Mindstorms Speech Synthesis
Sometimes data is better read out as an audio indication, rather than written on a display.
A speaking voice can be added to Mindstorms inventions with a speech synthesizer installed on a Raspberry Pi. I used a
package called espeak, which can be added by the command:
sudo apt-get install espeak
The resulting voice sound is rather robot like, as can be heard in the video above. The voice reads out measurements from a Mindstorms Ultrasonic Sensor whenever a Mindstorms Touch Sensor is pressed. The Mindstorms sensors are hosted in this example with a BrickPi3 from Dexter Industires. As I used in my blog post on LEGO Drum Machine, I took the audio output from the Raspberry Pi on a USB audio adapter. The BrickPi3 is controlled with a Python program, calling espeak by a function of
os.system('espeak -s125 -ven-us" --stdout | aplay -D plughw:1'.format(something))
prior to this function a library has to be imported: