- Add alert when not connected to the internet or an error from the fetch call
- Fix MPR121 sensitivity
- Raspberry Pi (2, 3, Zero or Zero W)
- MPR121 Capacitive Touch Sensor
- USB Sound Card
- Speaker with AUX 3.5
- AUX 3.5 to AUX 3.5 cable
We were triyng to create little React app that uses Chrome's Speech Synthesis API to speak after a keypress event generated by a MakeyMakey but we have two problems with this:
- Doesn't work without Internet.
- The API doesn't work with Chromium (default browser for Raspbian, Raspberry Pi OS).
We use the Google Cloud Text-to-Speech API to generate .mp3 for each key event so we can use it offline.
In this example I'm using a Raspberry Pi Zero W V1.1 with Raspbian Stretch Lite.
- Install packages
sudo apt install git mgp123 build-essential checkinstall python-pip python-dev libsdl-image1.2-dev libsdl-mixer1.2-dev libsdl-ttf2.0-dev libsdl1.2-dev libsmpeg-dev python-numpy subversion libportmidi-dev ffmpeg libswscale-dev libavfor mat-dev libavcodec-dev libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev libudev-dev python-smbus i2c-toolsor (havent't try this one yet)
sudo apt-get install python-pygame-
Enable i2c (Nedeed to work with MPR121)
$ sudo raspi-config- Interfacing Options
- I2C
- Select
Yes
-
Install Python 3.6 with the following gist.
- If you can't install pip3.6 packages check this StackOverflow answer.
-
Create credentials for the Google Text-to-Speech API here (You will need to add a billing account).
-
Add variable to
.bashrc
echo "export GOOGLE_APPLICATION_CREDENTIALS=\"/home/pi/rpi-touching-experience/credentials.json\"" >> ~/.bashrc && souce ~/.bashrc- Install dependencies (grab popcorn and open Netflix this is going to take a while)
pip3.6 install -r requirements.txt --user- Generate audio (check that you have Internet if you see that it's hanging in there)
python3 synthesize_text.py-
Install the USB audio card following this tutorial.
-
Execute program
python3 run.py