• UsbAudioHowto2

1. HOWTO turn your USB enabled Router into the coolest Alarm clock ever

This HOWTO is a work in progress, I have it running, but need to recreate all the steps. This message will be removed once everything is in place.

1.1. Goals:

If you follow this HOWTO you should end up with a machine capable of:

• Playing mp3/ogg/flac from any mountable source (usb-storage, shfs, cifs, nfs)
• Using your Router as an alarm clock
• Controlling snooze and alarm times from a bluetooth enabled phone

1.2. Prerequisites:

These are the parts i used to achieve the above.

• Asus WL500g Premium Router
• As of writing: Kamikaze r11112
• A supported USB Bluetooth dongle
• A supported USB Soundcard

1.3. Caveats:

Things which still bother me

• I had to disable USB2 support completely as it would not work with my USB hub

• anyremote is not yet in OpenWRT, I submitted my files here: [https://dev.openwrt.org/ticket/3433]

• I wanted to be able to plug USB sticks with music in and just have them added to mpd, which required me to hack the usb-storage scripts: [https://dev.openwrt.org/ticket/3432]

• It is not possible to mount DAAP shares, maybe with a 2.6 Kernel and fuse-daap

1.4. HOWTO:

• Flash your router with a recent Kamikaze build
• If required, install the provided usb-storage scripts

  • You can then add handlers to /etc/usb-handlers.d/ to e.g. link added music to your mpd music directory

• Disable USB2 and OSS if necesarry:

  • rm -f /etc/modules.d/50-usb2

  • rm -f /etc/modules.d/60-usb-audio

• Make sure the following packages are installed:

  • anyremote - remote control program

  • mpd - the music player daemon

  • mpc - mpd control program

  • at - run programs at specific times, used for snooze and alarm

  • ntpclient - make sure you get up on time

  • bash - I think i used some bash features somewhere

• Set your timezone in /etc/TZ (e.g. Germany: CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00)

• Set your mpd up to use ALSA by uncommenting the ALSA config entries in /etc/mpd.conf

• Create the mpd directories mkdir -p ~/.mpd/playlists

• Enable sdpd in /etc/config/bluetooth

• Set auth type in /etc/bluetooth/hicd.conf to auto, set passkey to something usable (e.g. 6712)

• Pair your phone with the router

• Put the following scripts in /usr/bin/

/usr/bin/alarm - example: alarm 7:00 will set an alarm clock for 7:00

#!/bin/bash
if [ -z "$2" ]; then
        vol=50
else
        vol=$2
fi
echo "/usr/bin/alarm_play $vol" | at $1

/usr/bin/alarm_play - helper script for the alarm

#!/bin/sh
if [ -z $(mpc | grep playing) ]; then
        mpc --no-status clear
        mpc --no-status load alarm_pl
        mpc --no-status volume 0
        mpc --no-status random on
        mpc --no-status play
        mpc --no-status pause
        echo $1 > ~/.ppvolume
        /usr/bin/pp &
fi

/usr/bin/pp - fade sound in and out, this might be doable in a better way

#!/bin/bash

sleep="1s"
fade_sec="10"

curvol=`mpc | grep "volume" | cut -d " " -f2 | tr -d "%"`
if [ -z "`mpc | grep playing`" ]; then
    mpc play --no-status
    start=0
    end=`cat $HOME/.ppvolume`
    inc=$(($end/$fade_sec))
else
    echo $curvol > $HOME/.ppvolume
    start=$curvol
    inc=-$(($curvol/$fade_sec))
    end=0
fi
#echo $start $inc $end
for x in `seq $start $inc $end`; do
    mpc volume $x --no-status
#    mpc volume $x
    sleep $sleep
done

if [ $end -eq 0 ]; then
    mpc volume 0 --no-status
    mpc toggle --no-status
else
    mpc volume $end --no-status
fi

• You need a playlist alarm_pl in mpd which will be played at random for alarm