Chapter 1. Get Started
Overview The ESP-LyraT-8311A is mainly designed for audio applications. However, you can use your creativity
to come up with any other use cases.
Fig. 34: ESP-LyraT-8311A - front (click to enlarge)
Description of Components The description of components starts from the top right corner and then goes clock-
wise.
Reserved means that the functionality is available, but the current version of the kit does not use it.
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 This board has six programmable buttons
Microphone Supports Electret and MEMS microphones; this extension board is supplied
with an electret microphone
Headphone Connector 6.3 mm (1/8”) stereo 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 Connec-
tor
(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
Espressif Systems 43
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Release v4.4
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