Fantastic, it works!
Don't know why I wasn't able to find it first.

Thanks!

Hi all.

Just setup my first M5 echo! The product seems great so far, I tried the factory BT firmware and it works fine.

I want to test the Recoder&Replay example, but an error occurred after pressing the button:

Init i2s_set_pin
E (2137) I2S: i2s_check_set_mclk(253): ESP32 only support to set GPIO0/GPIO1/GPIO3 as mclk signal, error GPIO number:2133
E (2142) I2S: i2s_set_pin(314): mclk config failed

just after

err += i2s_set_pin(SPEAKER_I2S_NUMBER, &tx_pin_config);

where

#define SPEAKER_I2S_NUMBER I2S_NUM_0

I searched for some solution but I didn't find a good solution.

Using Visual Studio code, this is the platformio.ini

[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
upload_speed = 115200
lib_deps =
  m5stack/M5Atom @ ^0.0.9
  fastled/FastLED @ ^3.5.0

Thanks in advance!
Ferb