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!

GitHub

View Github