• Smart Speaker with ESP32-S3, MAX98357, INMP441, and NeoPixel Stick
  • Table of Contents
  • Introduction
  • Project Goals
  • Features
  • Components
  • Enclosure Design
  • Assembly Instructions

This project involves designing and building a 3D-printed smart speaker that integrates an ESP32-S3 DevKitC-1 WROOM-1 N16R8, a MAX98357 I2S amplifier, a Dayton Audio DMA45-4 speaker, an INMP441 I2S microphone, and an Adafruit NeoPixel Stick. The smart speaker is capable of playing audio, responding to voice commands, and providing visual feedback through RGB LEDs, making it a versatile addition to any IoT or home automation setup.

• Create a compact, aesthetically pleasing smart speaker that can be 3D-printed and assembled with readily available components.
• Integrate the ESP32-S3 to provide Wi-Fi and Bluetooth connectivity, enabling wireless control and OTA updates.
• Utilize the MAX98357 amplifier for high-quality audio output through the speaker.
• Incorporate the INMP441 microphone for voice recognition capabilities, including wake word detection and voice commands.
• Integrate the Adafruit NeoPixel Stick for dynamic visual feedback and enhanced user interaction.
• Optimize the enclosure for acoustic performance, considering factors such as enclosure volume and damping materials.
• Provide comprehensive documentation, including design files, wiring diagrams, and software configuration, to enable others to replicate and customize the project.

• Wireless Connectivity: Controlled via Wi-Fi or Bluetooth using the ESP32-S3.
• High-Quality Audio Output: Powered by the MAX98357 amplifier and the Dayton Audio DMA45-4 speaker.
• Voice Recognition: Captures voice commands using the INMP441 microphone.
• Dynamic Visual Feedback: Displays animations and status indicators using the NeoPixel Stick.
• Customizable Enclosure: 3D-printable design with considerations for acoustic optimization.
• Easy Assembly: Detailed instructions and diagrams provided for straightforward assembly.
• OTA Updates: Supports over-the-air firmware updates through ESPHome.

• ESP32-S3 DevKitC-1 WROOM-1 N16R8: Microcontroller with Wi-Fi and Bluetooth capabilities.
• MAX98357 Mono I2S Digital Audio Amplifier: Amplifier module for driving the speaker.
• Dayton Audio DMA45-4 Speaker: 1.5-inch, 4-ohm full-range speaker.
• INMP441 I2S Microphone Module: Digital microphone for voice input.
• Adafruit NeoPixel Stick - 8 x 5050 RGB LEDs: Addressable RGB LED strip for visual effects.
• Additional Materials:
  • Wires (various gauges)
  • Mounting hardware (screws, standoffs)
  • 3D-printed enclosure parts (design files included)
  • Optional logic level shifter (if needed for NeoPixel data line)

The enclosure is designed using OpenSCAD and optimized for:

• Component Placement: Dedicated mounting points for the ESP32-S3, amplifier, microphone, and NeoPixel Stick.
• Acoustic Performance: Sealed enclosure with appropriate internal volume and options for damping materials.
• Accessibility: Openings for the USB port, microphone, speaker grille, and visibility for the NeoPixel Stick.
• Wire Management: Channels and cutouts for neat routing of wires.
• Aesthetic Appeal: Integration of the NeoPixel Stick enhances visual feedback and user interaction.

1. Print the Enclosure Parts:
   • Use the provided STL files to 3D-print the enclosure components.
   • Recommended materials: PLA or PETG.
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