4. Applications
4. Applications
4.1 ESP32 Smart Audio Platform
4.1.1 ESP32-LyraT Audio Development Board
ESP32-LyraT is an open-source development board for Espressif Systems’ Audio Development Framework, ESP-ADF.
It is designed for smart speakers and smart-home applications. The dev board consists of the ESP32-WROVER/ESP32-
WROVER-B module, a Micro SD card, expansion interfaces, touch buttons and several function keys. It facilitates
the quick and easy development of dual-mode (Bluetooth + Wi-Fi) audio solutions , also supporting one-key
Wi-Fi configuration, a wake-up button, voice wake-up, voice recognition, cloud platform access, and an audio
player.
The ESP32-LyraT smart audio board has the following features:
• Various mainstream, both lossy and lossless, compressed audio formats, including M4A, AAC, FLAC, OGG,
OPUS, MP3, etc.
• One-key configuration and wake-up from the standby mode.
• SoftAP and Station mode.
• Various wireless protocols�Wi-Fi 802.11b/g/n, Classic BT and BLE.
• A series of audio inputs, including Wi-Fi, BT-audio, DLNA, Line-in, etc.
• BLE network configuration, and smart network configuration with apps, such as WeChat.
• Two microphones for the development of near-field and far-field voice recognition applications.
• Peripherals for differentiated demands.
Figure 24 and 25 show the top view and bottom view of ESP32-LyraT.
Figure 24: Top View of ESP32-LyraT
Espressif Systems 20 ESP32 Hardware Design Guidelines V2.7
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