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Topic: Voice Recognition Printing Project - Using Arduino and Android device (Read 1 time) previous topic - next topic


Hi Arduino Forum,

I have an ambitious project in mind which I would like to ask your advice on.

My goal is to build a set up which records spoken phrases and transcribes them to text (possibly utilizing Google's speech input API) before outputting them via Arduino to a thermal printer (https://www.sparkfun.com/products/10438)

I see the topic was raised by MarcoMarazzo in this old thread: http://arduino.cc/forum/index.php/topic,86887.msg653887.html#msg653887

My current thinking on how to achieve this is to utilize an android handset running Android 2.1 or above and then to use the voice-enabled-keyboard in conjunction with 'Bluetooth Chat' application to record speech and pair it with the Arduino via bluetooth modem, similar to what is achieved in this tutorial: http://www.youtube.com/watch?v=_1fQxE-TVio

Seeing as I am relatively new to both Arduino and programming I am looking to achieve my objectives in the simplest (and also most cost-effective way possible)

At the moment I am unconcerned about the accuracy with which speech is transcribed. I also anticipate that I may end up only able to process shorter snippets of speech rather than long recordings - that's fine!

Have any of you embarked on a similar project?

Is there a better way to achieve my objectives?

Would be great to know if I am heading in the right direction, therefore any advice or input would be much appreciated!

Many thanks,



I am certainly no Android expert, but it would seem that the Arduino is not really necessary.  All the printer needs is a TTL serial input, and the phone should be able to supply that directly. 




That sounds like an excellent project.

For the Android speech recognition, I suggest using this abstract class from https://github.com/gast-lib/gast-lib/blob/master/library/src/root/gast/speech/SpeechRecognizingAndSpeakingActivity.java

And if you want to read more about how the speech recognizer works, read this book: http://www.amazon.com/Professional-Android-Sensor-Programming-Programmer/dp/1118183487/


Hi I really appreciate your suggestions guys. I'll be making progress with the project this week :)


Nov 08, 2012, 11:43 pm Last Edit: Nov 09, 2012, 02:50 am by leandro4b Reason: 1
If the sentences you are going to recognize are predictable ("controlled" environment), BitVoicer (http://www.bitsophia.com/BitVoicer.aspx) can recognize unlimited sentences and send up to 60 characters to you board in response to the recognition. I don't know which sentences you need to send to the printer, but BitVoicer's Voice Schema can create hundreds of recognition possibilities with a few words. I hope it helps.

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