ECE597 Project NodeRed Voice

Revision as of 11:35, 13 November 2014 by Dmitryvv (talk | contribs) (Installing Jasper on raspberry Pi)
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thumb‎ Embedded Linux Class by Mark A. Yoder

Team members: Dmitry , Matt Olson

Grading Template

I'm using the following template to grade. Each slot is 10 points. 0 = Missing, 5=OK, 10=Wow!

00 Executive Summary
00 Installation Instructions 
00 User Instructions
00 Highlights
00 Theory of Operation
00 Work Breakdown
00 Future Work
00 Conclusions
00 Demo
00 Late
Comments: I'm looking forward to seeing this.

Score:  10/100

(Inline Comment)

Executive Summary

Our project has branched out along several paths since it's inception. The goal was to create a personal assistant that could listen to commands, talk back, and perform them. For modularity, our original goal was to use IBM's Node Red to accomplish this. However, Node Red is not designed for the complicated and workflows that we needed, and extensions were not scale-able. In this document we are going to describe three things.

  • A simple node red speech recognition and synthesis system
  • Using the open source jasper project on Raspberry Pi
  • Using the open source Jasper project on Beaglebone Black

The simple node red speech synthesis will essentially listen to the user, and the repeat back what is said. Currently the speech synthesis is working, and we are trying to integrate pocket sphinx for the speech recognition.

Jasper was developed with the Raspberry Pi, and as a result has a very simple set up procedure. Our goal is too use this platform to begin developing modules. We currently have working versions of jasper installed and have 2 modules developed.

There are no reliable installation instructions for setting up Jasper on the Beaglebone black. We have done the research, and are hoping to be able to provide concise installation instructions and port over our work.


Jerry Talyor of Mansfield, IN is going to make a fantastic wooden laser cut and laser engraved box for us.

Installation Instructions

List of required hardware

Raspberry Pi Beaglebone Black
USB mic, power supply, Edimax USB wi-fi, speakers USB audiocard, USB/Audio-In mic, speakers
  • Note: Internet connectivity is an important part of the project as we are using the Google Speech API for voice recognition in the current revision.

Setting up Network on RPi

There are two options for the internet access: wired connection and wi-fi connection. Both are very easy to manage with wicd connection manager with wicd-curses user interface.

To get wicd installed, plug the ethernet cord (assuming the initial raspbian installation it should work right out of the box) and then run:

sudo apt-get update
sudo apt-get install wicd
sudo apt-get install wicd-curses 

Alternatively /etc/network/interfaces file should be edited to include all of the following:

auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
auto wlan0

iface wlan0 inet dhcp
        wpa-ssid "ssid"
        wpa-psk "password"

This also allows auto-connect to a wireless network specified on a startup.

Setting up Network on Beaglebone

Being processed.

Installing Jasper on raspberry Pi

Follow the instructions provided on the documentation page to install JASPER

The modules we have implemented use the python RPI.gpio library, run the following commands to install it

sudo apt-get update
sudo apt-get install python-dev
sudo apt-get install python-rpi.gpio

Installing our custom Modules to demonstrate Jasper

git clone
cd woodoo
chmod +x

By default Jasper uses pocketsphinx as a voice recognition platform and it was found to produce a low quality recognition so we decided to move to Google Speech.

  1. Follow the directions here to get API public key for the jasper.
  2. From the jasper directory navigate to clients directory and run python
  3. Provide all the information and when prompted to enter STT enter 'google' and then enter your API key when asked.
  4. Check that everything is good to go by running jasper. It is common to have a few errors during the first startup but don't panic, as there is a very helpful Google Group and FAQ maintained by Jasper authors.

Installing Jaser on Beaglebone Black

Being processed

User Instructions

To start jasper, navigate to the jasper directory and run the following command


Jasper will initialize everything, and if everything is connected properly, should prompt you for a command. The typical use case is to say Jasper for it to begin listening, wait for a high pitched beep, say your command, and then wait for another lower pitched beep for a confirmation.

You: Jasper
Jasper: *BEEP*
You: What time is it.
Jasper: *BEEP*
Jasper: It's currently now.


Here is where you brag about what your project can do.

Include a YouTube demo.

Theory of Operation

Our project uses the opensource Jasper project as it's backbone. The system is constantly listening to it's surroundings, and when it finds a discrete sound block sends it to the google voice API for analysis. Google voice returns text blocks of what it thought the sound click was of. Jasper then runs it across modules looking for a hit, and then executes a command if it finds one.

Completed Tasks

Matt Olson

  • Node Red Installed - 10/20/2014
  • Wi-fi dongle working - 10/22/2014
  • Created Module for Jasper - 10/28/2014
  • Created install script for installing modules on RPi - 11/12/2014

Dmitry Votinstev

  • Speech recognition software installed - 10/20/2014
  • Sound recording/payback with arecord aplay works 10/22/2014
  • Ported Jasper to Work on the Google voice API 11/12/2014

Tasks Remaining

  • Develop Additional testing modules - Matt, Dmitry
  • Get Jasper working on BBB - Matt, Dmitry

Future Work

Suggest addition things that could be done with this project.


Node Red does not provide a very good architecture for acting as a speech recognition system and dispatcher, which resulted in our choice to investigate other options.

thumb‎ Embedded Linux Class by Mark A. Yoder