Plug in a USB microphone
Increase mic volume for USB device to full using
alsamixer
(F6 to change to USB device and arrow keys move across to Mic and up arrow increases volume to full, Esc to quit)
Make a test recording:
arecord -D plughw:1,0 -f S16_LE test.wav
CTRL-C to quit
aplay test.wav
Sign up to Google cloud platform for free
https://console.cloud.google.com/start
Google Cloud Speech API -> go to Credenitials tab -> Create Credentials -> API Key -> cut and paste your API key for use in speechAnalyser.py later
sudo apt-get install mplayer
sudo apt-get install sox
sudo apt-get install flac
sudo apt-get install python-pycurl
sudo apt-get install python-pip
sudo pip install feedparser
sudo pip install yahoo-finance
search for stock/share symbols at https://uk.finance.yahoo.com/lookup/ and edit getShares.py to suit.
while in folder /home/pi pull ZIP file from our server with
wget www.securipi.co.uk/vr.zip
unzip vr.zip
chmod a+x speech.sh
edit speechAnalyser.py so it contains your Google Cloud Speech API key
nano speechAnalyser.py
save it and exit
run it while connected to the internet
python speechAnalyser.py
say the trigger word “oscar”, wait for a beep, and then say either “news, weather, shares, time, light on, light off, flatter me”
(light on & light off control a red LED with a 220 ohm resistor connected to GPIO4 and GND pins)
You can make a really good room mic, with 15 feet range, using a USB audio adapter and a MAX9812 amplified microphone (cost about £5 for both items on eBay)
You can download our 3D print case design from
http://www.securipi.co.uk/usb-mic-holder.stl
Use a hot-glue gun to secure the boards in place.
http://www.securipi.co.uk/vr.pdf
http://www.securipi.co.uk/vr.zip
With thanks to these web pages:
https://randomconsultant.blogspot.co.uk/2017/01/building-amazon-echo-like-device-with.html
and
https://pypi.python.org/pypi/yahoo-finance
