Attach the NodeMcu V3 CH340 Lua WIFI ESP8266-12E board to the leg expansion board. <br>NodeMCU Base Ver 1.0 for ESP8266 NodeMCU UART WIFI IoT, then connect the microphone to the pin expansion board. Use a 3-wire jumper with a leg that says Vcc. The 5V leg and the pin that says Gnd are attached to the Gnd pin and the leg is attached to the pin D8 (as shown in Figure 1).
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