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# optaradio

software and other stuff for my personal internet radio side project

WORK IN PROGRESS

what have i done:

My father tidied up his basement and found a Loewe Opta R115 radio. It worked but had an annoying noise in the background and along with the fact that UKW (FM), "Ultrakurzwelle" will be turned off in the future, I decided to rip out all of the stuff and turn it into an internet radio.
It took quite a while. But now I reached a step in which the software and hardware is usable!

I try to document everything, so if you want to recreate this (aka. wake up the dragon): Good luck 🍀
This is no step to step instruction, so you should take your time and think yourself.

hardware i used 🕹

  • Raspberry Pi 3 Model B V1.2
  • 1024x600px Display with HDMI
  • cheap USB Soundcard (3.5 plug on RPI is crap)
  • Amplifier with TPA3116D2 (have to check it out first, if it works fine)
  • Monacor SP-13/4 speaker
  • MeanWell RS-75-12 power supply (hope it delivers enough power for everything)

how i use/make/run that:

You can run the radio software as standalone on your desktop, buts that a bit stupid, because there are way better tools to play internet radio on your pc.

prepare 🥧

[all commands in your user space: /home/pi unless its explicit declared]

  1. flash Raspbian Lite on a micro sd card
  2. touch ssh in the root dir on the micro sd card
  3. connect via ssh and run raspi-config
    • System Options > Wireless LAN
    • System Options > Password
    • System Options > Boot / Auto Login > Console Autologin
  4. remove boring booting stuff (optional)
    • add disable_splash=1 at the end of /boot/config.txt and save
    • add logo.nologo quiet and change console=tty1 to console=tty3 in /boot/cmdline.txt and save
  5. install everything needed
    • apt update
    • apt upgrade
    • apt install --no-install-recommends xserver-xorg x11-xserver-utils xinit
      (i know, i could use framebuffer with pygame, but I want to grab the pygame window over ssh and therefore I need xserver)
    • apt install git python3-pip vlc imagemagick pulseaudio libsdl-ttf2.0-0 python3-rpi.gpio
  6. dpkg-reconfigure tzdata and set your correct location for time
  7. git clone https://github.com/p4cx/optaradio.git in your user directory /home/pi
  8. run pip3 -r install requirements.txt in the freshly cloned optaradio repo
  9. grab an api url from openweathermap and paste it into nano weater.cfg - it should look like this: http://api.openweathermap.org/data/2.5/weather?q=munich&units=metric&appid=1234567890abcdefghijklmnopqrstuv
    Attention: get sure, that units is metric: "units=metric".
  10. ./optaradio/build.sh to get fonts and emojis from external repositorys

-- have to test this

  1. create a crontab for autostart
    • sudo crontab -e
    • insert @reboot sh /home/pi/optaradio/radio_startup.sh >/home/pi/optaradio/logs/cronlog 2>&1
  2. test it and if it runs: be happy

developing 💻

  • activate X11 fowarding on your host machine (sshd config)
    ssh [email protected] -Y on your machine and you will get the pygame window on your desktop
  • how do get radiothumbnails on the pi? Copy it manually with filezilla!

gpio usage 💡

USAGE PIN PIN USAGE
Power for all buttons 3V3 5V --
Favourite button 1 2 5V Power for rotary encoder
Favourite button 2 3 GND Ground for rotary encoder
Favourite button 3 4 14 Rotary encoder button
-- GND 15 Data channel rotary encoder
Favourite button 4 17 18 Clock rotary encoder
Favourite button 5 27 GND Ground for relais
Favourite button 6 22 23 Channel 1 for relais
-- 3V3 24 Channel 2 for relais
-- 10 GND --
Favourite button 7 9 25 Setting button 1
-- 11 8 Setting button 2
-- GND 7 Setting button 3
Update button 0 1 Setting button 4
-- 5 GND --
-- 6 12 --
-- 13 GND --
-- 19 16 --
-- 26 20 --
-- GND 21 --

run the 🐍 radio software

  1. cd ./optaradio
  2. python3 ./init.py

control optaradio

basic idea of controlling the radio: Like iDrive from BMW, rotate the wheel (in my case the KY-040 rotary encoder) to go up and down und press it to activate menu entry.

control on desktop:

  • return: input
  • up: up
  • down: down
  • 1-7: Favourite buttons
  • q: go back
  • w: audio on/off
  • e: LED on/off (future project)
  • r: settings
  • ESC: exit

control with real buttons:

  • look at gpio usage, it should be self explaining

build 📻

  1. get an old radio
  2. get rid of all old crap inside
  3. put a nice lcd and other fancy electronic stuff inside
  4. jump in 🌙 light around the radio
  5. squeeze your Raspberry Pi in the housing
  6. turn it on and have fun