Hello everyone,
I’d like to introduce my new project: a smart home TTS/MP3 player, based on an ESP32 audio kit and fully integrated into your smart home system via MQTT.
The player provides the following features:
1. TTS (Text-to-Speech)
- Converts text to audio using Google TTS
- Immediate playback
- Ideal for home automation (e.g., “Washing machine finished”, “Motion detected”)
2. TTM (Text-to-Memory) with caching
Works like TTS, but the generated MP3 files are stored locally.
- If the same text is requested again, the cached file is played
- Reduces internet requests and makes playback extremely fast
3. MP3 Playback
- Plays any MP3 files from the SD card
- Custom sounds can be uploaded via FTP
4. Playback queue
Multiple speech requests are played one after another automatically.
- No overlap or audio glitches
- TTS text can include a prefix that overrides the volume, for example:
80! Water in the basement
This ensures that important alerts are played loudly, regardless of the player’s current volume settings.
5. MQTT control
- Fully controllable via MQTT
- Compatible with any smart home system that supports MQTT
- Commands include:
mp3,tts,ttm,volume,stop,reboot, and more - Each TTS player can subscribe to messages individually or as part of a group
6. Configuration
- Configurable via
app.inion the SD card - Easy setup of Wi-Fi, MQTT, FTP, volume, and more
- Room-based SD card configuration:
When moving the device, simply swap the SD card to carry all settings and files with you.
One possible use for the player is to turn it into a garden iDog that plays sounds or music whenever someone walks past
The entire project, including documentation, is open source and available here:
GitHub: GitHub - nmaciol/esp32-smarthome-mp3player-main
