IoT Sound Level Monitor with ESP8266 & Sound Module
Amazon.com: Type-C ESP8266 ESP-12 ESP-12F NodeMcu Mini D1 Module WeMos Lua 4M Bytes WLAN WiFi Internet Development Board Base on ESP8266 ESP-12F for Arduino,Compatible with WeMos D1 Mini (10pcs Type-C) : Electronics
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IoT Sound Level Monitor with ESP8266 & Sound Module
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