How To Train A Custom Wake Word For Google Assistant Using Snowboy

Following up to my primer on using Snowboy for custom Google Assistant wake words, in this video, I’ll walk you through using Snowboy’s “Hotword As A Service” to train your own wake words.

PARTS/TOOLS:

Google AIY Voice Kit

Raspberry Pi 3B+ (with appropriate SD card and power supply)

RESOURCES:

Snowboy

3D Printed Arduino Logo Wall Tile

Inspired by scouting merit badges, Atari decides to start a tile wall to celebrate his achievements. To celebrate building his first online course (Arduino For Kooks), he’s going to design a tile based on the Arduino Community Logo–a frenetic jumble of multicolored shapes forming the Arduino “infinity” logo. Since his 3D printer only has one extruder, he decides to paint and assemble the differently colored pieces for a nice, lo-fi aesthetic.

Download the STL files

Bill of materials:

Inland 2.85mm Silver PLA 3D Printer Filament

Craft Smart Acrylic Paint Value Set

Soldering Supercut: The RC2014 Homebrew Z80 Computer Kit (Long Play)

Assembling and soldering Grant Searle’s Z80 homebrew computer kit, the RC2014. This is a long-play video with no commentary. just some groovy tunes by the one-and-only Anders Enger Jensen. Sit back, grab a beverage, and chill to the vibes.

Watch the fully annotated video on element14: LINK
Check out more of Anders’s music here: https://www.youtube.com/user/HariboOSX

How To Replace A Key Fob Battery

Today’s automobiles are more like computers with wheels. As such, modern conveniences like keyless entry and ignition are the new standard, but eventually, your key fob’s battery will die–necessitating a replacement. Dealerships often charge over-inflated prices to replace a single CR2025 battery in under five minutes. In this video, learn how to replace a key fob battery and save a lot of time and headache!

PARTS/TOOLS:

CR2025 Battery

Warranty Voiding Tool Kit

Mego 2XL Robot Teardown

The Mego 2XL Robot is an interesting piece from the very beginning of interactive electronic toys. The 1970s 2XL incorporated little more than a modified 8-track player to provide hours of entertainment on specially-formatted cassette tapes. In this Mego 2XL teardown, we’ll look at how the toy was built, the basic working mechanism, and attempt to diagnose a 2XL not working.

RESOURCES:

2XL Documents (contains US Patent and component data sheets)

How To Set Up OctoPi

I have a couple of new 3D printers that I need to build OctoPi servers for, so in this video, we’ll walk through how to set up OctoPi and attach it to most 3D printers.

OctoPi is available from OctoPrint.org

Etcher is available for Mac, Windows, and Linux at Balena.io

Benchy Quick Print by Thumper72 is available on Thingiverse

3D Printing a Coffee Mug Cupholder Adapter

Ever notice how your coffee mugs NEVER fit in the standard cup holder–often leading to catastrophic spills, burnt legs, and general angsty bad days? Is that just me? Fear no more, for I have solved this particular conundrum with a little bit of ingenuity and a healthy dose of 3D printing! Let’s 3D print a solution to this age-old problem of oversized coffee mugs and undersized sofa cupholders!

Want to remix this design (or just build your own?) Download the STL files

How To Use A Custom Wake Word With Google Assistant

The new voice assistants like Siri, Cortana, Alexa, and Google (itself?) are becoming more and more ubiquitous as we race toward a “Star Trek”-style omnipresent computing interface, but what if you don’t like invoking the name of your chosen corporate overlord when you use the assistant’s features? What if you could speak “Okay, Computer” into an Apple mouse like Scotty did? In this video, I’ll show you how to set up a custom wake word with your voice assistant using a platform called “Snowboy”.

 

PARTS/TOOLS:

Google AIY Voice Kit

Raspberry Pi 3B+ (with appropriate SD card and power supply)

RESOURCES:

Snowboy

Snowboy GitHub

GassistPi GitHub

How To Set Up Google AIY

How To Set Up Google Assistant On The Matrix Creator Development Board

Google Actions Console

Google Developer Console

How To Set Up Snowboy On Raspberry Pi:

Install the Sox, PortAudio, and PyAudio dependencies
sudo apt-get install python-pyaudio python3-pyaudio sox
pip install pyaudio

Install Swig by compiling from source
wget http://downloads.sourceforge.net/swig/swig-3.0.10.tar.gz
tar -xvf swig-3.0.10.tar.gz
sudo apt-get install libpcre3 libpcre3-dev
cd swig-3.0.10
./configure --prefix=/usr\
--without-clisp \
--without-maximum-compile-warnings &&

make
make install &&
install -v -m755 -d /usr/share/doc/swig-3.0.10 &&
cp -v -R Doc/* /usr/share/doc/swig-3.0.10

Install the Atlas library
sudo apt-get install libatlas-base-dev

Verify audio recording and playback work
arecord -f cd -d 5 test.wav
aplay test.wav

Clone the Snowboy repo
https://github.com/Kitt-AI/snowboy.git

Compile the Snowboy Python wrapper
cd snowboy/swig/Python
make

Run the Snowboy demo with the “Snowboy” wake word
cd snowboy/src/examples/Python
python demo.py /home/pi/snowboy/resources/models/snowboy.umdl

How To Set Up GassistPi On Google AIY:

Clone the GassistPi repo
git clone https://github.com/shivasiddharth/GassistPi

Install the AIY hat configuration
sudo chmod +x ./GassistPi/audio-drivers/AIY-HAT/scripts/configure-driver.sh
sudo ./GassistPi/audio-drivers/AIY-HAT/scripts/configure-driver.sh
sudo reboot
sudo chmod +x ./GassistPi/audio-drivers/AIY-HAT/scripts/install-alsa-config.sh
sudo ./GassistPi/audio-drivers/AIY-HAT/scripts/install-alsa-config.sh

Confirm that your audio still works
speaker-test -t wav

From here, you’re going to use the credentials as well as the project and device IDs created when you first set up the Google AIY kit. Refer to the how-tos above if you haven’t gotten this far yet.

Run the installer script (this will take a while)
sudo chmod +x ./GassistPi/scripts/gassist-installer.sh
sudo ./GassistPi/scripts/gassist-installer.sh

As the script finishes, you will be presented with a unique URL for authentication. Copy that URL into a browser, sign in to Google, copy the authentication code, and paste that at the prompt in the terminal.

You can now run Google Assistant via GassistPi which allows intricate customization options as well as custom wake words via Snowboy. Configure these options by using a text editor with ~/GassistPi/src/config.yaml

Run Google Assistant with the following command:
/home/${USER}/env/bin/python -u /home/${USER}/GassistPi/src/main.py --project_id [your project ID] --device_model_id [your device ID]

How To Set Up Google Assistant On The Matrix Creator Development Board

The Matrix Creator is an IoT-centric development board that comes with a wide array of goodies that facilitate hardware development such as an FPGA, various accelerometer and environmental sensors, IR transceivers, and even an 8-microphone array that can be used for echolocation as well as omnidirectional listening. It’s this microphone array that makes the Matrix Creator (and it’s smaller sibling, the Matrix Voice) an ideal platform for developing your own AI assistant! In this video, we’ll look at installing and setting up Google Assistant and see how it compares to the dedicated AIY hat from a previous video.

PARTS/TOOLS:

Raspberry Pi 3B+ (with appropriate SD card and power supply)

Matrix Creator

RESOURCES:

Matrix Labs GitHub

Installing the Matrix kernel modules:

Add the repository key
wget https://apt.matrix.one/doc/apt-key.gpg | sudo apt-key add -

echo "deb https://apt.matrix.one/raspbian $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/matrixlabs.list

sudo apt-get update
sudo apt-get upgrade

Install the packages
sudo apt install matrixio-creator-init

Reboot and install the kernel modules
sudo apt install matrixio-kernel-modules

Reboot and install the Google Assistant SDK per their instructions:

Now, you could run the Google Assistant at this point and everything will work just fine, but the fine folks at Matrix Labs actually put together a nice little application that adds color-changing lights and other little niceties to the stock Assistant installation

Clone the Matrix Google Assistant repo

git clone https://github.com/matrix-io/google-assistant-matrixio.git

Then run the program using the project and model IDs from the SDK setup
~/google-assistant-matrixio/google-matrixio-assistant-hotword --project_id [your-dev-project-id] --device_model_id [your-model-id]

Assistant will run and respond to the standard “OK, Google” or “Hey, Google” hotwords.

How To Set Up The Google AIY Voice Kit

AI voice assistants are the latest new hotness to come out of Silicon Valley, but before they were in every electronics department, they were much the exclusive playground of the DIY tinkerer. With kits like Google’s AIY line, hackers and makers can build their own voice assistants with little more than the good ol’ Raspberry Pi! In this video, I’ll walk you through how to set up the Google AIY Voice kit on a Raspberry Pi and run one of the demo python scripts to start building your own voice interfaces!

PARTS/TOOLS:

Google AIY Voice Kit

Raspberry Pi 3B+ (with appropriate SD card and power supply)

RESOURCES:

AIY Custom Raspbian http://aiyprojects.withgoogle.com/

Google Developer Console http://console.developers.google.com

Etcher

If you’re having trouble with segmentation faults crashing the Python demos, invoke these commands as Pi to install the earlier Google Assistant Library Python modules:

pip3 install google-assistant-library==1.0.0
pip3 install google-assistant-library

If you’re receiving the following error message

File "/home/pi/AIY-projects-python/src/aiy/assistant/auth_helpers.py", line 75, in _credentials_flow_interactive
webbrowser.register('chromium-browser', None, webbrowser.Chrome('chromium-browser'), -1)
TypeError: register() takes from 2 to 3 positional arguments but 4 were given

Then change line 75 in /home/pi/AIY-projects-python/src/aiy/assistant/auth_helpers.pyto the following:

webbrowser.register('chromium-browser', None, webbrowser.Chrome('chromium-browser'), preferred=True)

Be sure to keep the indentation and spacing the same as the original as it the code is sensitive.

Adventitious Geekery and other distractions created or curated by Matthew "Atari" Eargle