This is a sample project for receiving audio data using ESP32 microcontroller. The chip has a built-in 12-bit ADC which is used to process the analog audio from the external microphone module in real-time. The received messages are displayed on the attached OLED display

Setup

NodeMCU-ESP32
OLED SSD1306
MAX9814 (also works with KY-037, KY-038 and WS Sound sensor)

Demo

https://user-images.githubusercontent.com/1991296/177211906-2102e9fa-8203-4b80-82e6-4839bf66f01f.mp4

Watch high quality on Youtube