Modular ESP32 Audio Project Based on the Carenuity Architecture

This project provides a modular and user-friendly solution for building an ESP32-based audio recording and playback device. It integrates a high-quality microphone, wireless connectivity, SD-card storage, optional LED control, and a streamlined setup process without requiring programming skills.

Your Requirements

The system is designed to meet the following functional requirements: integrated microphone for audio capture, ESP32 microcontroller with Wi-Fi and Bluetooth, SD-card storage, physical control buttons, addressable LED support, and complete documentation.

Reference Design

For comparison and inspiration, the following ESP32 audio recorder project demonstrates a related architecture:

• Documentation: https://docs.cirkitdesigner.com/project/published/e39a1639-a2e9-4fa3-92d3-89d96a50dac6/esp32-based-audio-recorder-and-playback-system
• Project view: https://app.cirkitdesigner.com/project/e39a1639-a2e9-4fa3-92d3-89d96a50dac6

Our Concept

The recommended solution is based on the Carenuity S-M-A principle, consisting of Sensor, Microcontroller, and Actuator modules. All blocks are implemented on Triple-Adapters and designed for quick assembly without any technical background. The system can be set up through the Carenuity Solution Builder, which performs all configuration steps automatically.

Solution Builder: https://solutions.carenuity.com

Functional Modules

Sensor Block (S)

MAX9814 electret microphone with integrated amplifier for clean audio capture, including a WS2812B LED output for optional LED strips.

LED reference: https://github.com/wled/WLED

Microcontroller Block (M)

ESP32-WROOM-32 module with Wi-Fi and Bluetooth connectivity, fully compatible with the Arduino IDE.

Product link: https://www.chipglobe.shop/p/esp32-wroom-32-modul-mit-bluetooth-und-wi-fi

Actuator Block (A)

MAX98357A digital-to-audio converter enabling direct speaker output for audio playback.

Storage Module

Micro-SD expansion board for SPI-based audio file storage.

Product link: https://www.chipglobe.shop/p/micro-sd-speicher-erweiterungsboard-fuer-d1-mini-tf-kartenmodul-mit-spi-mit-ohne-geloetete-pins

Advantages of the Carenuity System

All modules are fully compatible with the Carenuity ecosystem. Installation is completed within minutes through the Install-for-Free service. Firmware updates are provided over-the-air, and comprehensive documentation is included. The modules can be prepared free of charge, with an expected lead time of three to four weeks.

Design Options

A circular baseboard with a diameter of approximately six centimetres is available to host all building blocks. Square or rectangular layouts are also supported. Example enclosures produced via 3D printing are showcased on our Instagram channel:

https://www.instagram.com/solutions.carenuity/

Get Started

If you are interested in this modular ESP32 audio solution, please let us know your preferred form factor. We will prepare the complete module set for you and provide all required setup instructions.