Summary of ESP32-LyraT – An Open Source Development Board For Smart Audio Applications
The ESP32-LyraT is an open-source development board by Espressif Systems designed to enhance audio applications. It supports the ESP-ADF framework, enabling features like one-key Wi-Fi setup, voice wake-up, recognition, and cloud access. With comprehensive documentation, it accelerates the creation of smart speakers, wearable devices, and smart home systems. The board integrates dual-mode Bluetooth and Wi-Fi audio solutions and includes various components such as an audio codec, battery charger, and ESP32 WROVER module, making it a versatile platform for audio-focused development.
Parts used in the ESP32-LyraT:
- UART
- USB Power Port
- Battery charger chip
- Audio codec chip
- Built-in sound card
- PA (Power Amplifier) chip
- JTAG header
- UART header
- Function key
- Boot key
- Micro SD slot
- Green LED
- Red LED
- ESP32 WROVER Module
Espressif systems has been working on different audio applications including smart speakers. Despite the fact that they have been developing their audio applications, as of February 2018, none of ESP32 software development kits was easily accessible and the hardware kits were not able to take on any new tasks. So, there were no chances to improve or implement new things using the hardware kits. Therefore, it was not surprising when the company released ESP32-LyraT.
ESP32-LyraT is an open-source development board, supporting Espressif Systems’ ADF (ESP-ADF Audio Development Framework), one-key Wi-Fi configuration, a wake-up button, voice wake-up, voice recognition, cloud platform access, and an audio player.
The goal was to improve the audio applications of the kits being produced, and this was achieved through ESP32-LyraT, the only board released by Espressif Systems with adequate documentation. ESP32-LyraT has different voice commands and interactive voice functions; it allows the fast development of applications relating to consumer electronics, wearables, smart speakers, smart home applications and automation. The board facilitates the quick and easy development of dual-mode (Bluetooth + Wi-Fi) audio solutions.
The block diagram below presents main components of the ESP32-LyraT and interconnections between components.
Features of ESP32-LyraT include UART, USB Power Port, a battery charger chip, an audio codec chip; a sound card which is built in the motherboard for providing sound output. There is also a PA chip, a JTAG header, and UART header. Other parts include the two keys which are the function keys and the boot keys. ESP32-LyraT has a micro SD slot available, a green and a red LED and an ESP32 WROVER Module.
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