Once you got a FET, there’s a few ways to put it into a circuit. If you’re switching a 3.3 V power rail and your microcontroller is 3.3 V, you might as well drive the FET directly with a GPIO ...

At its core, the ESP32 chip is not much more than an integrated circuit, a huge mass of transistors ... type for easy access to things like USB and GPIO. But these tiny chips need little in ...

The library has a GPIO and an ODIO. The GPIO cell set can be configured as input or output and has an internal 50Kohm pull-up or pull-down resistor. Cells for I/O and core power and ground with ...