esp8226 wiring for INMP441

[PointlessOtter]

Hi,
I am not understanding how could I use my esp8226 with INMP441 to stream audio. I did found the wiring diagram for esp32 (https://github.com/pschatzmann/arduino-audio-tools/tree/main/examples/examples-webserver/streams-i2s-webserver_wav) but I am struggling on how to wire up esp8226 correctly.
Can you please pin-point me in the right direction to figure this out? Thanks!

[pschatzmann]

I am confused. I never heard of an esp8226 ?

[PointlessOtter]

Sorry, mistyped :/ - ESP8266

[pschatzmann]

The ESP8266 pins for I2S are:
Data bits (SD) = GPIO3/RX0
Data bit-clock (SCK) = GPIO15
Word select (WS) = GPIO2/TX1

I have never tested this however...

[PointlessOtter]

Ah, too bad. Good news, that did already order an ESP32 👍
Still, tried with your suggestion and hooked up ESP8266 to INMP441:

INMP441	ESP8266
(SD)	GPIO3/RX0
(SCK)	GPIO15
(WS)	GPIO2/TX1
(L/R)	GND
(VDD)	3V
(GND)	GND

Tried running the stream-i2s-serial but got an an error :/

[pschatzmann]

These options are only supported by the ESP32.
Therefore you need to omit time in you sketch...

[PointlessOtter]

Thanks, omitted the two settings and was able to upload the sketch.

    //cfg.use_apll = false;  // try with yes
    //cfg.pin_mck = 3; 

Unfortunately no success in reading the INMP441

Do I by any chance actually need to define at top which pins are for what?

[pschatzmann]

I found the following in the Arduino source code:
// IOs used for I2S. Not defined in i2s.h, unfortunately.
// Note these are internal GPIO numbers and not pins on an
// Arduino board. Users need to verify their particular wiring.
#define I2SO_DATA 3
#define I2SO_BCK 15
#define I2SO_WS 2
#define I2SI_DATA 12
#define I2SI_BCK 13
#define I2SI_WS 14

I suggest that you try the I pins for input and the O for output

[PointlessOtter]

Tried connecting like this but unfortunately with no success :(

INMP441	ESP8266
(SD)	GPIO12
(SCK)	GPIO15
(WS)	GPIO2
(L/R)	GND
(VDD)	3V
(GND)	GND

[pschatzmann]

sck should be 13!

[PointlessOtter]

Unfortunately have no success :( Anyway, much appreciate your time and help - will get my ESP32 and should be much straightforward! :)