Raspberry Pi based answering Ganesha

This project is about using Raspberry pi with USB microphone and Speaker for interactive answering machine. We are calling it Talking Ganesha. In Hindu Culture , God Ganesha is called as God of Knowledge. We have created this project just to create Talking Ganesha in Ganesh Festival. We have used Google Speech API for converting speech to text, WolfarmAlpha API for answering questions and then eSpeak to speak out the answer return by WolframAlpha.

It is based on initial work done by Mr Dave. His instruction can be found in “http://makezine.com/projects/universal-translator/.

This project was developed with the help of Utsav (my Infosys team mate) and Suhas (Vigyan Ashram Fab Lab Instructor)Raspberry Pi based answering Ganesha

You need following hardware :

1. Raspberry Pi B+

2. Sound Card (In case you don’t have USB headphone or USB Mic + Speaker)

3. Headphone or Mic + Speaker with audio jack

4. Internet Connection

Step 1: Set up Raspberry Pi

(This is taken from step 1 of Universal Translator “http://makezine.com/projects/universal-translator/)

Assuming you have Raspbian installed on your Raspberry Pi.

Update the software on your Raspberry Pi: sudo apt-get update sudo apt-get upgrade

Install the software required for this project with following commands:

sudo apt-get install python-pip mplayer flac python2.7-dev libcurl4-gnutls-dev

# To get object via any HTTP request e.g. calling Speech API from python script

sudo pip install requests pycurl

# To get answers for your questions

sudo pip install wolframalpha

# To manage sound / audio devices

sudo apt-get install alsa-utils

# To convert text to speach

sudo apt-get install espeak

# We shall use google Speech API to convert Speech to Text

Step 2: Create Google Sppech API Key and Wolfram API Key

Download required python and shell scripts.

Create new folder called “Talking Ganesha” inside home folder

Download the following scripts from download section :




Execute command on Raspberry Pi

sudo chmod +x stt.sh

Google Speech API Key :

Use instructions from http://makezine.com/projects/universal-translator (Step 4).

This google api key shall be used in script “text-to-translate.py (key=’GoogleKey’)

For Wolfram Key :

http://products.wolframalpha.com/api/ Raspberry Pi based answering Ganesha schematich

Sign Up

Complete Form to activate your account

Click on Get an AppID button on right

Enter application Name and Description

Now copy APPID.

This key shall be used in script “queryProcess.py” (app_id = “WolframAlpha Key”)

Note that you can make 50 calls to Google Speech API (per day) and 2000 calls to Wolfram Alpha API (Per month). And this usage must be restricted to personal use (non commercial).



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