This user guide provides information on the ESP-LyraT-8311A extension board. This board cannot be bought separately and is usually sold together with other Espressif development boards (e.g., ESP32-S2-Kaluga-1), which will be referred to as *main boards* below.
The ESP-LyraT-8311A extends the functionality of your main board by adding sound processing functionality:
- Audio playback/recording
- Processing of audio signals
- Programmable buttons for easy control
This extension board can be used in many ways. The applications might include voice user interface, voice control, voice authorization, recording and playback of sound, etc.
The description of components starts from the top right corner and then goes clockwise.
**Reserved** means that the functionality is available, but the current version of the kit does not use it.
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* - Key Component
- Description
* - Extension Header
- Male Extension Header on the flip side is for mounting onto main board's Extension Header; Female Extension Header is for mounting other boards that have a Male Extension Header
* - Function Button
- Programmable button
* - Microphone
- Supports Electret and MEMS microphones; this extension board is supplied with an electret microphone
* - Headphone Connector
- 1/8" headphone connector
* - Speaker Connector
- Connect an external speaker to the 2-pin connector
* - PA
- 3 W Audio signal amplifier for the external speaker
* - External Mic-Matrix Connector
- (Reserved) FPC connector for external Mic-Matrix (microphone boards)
* - ADC
- (Reserved) high-performance ADC/ES7243: 1 channel for microphone, 1 channel for acoustic echo cancellation (AEC) function
* - Mono Audio Codec
- ES8311 audio ADC and DAC; it can convert the analog signal picked up by the microphone or convert digital signal to play it back through a speaker or headphones
Start Application Development
-----------------------------
Before powering up your ESP-LyraT-8311A, please make sure that it is in good condition with no obvious signs of damage.
Required Hardware
^^^^^^^^^^^^^^^^^
- Board with a female Extension Header (e.g., ESP32-S2-Kaluga-1)
- ESP-LyraT-8311A extension board
- Four mounting bolts (for stable mounting)
- Computer running Windows, Linux, or macOS
Hardware Setup
^^^^^^^^^^^^^^
To mount your ESP-LyraT-8311A onto the board with a female Extension Header:
1. Install the four mounting bolts onto the board with a female Extension Header
2. Align the ESP-LyraT-8311A with the bolts and Extension Header and insert it carefully
*`ESP-ADF Getting Started Guide <https://docs.espressif.com/projects/esp-adf/en/latest/get-started/index.html#about-esp-adf>`_ if you develop with ESP-ADF (Espressif Audio Development Framework).
* Section :ref:`user-guide-esp32-s2-kaluga-1-kit-software-setup` of the ESP32-S2-Kaluga-1 kit user guide if you develop directly with ESP-IDF (Espressif IOT Development Framework).
