JavaFx-Carpc

Carpc wirtten in JavaFx,

Language

Java (open-jdk 8, openjfx)

Features

• Plays Musik via Mpd
• Shows Navigation via Navit
• Plays DAB+ Radio via Welle.io
• Uploads GPS Tracks via http(s)
• Updates Musik via owncloudcmd

Dependencies

• java-mpd
• json-simple

Hardware

• Raspberrypi 3 or 4, (maby 2 never tested)
• Raspberrypi 7-Inch Touch Screen Display
• StromPi for 12V power Supply (or whaterver you whant to use)
• RTL2832 USB dongle (or whatever welle.io and your county supports)
• GPS USB dongle (or whatever gpsd supports)

How to use

TODO

Setup

JavaFx-Carpc

Clone and repository and build project replace or define $PATH_TO_FX with your installation path of javafx

git clone https://github.com/tost11/JavaFx-Carpc.git
cd JavaFx-Carpc/
git submodule update --init --recursive
mkdir build
javac --module-path $PATH_TO_FX --add-modules javafx.controls -d build -sourcepath 'src/main/java/:json-simple/src/main/java/:java-mpd/src/main/java/' src/main/java/de/tostsoft/carpc/PlayerMain.java
cd build
echo "Main-Class: de.tostsoft.carpc.PlayerMain" > manifest.txt
echo "Class-Path: ." >> manifest.txt
jar -cvfm Player.jar manifest.txt

After that switch int to build folder and Start the Application.

java -jar --module-path $PATH_TO_FX --add-modules javafx.controls build/Player.jar

Whenn connected via ssh you need to export display via 'export DISPLAY=:0'

MPD

MPD is a musik Player that can be controllerd by a text interface over Network. So it is possible to control the musik played on your Car-Radio by Handy, PC, or whatever device you are using. The recomended MPD version is 0.21.*. On previous versions download of album covers via text interface will not work and it will not be shown in the Player.

Setup on Raspian Buster

Just install mpd from you packet manager an you're fine

Setup on Raspian Stretch

First of all you don't want to do that !!! Are you still here ? Mhm ok... Do you realy need the album covers? if not install last version from packet manager and be happy. If not you have to compile mpd yourself and that means you need an newer version of: gcc, cmake, boost, pyhton, meson, ninja. For that have a look at the Scripts in the [setup_data/scripts/raspian_stretch] folder. That will keep your pi busy for a howl day. For faster compiling you cann disable pyhton tests. Also you have to increase the virtual RAM of the rpy for compiling gcc. I changed it one 1GB and it worked fine.

Configuration

For starting mpd with the pi user you have to crate an .mpd folder in /home/pi and copy the default config file from /etc/mpd.conf. After that you change or may not change these Paramters.

• music_directory "home/pi/owncloud"
• playlist_directory "/home/pi/owncloud/Playlists-Musikbot"
• user "pi"
• bind_to_address "0.0.0.0"
• db_file "/home/pi/mpd/tag_cache"
• log_file "/home/pi/.mpd/mpd.log"
• pid_file "/home/pi/.mpd/pid"
• state_file "/home/pi/.mpd/state"

Also i prefer changing audio output to pulse instead of alsa

Feature Owncloud

With this feature you cann download music data from a your own server. There fore you have to define the url and the destination folder in the config file as discribed beneth. Also you have to install the owncloud-cmd and define user and password in a .netrc described here. Also you have to define an empty exlude list file.

sudo apt-get install -y owncloud-client-cmd
sudo mkdir /etc/owncloud-client
sudo touch /etc/owncloud-client/sync-exclude.lst

Feature Gps-Logging/Upload

To use gpsd and Log all informatin to json files the libraries gpsd and gpsd-clients are needet so install them

sudo apt-get install -y gpsd gpsd-clients

With gpsd-clients comes a comandline tool named: gpspipe that will log all outcoming trafic from gpsd to a specified json file. For use of that i crated a script that stores these output in a specified folder with the current time. Have a look here. At least make that script executable and add it to your crontab entry to start on boot

@reboot /bin/bash PATH_TO_SCRIPT PATH_TO_LOG_FOLDER

Set the config variable gps_dir int the application configuration to match the same folder

Feature Navit

For navigation is the Software Navit used. You cann install it via package manager or build it yourself. On my rpy3, I needet to to build it manually for Raspian Stretch for some reason (check scritps folder for that). Navit loads all important information from navit.xml. You can check out mine here. Most of it comes from this side Its also a very good tutorial how to get navit running.

If navit sometimes freezes for no reason you have to increase the gpu RAM fo the Raspberry-Pi. Therefor open /boot/config.txt and change gpu_mem e.g. gpu_mem=128.

When using my navit.xml you cann install it via:

sudo apt-get -y install navit mpc
cp JavaFx-Carpc/setup_data/navit/navit.xml ~/.navit/
cp JavaFx-Carpc/setup_data/scripts/change_bright.sh ~/.navit/
chmod u+x ~/.navit/change_bright.sh
sudo cp JavaFx-Carpc/setup_data/navit/icons/* /usr/share/navit/icons/
sudo mkdir /usr/share/navit/maps/
sudo wget -O /usr/share/navit/maps/map.bin http://maps9.navit-project.org/api/map/?bbox=-17.6,34.5,42.9,70.9

This will create local .navit folder in your houme directory where all data ist stored. Also it installs mpc for the mpd controll buttons in navit UI. And it will download a map containg Westeurope.

Feature DAB+ via Welli-IO

For using the DAB+ Feature you have to compile welle-io yourself and add start script to boot process. Also you have to enable feature via config paramters.

sudo apt-get install -y cmake libmp3lame-dev libmpg123-dev libfftw3-dev libfaad-dev librtlsdr-dev
git clone https://github.com/AlbrechtL/welle.io.git
cd welle.io/
mkdir build
cd build
cmake .. -DRTLSDR=1 -DBUILD_WELLE_IO=OFF -DBUILD_WELLE_CLI=ON
make -j4
sudo make install
#copy 'welle-cli -c 5C -C 1 -w 7979 &' to rc.local
#enable in carpc config.properties 'enable_radio=true'

Depending on your country you have to replace the -c paramter '5C' with the one for your location

Autostart via X-Server

Start

For starting of the raspberrypi i wired a switch to the start GPIO pins of the pi. So it gets started when i connect those.

Shutdown

To shutdown the raspberrypi this skript cann be used. It checks two GPIO pins. The first one is the same used on start, the other one is a pin enabled by a jumper. So only if the jumper pin is set to on and the swritch is turned of the raspberrypi is shut down.

The second pin with the jumper is for debugging purpose, because a system shutting down if the power switch is not connected is quit annoying.

Also the shutdown script enables the wlan befor shuting down and runns the java application with cmd flag, so the owncloud and gps data could be updated. The purpose for that is, performing an updating when parking your car before your home and automaticly doing an update.

To use the sctript add ist to the /etc/initrc or to cron root user entries. Root rights are required because shutdown needts that.

Old XServer rapian-jessy setup

You don't what to use that //TODO find out how i have done that

Configuration

There is a config file for dis/enableing Features and set up needet Folders and Files

Comandline Paramters

• update -> just updates what is possible (gps,owncloud,mpd) witout showing gui
• debug -> sets log level to debug
• config=file -> changes used config file

Config File Paramters

• ip (string) -> Default mpd IP (hostname or ip)
• ip_1 (string) -> Frist possible mpd ip for dropdown in settings
• ip_2 (string)-> Second possible mpd ip for dropdown in settings
• ip_* (string)-> You get it right ? Change number for next ip, max is 100
• width (int) -> width of window (not optimized for other resolution)
• height (int) -> height of window (not iptimized for other resolution)
• lighting_file (string) -> file on rpy where brightniss is saved
• lighting_min_value (int) -> minimal possible selectable brightness
• lighting_step_value (int) -> value of increasing brightness on one klick
• wlan_file (string)-> file on rpy where wlan status is stored
• wlan_interface (string) -> used wlan interface
• enable_owncloud (boolean)-> enables owncloud feature
• owncloud_host (string) -> url to owncloud bzw nextcloud server
• owncloud_dir (string) -> folder where data will sync
• enable_gps (string) -> enables gps upload feature
• gps_dir (string) -> folder where pgs data is loged
• gps_upload_url (string) -> url where gps data will be uploaded
• gps_upload_keystore (string) -> keystore with with private key
• gps_upload_keystore_pw (string) -> first password for keystore
• gps_upload_keystore_pw_2 (string) -> second password for keystore
• enable_radio (boolean) -> enables radio feature

Images