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59 lines
1.5 KiB
Markdown
59 lines
1.5 KiB
Markdown
# esp32-rx
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This is a sample project for receiving audio data using [ESP32](https://www.espressif.com/en/products/socs/esp32) microcontroller.
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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.
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The program also support input from I2S MEMS microphones that does not require the usage of the ADC.
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The received messages are optionally displayed on the attached OLED display.
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## Setup
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- NodeMCU-ESP32
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- OLED SSD1306
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- Microphone, tested with the following, but others could be also supported:
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- Analog:
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- MAX9814
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- KY-037
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- KY-038
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- WS Sound sensor
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- I2S MEMS:
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- SPH0645
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## Pinout
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### Analog Microphone
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| MCU | Mic |
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| ------- | --------- |
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| GND | GND |
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| 3.3V | VCC / VDD |
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| GPIO 35 | Out |
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### Digital (I2S) Microphone
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| MCU | Mic |
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| ------- | ----------- |
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| GND | GND |
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| 3.3V | VCC / VDD |
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| GPIO 26 | BCLK |
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| GPIO 33 | Data / DOUT |
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| GPIO 25 | LRCL |
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### I2C Display (optional)
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| MCU | Display |
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| ------- | ----------- |
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| GND | GND |
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| 3.3V | VCC / VDD |
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| GPIO 21 | SDA |
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| GPIO 22 | SCL |
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## Demo
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https://user-images.githubusercontent.com/1991296/177211906-2102e9fa-8203-4b80-82e6-4839bf66f01f.mp4
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[Watch high quality on Youtube](https://youtu.be/38JoMwdpH6I)
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