Song-Noise-Recorder

Flutter App that is able to play an .mp3 song (local asset) and records the noise levels(in db) of the song and using mqtt sends the data to a Python desktop app which draws a chart/graph with the results.

Schematics

• Diagram of MQTT Protocol communication

Presentation:

Prerequisites:

• Android Studio with the latest Flutter SDK
• Python IDE (I'm using PyCharm)
• A physical device (mobile phone)

Setup and Build

1. install the python paho-mqtt library using the command pip install paho-mqtt
2. install the python matplotlib library using the command pip install -U matplotlib
3. the flutter dependencies & permissions are already present in the pubspec.yaml/AndroidManifest.xml files and are installed using the command flutter pub get
4. mqtt uses a public free broker provided by EMQ X which is based on MQTT IoT cloud platform, so you don't need to setup anything here
5. enable developer options and USB debugging on your physical device

Run

1. connect a physical device to your computer through USB
2. start the Python mqtt listener
3. select your device in Android Studio and run the app
4. you are done!