“Here is another update for the “ESP Spy Microphone” project which is ESP8266/NodeMCU and ESP32 WiFi microphone arduino source code, revision 1.5.
In this update I have increased the audio stream recorder sample rate to 240KHz for both of ESP8266 and ESP32 firmwares.
Also the new feature is the “Chain Network” which is a local network that the devices one by one are connected to the each other and can transfer the audio stream data to the “Web Application”.”