M5StickC PLUS2 – Live Microphone Web Stream

Stream real-time microphone audio from an M5StickC PLUS2 over Wi-Fi and listen directly in a web browser.

The device runs a fully self-hosted system:

• HTTP web interface on port 80
• WebSocket audio stream on port 81
• Raw PCM 16-bit mono audio at 16 kHz
• No external server or cloud required

Built for Arduino IDE using M5Unified.

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✨ Features

• Uses the built-in SPM1423 microphone
• Low-latency live streaming over local Wi-Fi
• Works on phone, tablet, and desktop browsers
• Supports multiple listeners simultaneously
• Simple Start / Stop UI with gain control
• Runs entirely on the ESP32 inside M5StickC PLUS2

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🧰 Requirements

Hardware

• M5StickC PLUS2
• 2.4 GHz Wi-Fi network
• USB-C cable for programming

Software

• Arduino IDE
• M5Stack board package
• Arduino libraries:
  • M5Unified
  • WebSockets (by Markus Sattler / Links2004)

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⚙️ Installation

1. Install M5Stack Board Support

Open Arduino IDE → Preferences
Add this Board Manager URL: https://static-cdn.m5stack.com/resource/arduino/package_m5stack_index.json

Then:

• Open Boards Manager
• Install M5Stack
• Select board: M5StickCPlus2

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2. Install Required Libraries

Arduino IDE → Library Manager

Install: M5Unified WebSockets

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3. Configure Wi-Fi

Edit inside the sketch:

const char* WIFI_SSID = "YOUR_WIFI_NAME";
const char* WIFI_PASS = "YOUR_WIFI_PASSWORD";

🔒 Security Notice

This project:

• Has no authentication
• Uses unencrypted WebSocket audio
• Is intended for trusted private LAN use only
• Do not expose directly to the internet without adding security.