potmo / raspberry-screamer

A Raspberry pi project that plays sounds when someone sends it a SMS.

####HARDWARE

• Raspberry Pi Zero 1.2
• Huawei E169 HSDPA Modem
• plexgear USB 2.0 hub
• Goobay model 68878 USB 3D Sound

####SOFTWARE USED

• nodejs 4.4.4
• smsd 3.1.15

install

sudo apt-get install libasound2-dev sudo apt-get install smstools sudo apt-get install alsa-utils sudo apt-get install avconv sudo apt-get install sox wget http://www.uugear.com/repo/WittyPi/installWittyPi.sh && sudo sh installWittyPi.sh

Audio stuff

The usb sound card only supports 16 bit signed little endian audio so we need to convert to that.

On the mac install brew install vorbis-tools and to convert ogg to wav oggdec -b 16 -e -s -r -o output.wav input.ogg

to do them all ls *.ogg | xargs oggdec -b 16 -e -s -r

add snd-usb-audio to /etc/modules

update /etc/modprobe.d/alsa-base.conf to

options snd-usb-audio index=0
options snd_bcm2835 index=1

update ~/.asoundrc to

pcm.!default {
    type hw
    card 0
}

ctl.!default {
    type hw
    card 0
}

lsub should say

Bus 001 Device 005: ID 0d8c:000c C-Media Electronics, Inc. Audio Adapter
Bus 001 Device 004: ID 12d1:1436 Huawei Technologies Co., Ltd. E173 3G Modem (modem-mode)
Bus 001 Device 003: ID 0bda:8179 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

aplay -l should say

**** List of PLAYBACK Hardware Devices ****
card 0: Set [C-Media USB Headphone Set], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 1: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

https://wiki.archlinux.org/index.php/Advanced_Linux_Sound_Architecture/Troubleshooting

####START To start the smsd process ./start.sh

####NOTES

• watch out with using usb hubs that are powered. You need to make sure it doesn't backpower since you'll fry your PI. I did.

####TODO

• make polling for messages less frequent
• Make logging less verbose
• make both smsd and the watcher run as deamons
• make smsd and the watcher start on boot and something keeps it alive
• remove played messages from incoming spool
• return a confirmation when a message has been received
• update with proper sounds
• make the sounds overlap a bit