LED and Button

A0 has a single green LED for programmable status indication, and a single momentary pushbutton for resetting the processor.

LED

A0 has a single-color green LED. The LED is active HIGH - the processor needs to pull the pin HIGH to turn on the LED.

Button

A0 has a single momentary pushbutton on the upper PCB, press it to reset the ESP32

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Contents
LED
Button