M5Stack Atom Echo — RTSP Microphone for BirdNET-Go

A high-quality RTSP audio streaming server for the M5Stack Atom Echo, streaming live audio to BirdNET-Go or any RTSP-compatible client.

Buy: M5Stack Store | Amazon

Features

• Dual-core architecture — Core 1 handles full audio pipeline, Core 0 handles Web UI and RTSP negotiation
• mDNS discovery — atomecho.local, no IP needed
• Web UI — configure settings, view signal levels, logs, and diagnostics
• AGC — automatic gain control for varying bird distances
• High-pass filter — 2nd-order Butterworth (default 300Hz) removes wind/traffic
• Thermal protection — configurable auto-shutdown on overheating
• LED indicator — Off / Static / Level modes
• WiFiManager — captive portal for initial WiFi setup
• Persistent settings — saved to flash

Quick Start

1. Flash

pio run --target upload

2. Connect to WiFi

On first boot, connect to the ESP32-RTSP-Mic-AP access point and configure your WiFi. The LED turns blue when ready.

3. Stream

vlc rtsp://atomecho.local:8554/audio
# or
ffplay -rtsp_transport tcp rtsp://atomecho.local:8554/audio

BirdNET-Go: set audio source to rtsp://atomecho.local:8554/audio

Web UI: http://atomecho.local/

Recommended Settings

LED Status

Building

pio run                      # Build
pio run --target upload      # Flash
pio device monitor -b 115200 # Serial monitor

Dependencies

lib_deps =
    tzapu/WiFiManager @ ^2.0.17
    m5stack/M5Atom @ ^0.1.3
    fastled/FastLED @ ^3.10.3

Documentation

• Architecture & Troubleshooting Guide — dual-core design, audio tuning, troubleshooting, version history

Acknowledgments

This project is largely based on birdnetgo-esp32-rtsp-mic by @Sukecz — thank you for the excellent foundation!

• M5Stack for the Atom Echo hardware
• BirdNET-Go community