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arduino-audio-tools/examples/examples-webserver/streams-i2s-webserver_wav
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Phil Schatzmann 2401171af5 I2S-webserver
2022-03-04 10:37:14 +01:00
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README.md move webserver examples to separate directory 2021-10-19 20:07:57 +02:00
streams-i2s-webserver_wav.ino I2S-webserver 2022-03-04 10:37:14 +01:00

README.md

I2S to Webserver

This sketch reads sound data from I2S. The result is provided as WAV stream which can be listened to in a Web Browser

INMP441

The INMP441 is a high-performance, low power, digital-output, omnidirectional MEMS microphone with a bottom port. The complete INMP441 solution consists of a MEMS sensor, signal conditioning, an analog-to-digital converter, anti-aliasing filters, power management, and an industry-standard 24-bit I²S interface. The I²S interface allows the INMP441 to connect directly to digital processors, such as DSPs and microcontrollers, without the need for an audio codec in the system.

Pins

INMP441 ESP32
VDD 3.3
GND GND
SD IN (GPIO32)
L/R GND
WS WS (GPIO15)
SCK BCK (GPIO14)
  • SCK: Serial data clock for I²S interface
  • WS: Select serial data words for the I²S interface
  • L/R: Left / right channel selection When set to low, the microphone emits signals on the left channel of the I²S frame. When the high level is set, the microphone will send signals on the right channel.
  • ExSD: Serial data output of the I²S interface
  • VCC: input power 1.8V to 3.3V
  • GND: Power groundHigh PSR: -75 dBFS.