan0 static address to something unique, 192.168.9x.1
sudo cp -vf conf/interfaces /etc/network/
nano conf/hostapd.conf
set new wireless access point name + change channel
sudo cp -vf conf/hostapd.conf /etc/hostapd/
nano conf/dnsmasq.conf
change address to address=/#/
change dhcp address range to match of device
sudo cp -vf conf/dnsmasq.conf /etc/
sudo systemctl unmask hostapd
sudo reboot