(RTL SDR DVB-T Dongle RTL2832U) that is tuned to the NOAA frequency. Raspberry Pi or Beagle Bone Black with a dedicated USB Software Defined Receiver The eventual goal will be to pair a Micro-computer like the This would be a modernized version of the ComputerĪlert Interface that I documented 15+ years ago. Transmitted by the NOAA weather station located in your geographic area. Own digital decoder that responds to Specific Area Message Encoded (SAME) alerts You pair it with your own receiver) the following will show you how to build your Repeaters no longer sells the cheaper WD-100 weather decoder (the one where Might as make it your default sound device, for both input and output:Įdit /etc/modprobe.d/nf comment out "options snd-usb-audio The Raspberries GPIO to control a LED/relay, or power a solenoid to flush your You can have it speak responses using festival In the perl script, you can change the on trigger command strings to your Now you'll start multimon-ng using the script like so: :~#. Grab a copy with wget and then make it executable: :~# wget You'll have to use a perl script to interact with multimon's output. You can see in the screen output above I sent three DTMF 5's, and that is If something goes to crap, you can stop the pulseaudio daemon with: pulseaudio D Also try starting it using the full path: /usr/local/bin/multimon-ng Make sure you have the pulseaudio daemon started: pulseaudio Pa_simple_new() failed: Connection refused If you get this error, when you try and start multimon-ng. Multimon-ng (C) 1996/1997 by Tom Sailer HB9JNX/AE4WAĪvailable demodulators: POCSAG512 POCSAG1200 POCSAG2400 EAS UFSK1200 CLIPFSK FMSFSK AFSK1200 AFSK2400 AFSK2400_2 AFSK2400_3 HAPN4800 FSK9600 DTMF ZVEI1 ZVEI2 ZVEI3 DZVEI PZVEI EEA EIA CCIR MORSE_CW DUMPCSV SCOPE Start multimon-ng like so: :~# /usr/local/bin/multimon-ng -a DTMF Start the pulseaudio dameon: pulseaudio -D Get the source and compile it: mkdir ~/src Sudo apt-get -no-install-recommends -y install git cmake libusb-1.0-0-dev libpulse-dev libx11-dev screen qt4-qmake libtool autoconf automake libfftw3-dev multimon-ng uses pulse audio: sudo apt-get update Had to manually provision nf for example since late 2013.įor gods sake, give yourself root access. I recommend the SYBA SD-CM-UAUD USB CM119 audio adapter.īut a lot has gotten easier since early 2013 when the Wheezy kernel support and Since the Raspberry Pi lacks a sound input, obviously you'll be adding a USB The rest of this document will show you how to get multimon-ng installed on the Open source community listening and their efforts. In 2010 I blogged about the need for an open I could receive text message alerts when a matching Fire/EMS two tone was In the past I have even changed the DTMF tone definitions (defined in Hz) so Using the DTMF demodulator,įor example you can use it to perform various functions when it hears/sees a matching Script to watch it's output it can be used to do things. It decodes a number of things, and with a In an updated fork of multimon by Elias Oenal. Multimon was originally written by Tom Sailer HB9JNX/AE4WA in 1996.
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