AI Sentiment Analysis Tango MP3 Player

One of my childhood memories is my grandfather Vittorio listening music according to his mood. The most heart breaking tangos for sad days and milongas (happier and faster tangos) for sunny days.

Today we post our ideas, fears, hopes and feelings in Social Media. So, what about an Arduino based music player that determines your mood using artificial intelligence algorithms over your Tweets and automatically selects which Tangos to play?

Artificial intelligence sentiment analysis

Sentiment analysis (also known as opinion mining or emotion AI) use natural language processing, text analysis, computational linguistics, and biometrics to identify, extract, quantify, and study affective states.

A common task in sentiment analysis is classifying the polarity of a given text as positive, negative, or neutral, which may seem simple for a phrase like “I’m feeling good today” but a little more challenging for something like “Hurricane again? What a great season!” (ironic)

Example: the tweet “A little sun, a good book... and a Dry Martini” over the PHP sentiment analysis library used in this project gets 0.304 positive score and “Oh boy... I'm tired of hurricanes” gets 0.367 negative score.

Circuits and connections

• DfPlayer mini to ESP D7 and D8 (rx, tx)
• DfPlayer mini to Speaker + and -
• Leds to D6 (red), D1 (green) and D3 (yellow) and GND
• Button to D2 and GND
• Potentiometer to A0, 5V and GND
• Switch between Power Supply 5V and VIN
• Power Supply GND to ESP GND

How does it work

As soon asthe device is turned on, a simple scan is made to verify that all Leds are working. Then, WiFi led will blink until a connection to local router is established.

At this point a query is made to a remote Apache Server running Twitter API and PHP Sentiment Analyzer library. The latest 5 tweets of a user timeline will be considered and a simple “h” will be returned for happy sentiment or “s” for sad sentiment.

The device will parse server response and turn on the green Led (happy) or red Led (sad) It will also point to respective folder (happy tangos in folder 01 and sad tangos in folder 02)

The press of the button will start playing random Tangos in selected folder. The same button will pause. The potentiometer slider is used to control DFPlayer mini digital volume (from 1 to 30)

Custom case

Custom case has been designed with Fusion 360

Demo video

(Turn on English Closed Captions)

Source code

You can find a complete PDF at Github with complete source code (Arduino and PHP server side)

Electronic Arts

Interested in other Electronic Arts projects? https://bandini.medium.com/