Overview:  Hardware Characteristics: ESP32-LyraT is an open-source development board for Espressif Systems’ Audio Development Framework (ADF). It is designed for smart speakers and smart-home applications. The dev board consists of the ESP32-WROVER module, a Micro SD card, expansion interfaces, touch buttons and several function keys.  Wide Applicability: With a great variety of voice commands, interactive voice functions and a rich peripheral set, ESP32-LyraT allows the fast development of applications relating to consumer electronics, wearables, smart home and industrial automation.  Excellent Performance: 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.    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.  Support 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.    Applications:  Interactive voice functions.  Consumer electronics.  Consumer wearables.  Smart home .  Industrial automatio.    Package includes:  1 x ESP32-LyraT Development Board.    1. ESP32-WROVER Module: ESP32-WROVER is a powerful, general-purpose Wi-Fi+BT+BLE MCU module thattargets a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding. For more information, please refer to the User Manual.  2. Micro SD Card: Supports SPI,1-bit and 4-bit modes.  3. Audio Output AUX_IN: Works as the input to the ES8388 codec.  4. USB-UART Interface and USB Power Supply Interface: USB-UART Interface: the integrated CP2102N-A01-GQFN28 chip is used to convert USB to UART and supports a baud rate of up to 3 Mbit/s. USB Power Supply Interface: the working current of the Wi-Fi module is very high at peak times. Therefore, a power supply with a capacity of more than 500 mA is recommended 5. Touch Buttons: Four touch buttons are available on the development board: Play, Set, Vol+ and Vol–. Used as keys for audio functions, they bring such advantages as reduced BOM cost and design flexibility.  6. Speaker Interfaces: Supports two external speakers.