Wifi Robot – 4

July 15, 2013 § Leave a comment

This is the second and final version of wifi-speaker.

After following the instructions of Wifi Robot – 3, you can follow the instructions on this page cause some of the software package installed in my previous post is needed here.

Install mpd(music player daemon),  mpc(music player daemon console)  alsa is a sound card driver.

opkg update
opkg install mpd mpc alsa-lib alsa-utils libsndfile

Then with winscp go to /etc/mpd.conf and make the file look exactly like following. If you have different hardware then search google for that.

# An example configuration file for MPD
# See the mpd.conf man page for a more detailed description of each parameter.
# Files and directories #######################################################
#
# This setting controls the top directory which MPD will search to discover the
# available audio files and add them to the daemon's online database. This
# setting defaults to the XDG directory, otherwise the music directory will be
# be disabled and audio files will only be accepted over ipc socket (using
# file:// protocol) or streaming files over an accepted protocol.
#
music_directory "/home/music"
#
# This setting sets the MPD internal playlist directory. The purpose of this
# directory is storage for playlists created by MPD. The server will use
# playlist files not created by the server but only if they are in the MPD
# format. This setting defaults to playlist saving being disabled.
#
#playlist_directory "~/.mpd/playlists"
#
# This setting sets the location of the MPD database. This file is used to
# load the database at server start up and store the database while the
# server is not up. This setting defaults to disabled which will allow
# MPD to accept files over ipc socket (using file:// protocol) or streaming
# files over an accepted protocol.
#
db_file "/home/music/system/mpd.db"
#
# These settings are the locations for the daemon log files for the daemon.
# These logs are great for troubleshooting, depending on your log_level
# settings.
#
# The special value "syslog" makes MPD use the local syslog daemon. This
# setting defaults to logging to syslog, otherwise logging is disabled.
#
log_file "/home/music/system/mpd.log"
#
# This setting sets the location of the file which stores the process ID
# for use of mpd --kill and some init scripts. This setting is disabled by
# default and the pid file will not be stored.
#
#pid_file "~/.mpd/pid"
#
# This setting sets the location of the file which contains information about
# most variables to get MPD back into the same general shape it was in before
# it was brought down. This setting is disabled by default and the server
# state will be reset on server start up.
#
#state_file "~/.mpd/state"
#
# The location of the sticker database. This is a database which
# manages dynamic information attached to songs.
#
#sticker_file "~/.mpd/sticker.sql"
#
###############################################################################
# General music daemon options ################################################
#
# This setting specifies the user that MPD will run as. MPD should never run as
# root and you may use this setting to make MPD change its user ID after
# initialization. This setting is disabled by default and MPD is run as the
# current user.
#
#user "nobody"
#
# This setting specifies the group that MPD will run as. If not specified
# primary group of user specified with "user" setting will be used (if set).
# This is useful if MPD needs to be a member of group such as "audio" to
# have permission to use sound card.
#
#group "nogroup"
#
# This setting sets the address for the daemon to listen on. Careful attention
# should be paid if this is assigned to anything other then the default, any.
# This setting can deny access to control of the daemon.
#
# For network
#bind_to_address "any"
#
# And for Unix Socket
#bind_to_address "~/.mpd/socket"
#
# This setting is the TCP port that is desired for the daemon to get assigned
# to.
#
port "6600"
#
# This setting controls the type of information which is logged. Available
# setting arguments are "default", "secure" or "verbose". The "verbose" setting
# argument is recommended for troubleshooting, though can quickly stretch
# available resources on limited hardware storage.
#
#log_level "default"
#
# If you have a problem with your MP3s ending abruptly it is recommended that
# you set this argument to "no" to attempt to fix the problem. If this solves
# the problem, it is highly recommended to fix the MP3 files with vbrfix
# (available from <http://www.willwap.co.uk/Programs/vbrfix.php>), at which
# point gapless MP3 playback can be enabled.
#
#gapless_mp3_playback "yes"
#
# This setting enables MPD to create playlists in a format usable by other
# music players.
#
#save_absolute_paths_in_playlists "no"
#
# This setting defines a list of tag types that will be extracted during the
# audio file discovery process. Optionally, 'comment' can be added to this
# list.
#
#metadata_to_use "artist,album,title,track,name,genre,date,composer,performer,disc"
#
# This setting enables automatic update of MPD's database when files in
# music_directory are changed.
#
#auto_update "yes"
#
# Limit the depth of the directories being watched, 0 means only watch
# the music directory itself. There is no limit by default.
#
#auto_update_depth "3"
#
###############################################################################
# Symbolic link behavior ######################################################
#
# If this setting is set to "yes", MPD will discover audio files by following
# symbolic links outside of the configured music_directory.
#
#follow_outside_symlinks "yes"
#
# If this setting is set to "yes", MPD will discover audio files by following
# symbolic links inside of the configured music_directory.
#
#follow_inside_symlinks "yes"
#
###############################################################################
# Zeroconf / Avahi Service Discovery ##########################################
#
# If this setting is set to "yes", service information will be published with
# Zeroconf / Avahi.
#
#zeroconf_enabled "yes"
#
# The argument to this setting will be the Zeroconf / Avahi unique name for
# this MPD server on the network.
#
#zeroconf_name "Music Player"
#
###############################################################################
# Permissions #################################################################
#
# If this setting is set, MPD will require password authorization. The password
# can setting can be specified multiple times for different password profiles.
#
#password "password@read,add,control,admin"
#
# This setting specifies the permissions a user has who has not yet logged in.
#
#default_permissions "read,add,control,admin"
#
###############################################################################
# Input #######################################################################
#

input {
 plugin "curl"
# proxy "proxy.isp.com:8080"
# proxy_user "user"
# proxy_password "password"
}

#
###############################################################################

# Audio Output ################################################################
#
# MPD supports various audio output types, as well as playing through multiple
# audio outputs at the same time, through multiple audio_output settings
# blocks. Setting this block is optional, though the server will only attempt
# autodetection for one sound card.
#
# See <http://mpd.wikia.com/wiki/Configuration#Audio_Outputs> for examples of
# other audio outputs.
#
# An example of an ALSA output:
#
#audio_output {
# type "alsa"
# name "My ALSA Device"
## device "hw:0,0" # optional
## format "44100:16:2" # optional
## mixer_type "hardware" # optional
## mixer_device "default" # optional
## mixer_control "PCM" # optional
## mixer_index "0" # optional
#}
#
# An example of an OSS output:
#
#audio_output {
# type "oss"
# name "My OSS Device"
# device "/dev/snd/controlC0" # optional
# format "44100:16:2" # optional
# mixer_type "software" # optional
## mixer_device "/dev/mixer" # optional
## mixer_control "PCM" # optional
#}
audio_output {
 type "alsa"
 name "Generic USB Audio Device"
 device "hw:0,0" # optional
 format "44100:16:2" # optional
 mixer_type "software"
 mixer_device "default"
 mixer_control "PCM"
}
#audio_output {
# type "oss"
# name "My OSS Device"
# device "/dev/snd/"
# format "44100:16:2"
#}
#
# An example of a shout output (for streaming to Icecast):
#
#audio_output {
# type "shout"
# encoding "ogg" # optional
# name "My Shout Stream"
# host "localhost"
# port "8000"
# mount "/mpd.ogg"
# password "hackme"
# quality "5.0"
# bitrate "128"
# format "44100:16:1"
## protocol "icecast2" # optional
## user "source" # optional
## description "My Stream Description" # optional
## genre "jazz" # optional
## public "no" # optional
## timeout "2" # optional
## mixer_type "software" # optional
#}
#
# An example of a recorder output:
#
#audio_output {
# type "recorder"
# name "My recorder"
# encoder "vorbis" # optional, vorbis or lame
# path "/var/lib/mpd/recorder/mpd.ogg"
## quality "5.0" # do not define if bitrate is defined
# bitrate "128" # do not define if quality is defined
# format "44100:16:1"
#}
#
# An example of a httpd output (built-in HTTP streaming server):
#
#audio_output {
# type "httpd"
# name "My HTTP Stream"
# encoder "vorbis" # optional, vorbis or lame
# port "8000"
# bind_to_address "0.0.0.0" # optional, IPv4 or IPv6
## quality "5.0" # do not define if bitrate is defined
# bitrate "128" # do not define if quality is defined
# format "44100:16:1"
# max_clients "0" # optional 0=no limit
#}
#
# An example of a pulseaudio output (streaming to a remote pulseaudio server)
#
#audio_output {
# type "pulse"
# name "My Pulse Output"
## server "remote_server" # optional
## sink "remote_server_sink" # optional
#}
#
## Example "pipe" output:
#
#audio_output {
# type "pipe"
# name "my pipe"
# command "aplay -f cd 2>/dev/null"
## Or if you're want to use AudioCompress
# command "AudioCompress -m | aplay -f cd 2>/dev/null"
## Or to send raw PCM stream through PCM:
# command "nc example.org 8765"
# format "44100:16:2"
#}
#
## An example of a null output (for no audio output):
#
#audio_output {
# type "null"
# name "My Null Output"
# mixer_type "none" # optional
#}
#
# This setting will change all decoded audio to be converted to the specified
# format before being passed to the audio outputs. By default, this setting is
# disabled.
#
#audio_output_format "44100:16:2"
#
# If MPD has been compiled with libsamplerate support, this setting specifies
# the sample rate converter to use. Possible values can be found in the
# mpd.conf man page or the libsamplerate documentation. By default, this is
# setting is disabled.
#
#samplerate_converter "Fastest Sinc Interpolator"
#
###############################################################################
# Normalization automatic volume adjustments ##################################
#
# This setting specifies the type of ReplayGain to use. This setting can have
# the argument "off", "album" or "track". See <http://www.replaygain.org>
# for more details. This setting is off by default.
#
#replaygain "album"
#
# This setting sets the pre-amp used for files that have ReplayGain tags. By
# default this setting is disabled.
#
#replaygain_preamp "0"
#
# This setting enables on-the-fly normalization volume adjustment. This will
# result in the volume of all playing audio to be adjusted so the output has
# equal "loudness". This setting is disabled by default.
#
#volume_normalization "no"
#
###############################################################################
# MPD Internal Buffering ######################################################
#
# This setting adjusts the size of internal decoded audio buffering. Changing
# this may have undesired effects. Don't change this if you don't know what you
# are doing.
#
#audio_buffer_size "2048"
#
# This setting controls the percentage of the buffer which is filled before
# beginning to play. Increasing this reduces the chance of audio file skipping,
# at the cost of increased time prior to audio playback.
#
#buffer_before_play "10%"
#
###############################################################################
# Resource Limitations ########################################################
#
# These settings are various limitations to prevent MPD from using too many
# resources. Generally, these settings should be minimized to prevent security
# risks, depending on the operating resources.
#
#connection_timeout "60"
#max_connections "10"
#max_playlist_length "16384"
#max_command_list_size "2048"
#max_output_buffer_size "8192"
#
###############################################################################
# Character Encoding ##########################################################
#
# If file or directory names do not display correctly for your locale then you
# may need to modify this setting.
#
#filesystem_charset "UTF-8"
#
# This setting controls the encoding that ID3v1 tags should be converted from.
#
#id3v1_encoding "ISO-8859-1"
#
###############################################################################
# SIDPlay decoder #############################################################
#
# songlength_database:
# Location of your songlengths file, as distributed with the HVSC.
# The sidplay plugin checks this for matching MD5 fingerprints.
# See http://www.c64.org/HVSC/DOCUMENTS/Songlengths.faq
#
# default_songlength:
# This is the default playing time in seconds for songs not in the
# songlength database, or in case you're not using a database.
# A value of 0 means play indefinitely.
#
# filter:
# Turns the SID filter emulation on or off.
#
#decoder {
# plugin "sidplay"
# songlength_database "/media/C64Music/DOCUMENTS/Songlengths.txt"
# default_songlength "120"
# filter "true"
#}
#
###############################################################################

Then you need to make the following folders in root of your router via winscp. make the following files also.

Make a folder named home in root. Inside home folder make a folder named music. Inside music folder, make a folder named system. Inside system create two blank file named mpd.db and mpd.log . And set properties of each folder to read+writeable from their properties. You can also load some music into /home/music with winscp(slower) or attaching the pendrive to a linux PC(ultra faster).

blg3

Then install Auremo (it is a good looking mpd controller software) from here. You need Microsoft .net framework 4.0 to run auremo, google for it and install it. i haven’t provided link for that coz microsoft’s download location may change.

Restart router, after router rebooted, run auremo from the desktop and ssh to your router, and type the following comands –

mpd
mpc

Then configure auremo like the following image says –
blg3
Click Apply>>OK Then auremo blg3
It will say connected, and show the files i have uploaded via winscp to /home/music. Drag chosen items to the right side and click play and enjoy. Of course you can play web radio streams/local vlc streams(described on my previous post) by auremo. And i think this is a awesome front-end for the cute little router.

wifi Robot – 3

July 14, 2013 § 3 Comments

I have gone a little bit far away from making robot to making a wifi speaker.

Now, at present i will tell you about how i have converted a TP-Link Tl-MR3020 Router to a wifi-sound system or wifi-sound-box or wifi-speaker whichever you prefer/like to call the project.

Ok, after installing the a new usb pendrive(a 8gb pendrive with 75000 mb avilibility) which is partitioned as 500 mb as linux swap and 7 gb of linux ext4 formatted filesystem. And it is installed by my previous posts.

After mounting the pen drive the system says just like the following picture:

blg1

Then i have installed the packages kmod-usb-audio and kmod-sound-core by this command in ssh.

opkg update
opkg install kmod-usb-audio kmod-sound-core

After success, the basic support of sound is installed. Now, we have to install an audio player. At starting point, we will use an easier one. For that i have selected madplay. To install madplay, insert the following command and then press enter in ssh.

opkg install madplay

After success, attach your usb sound card and restart router. I have used the following cheapest sound card.

dbf9e868-c309-4601-b9c0-faebb79803fa

Then re-login using your putty and also with winscp. Browse with winscp to this folder /www/cgi-bin make a file there named index.cgi and paste the following code(this code is for testing only, it is not optimized).

</pre>
#!/bin/sh
#!/www/cgi-bin/80sonly

&nbsp;

echo "Content-type: text/html"
echo ""
echo "<html>"
#echo "<body bgcolor='#000000'>"
echo "|------[ ] <font size="5" face="Monaco"><a href="off.cgi">Turn OFF</a></font><br/>"
echo '<a href="../StartAudioStream.vbs" target="_blank">Download Script</a>'

echo "My IP IS : ${REMOTE_ADDR}"

echo "<form method=GET action=\"${SCRIPT}\">"\
 '<table nowrap>'\
 '<tr><td>IP</TD><TD><input type="text" name="val_x" size=12 value="'${REMOTE_ADDR}'"></td></tr>'\
 '<tr><td>Port</td><td><input type="text" name="val_y" value="8085" size=12 value=""></td>'\
 '</tr></table>'
echo '<br><input type="submit" value="Apply">'\
 '<input type="reset" value="Reset"></form>'
 # Make sure we have been invoked properly.

if [ "$REQUEST_METHOD" != "GET" ]; then
 echo "<hr>Script Error:"\
 "<br>Usage error, cannot complete request, REQUEST_METHOD!=GET."\
 "<br>Check your FORM declaration and be sure to use METHOD=\"GET\".<hr>"
 exit 1
 fi

&nbsp;
#sleep 1
#kill $(pidof madplay)

# If no search arguments, exit gracefully now.

 if [ -z "$QUERY_STRING" ]; then
 exit 0
 else
 # No looping this time, just extract the data you are looking for with sed:
 XX=`echo "$QUERY_STRING" | sed -n 's/^.*val_x=\([^&]*\).*$/\1/p' | sed "s/%20/ /g"`
 YY=`echo "$QUERY_STRING" | sed -n 's/^.*val_y=\([^&]*\).*$/\1/p' | sed "s/%20/ /g"`
# echo "val_x: " $XX
# echo '<br>'
# echo "val_y: " $YY
# echo '<br>'
wget -O - http://$XX:$YY/ | madplay -&

fi

echo '</body>'
echo '</html>'
<pre>

Then save it, right click again on the file>properties and make the property like the following picture(executable) and click ok.blg2

Then make another file there named off.cgi and paste the following codes :

</pre>
#!/bin/sh
#!/www/cgi-bin/80sonly
sleep 1
kill $(pidof madplay)
#killall madplay
echo "Content-type: text/html"
echo ""
echo "<html>"
echo "<body bgcolor='#000000'>"
echo "wait..."

#sleep 1
#kill $(pidof madplay)
#sleep 1
#opkg update
#opkg remove madplay
#opkg install madplay --force-depends --force-maintainer

echo "|------[ ] <font size="1" face="Monaco"><a href="index.cgi">Turn ON</a></font></br>"
echo "|------[ ] <font size="1" face="Monaco"><a href="off.cgi">Turn OFF</a></font>"

#wget -O - http://streaming206.radionomy.com:80/80sOnly | madplay - &
echo "</body>"
echo "</html>"
<pre>

Then, make the file(off.cgi) also executable.

Then  the configuration of the router aka wifi speaker is finished. Now, we need to configure our desktop/laptop to stream sound over lan/wifi.

for this, download vlc media player from here. Install it, Run it. Then configure it like the following pictures.

Click Media>Stream

blg3

Then click Capture Device and set everything like following picture.

blg3

click configure button of audio device name and set everything just like following.

blg3

If you can’t find stereo mix in the pin line drop-down menu, you need to google for it. After that, click OK click Stream, then the following window appears.

blg3

Click Destination Setup>New Destination(select HTTP from dropdown)>Add

blg3

Select Port=8085 and profile audio-mp3 and then click Stream.

blg3

Then you will get the window.

blg3

Then click the little vlc icon in the system tray and vlc window will disappear. For those who dont know what the system tray is –

blg3

Then with your router connected with lan and a speaker is connected with the usb sound card which is connected with the usb hub with the router, go to your favorite browser, type the following address YOUR ROUTER IP/cgi-bin/index.cgi in my case it is :

blg3

It will automatically detect your PC IP. In my case my local pc ip : 192.168.1.110 and my router ip is 192.168.1.250. You dont need to change anything here. Click apply and you can hear the audio played into your PC.

If any problem, then you have missed something. Although i have not told everything briefly coz your best friend google is there for you to help(yeah it helped me to do this project). And if you can please comment of your problems, i must help you if i can.

And another post will come later related this subject with much more controlling from desktop.

Wifi Robot – 2

June 27, 2013 § 3 Comments

Adding a Serial Port (Usb To Serial Converter) To TL-MR3020.

To connect a arduino, a serial port is necessary. I have used here a FT232RL usb to serial converter to acheive this.

The software installation/settings script is here. You must install drivers, and for communication,  socat is necessary.  The program ser2net hangs after few hundred bytes transmission.

You dont need to add a startup script (this socat tcp-l:1234,reuseaddr,fork file:/dev/ttyACM0,nonblock,raw,echo=0,waitlock=/var/run/tty,b9600) directly to /etc/rc.local or system>startup. I don’t know why but it hangs the function of indicator leds. Though the router works fine.

Instead you need to add this script (somewhat edited from here) to a file via winscp.

Say the file name is /etc/serial1234.sh


#!/bin/ash

DEV=/dev/ttyUSB0
PORT=1234
BAUD=115200

while true; do
 if [ -e $DEV ]
 then
 socat tcp-l:$PORT,reuseaddr,fork file:$DEV,nonblock,raw,echo=0,waitlock=/var/run/tty,b$BAUD
 else
 sleep 2
 fi
done

Save this script and make this executable. And then system>startup tab or, /etc/rc.local before exit 0 add a line. this file should look like this.


# make sure it's above 'exit 0'!

/etc/serial1234.sh &

exit 0

Then the program socat will run whenever you connect the FT232RL in the USB port.  And you can connect it by putty at your routerip:1234 and RAW connection.

After this i will make a vb program to connect without putty and control arduino by keyboard buttons. Of course I must program the arduino too.

More about this comes later.. till then…

Wifi Robot

June 23, 2013 § Leave a comment

Its about a wifi robot that i am planning to build.

I have spent a lot-lot more time in the internet. And still doing that damn thing. I am losing the hours of my limited lifetime on the internet. I is not the subject i want to say, so, I will say about this matter later.

Ok, while browsing the internet about electronics project, I have found a wonderful eye-catching project that forced me to change my plan, and changed the way i think to achieve something(making a RC car/robot).

And it’s here.

Its a awesome project. I have planned to collect the router and other parts and build it in earlier 2009.

But the router Linksys WRT54GL seems not available everywhere(I mean most of the computer selling shops) in Bangladesh. I didn’t lose hope. I continued searching and found it in the ending of(september-october) 2011. It was a little bit overpriced for me. I was doing a job at that time and my salary was 6500/-BDT but the router costs approx 6000 BDT. I started to keep some money savings every month for buying that shit.

At the middle of 2012 i found a second-hand WRT54G from a person. It costs 2200/-BDT. I was so excited but after starting to install linux in it i was hopeless this time. It was WRT54G V5 and has a big difference from WRT54GL . Though both are looks alike. I have succeded to install DD-WRT firmware into it. And I was more hopeless when i saw the cost of a simple ip camera is over 15000/-BDT in Bangladesh. It was heartbreaking for me.

I was searching for a low cost wifi-camera-robot solution. Then at a wonderful time(it got wonderful when i found it) I found a solution.

Some routers(high cost) have a built-in usb port. If we install OPENWRT into that router and some software packages, we will be able to add a USB Webcam/flash drive/harddisk/Printer/USB-to -com port converter/Whatever you mean cause its linux operating system.

Then i searched for low cost usb routers, found some, and picked out a choice from one of them by cost/lightweight/small footprint etc.etc.

It was TL-MR-3020 Details here

images

I have planned to make the wifi robot with the router. How to do some of the work of  this project. Here.

Then installed OPENWRT . Details here.

You can follow all above the para <Installing LuCi WebGUI>. Or here.

All seemed well but i have managed to brick the router for my fault. And i have succeeded to recover it at next day, after more than 4 hours of work. Details here.

And after success, i have collected a 1GB pendrive from one of my friends. and attached it as a additional memory of MR3020. Details here.

Ok. Thanks for coming to my blog. More about this matter will come out later. Till then………

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