esp8266-wifi-mic.ino - Arduino IDE file for esp8266, nodemcu or wemos d1 mini conv.sh - file for converting raw audio in wav 16bit and send to Yandex SpeechKit Cloud and receiving text test16.wav - sample
The microphone(max4466) is connected to A0 in esp8266 esp8266 transmit raw audio to MQTT server. conv.sh converting audio and with yandex speechkit getting text.
Video: Youtube