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00:33NodeMCU has ESP-12 based serial WiFi integrated on board to provide GPIO, PWM, ADC, I2C and 1-WIRE resources at your finger tips,
00:35This is a step-down module. The input voltage must be higher than the output voltage.
00:18Professional supplier of Electronic components
Integrated Circuit, Module for Arduino, Led , SMD Capacitor, Diode, Sensor, etc.
00:31Use voltage: DC5V 2: Quiescent current: less than 2mA
Level output: high 5V 4: Level output: bottom 0V
00:12esp8266 esp32 WiFi and ble development board