leonhard.suckau/loudnessspy
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loudnessspy project for audio calculating RMS, and publishing to MQTT.
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audioprog 958eb59537 Add README and rc.local for LoudnessSpy setup and configuration
2025-08-29 21:41:29 +02:00
.vscode Initial commit for loudnessspy project with audio recording and MQTT integration. Added Cargo.toml for dependencies, workspace configuration, and main application logic for capturing audio input, calculating RMS, and publishing to MQTT. 2025-08-29 21:17:51 +02:00
src Initial commit for loudnessspy project with audio recording and MQTT integration. Added Cargo.toml for dependencies, workspace configuration, and main application logic for capturing audio input, calculating RMS, and publishing to MQTT. 2025-08-29 21:17:51 +02:00
.gitignore Initial commit for loudnessspy project with audio recording and MQTT integration. Added Cargo.toml for dependencies, workspace configuration, and main application logic for capturing audio input, calculating RMS, and publishing to MQTT. 2025-08-29 21:17:51 +02:00
Cargo.toml Initial commit for loudnessspy project with audio recording and MQTT integration. Added Cargo.toml for dependencies, workspace configuration, and main application logic for capturing audio input, calculating RMS, and publishing to MQTT. 2025-08-29 21:17:51 +02:00
loudnessspy.code-workspace Initial commit for loudnessspy project with audio recording and MQTT integration. Added Cargo.toml for dependencies, workspace configuration, and main application logic for capturing audio input, calculating RMS, and publishing to MQTT. 2025-08-29 21:17:51 +02:00
rc.local Add README and rc.local for LoudnessSpy setup and configuration 2025-08-29 21:41:29 +02:00
Readme.md Add README and rc.local for LoudnessSpy setup and configuration 2025-08-29 21:41:29 +02:00

Readme.md

loudnessspy

Ein Rust-Programm für den Raspberry Pi, das kontinuierlich die Lautstärke (RMS) des ersten verfügbaren Mikrofons misst und alle 2 Sekunden per MQTT an einen Server sendet.

Features

  • Durchgehende Aufnahme des ersten (USB-)Mikrofons
  • Alle 2 Sekunden Berechnung der mittleren Lautstärke (RMS)
  • Versand der Werte als JSON per MQTT (mit Username/Passwort)
  • Robuster Betrieb: Reconnect bei Netzwerkproblemen, Timeout beim Senden

Konfiguration

Die Datei config.toml im Projektverzeichnis steuert die Verbindung:

host = "localhost"
port = 1883
username = "user"
password = "pass"
client_id = "loudnessspy"
topic = "loudnesspy/volume"

Kompilieren für Raspberry Pi 1 (32 Bit)

  1. Rust-Target installieren: 
    rustup target add arm-unknown-linux-gnueabihf
  2. Cross-Compiler und ARM-ALSA-Entwicklerdateien installieren: 
    sudo apt-get install gcc-arm-linux-gnueabihf libasound2-dev:armhf pkg-config-arm-linux-gnueabihf
  3. Umgebungsvariablen setzen: 
    export PKG_CONFIG_SYSROOT_DIR=/usr/arm-linux-gnueabihf
export PKG_CONFIG_PATH=/usr/lib/arm-linux-gnueabihf/pkgconfig
export PKG_CONFIG=arm-linux-gnueabihf-pkg-config
  4. Bauen: 
    cargo build --release --target=arm-unknown-linux-gnueabihf

MQTT-Format

Alle 2 Sekunden wird ein JSON wie folgt gesendet:

{"rms":0.0123}

Hinweise

  • Das Programm sucht bevorzugt nach USB-Mikrofonen, nutzt sonst das Standardgerät.
  • Bei fehlender Verbindung wird automatisch reconnectet.
  • Fehler beim Senden werden geloggt, blockieren aber nicht den Hauptloop.

rc.local script to start LoudnessSpy on boot

Autor: Leonhard Suckau Lizenz: AGPL