Libraries
Library gpio
To use this library in your code:
import gpioSupport for General Purpose Input/Output (GPIO) pins.
The VirtualPin is a software pin which can be used for actual pins that have different modes depending on whether they are used for input or output or peripherals simulated in software.
ESP32
The ESP32 has 34 physical pins (0-19, 21-23, 25-27, and 32-39). Each pin can be used as a general-purpose pin, or be connected to a peripheral.
Pins 0, 2, 5, 12 and 15 are strapping pins.
Pins 6-11 are normally connected to flash/PSRAM, and should not be used.
Pins 12-15 are JTAG pins, and should not be used if JTAG support is needed.
Pins 25-26 are DAC pins.
Pins 34-39 are input only.
Pins 32-39 are ADC pins of channel 1.
Pins 0, 2, 4, 12-15, 25-27 are ADC pins of channel 2. ADC channel 2 has restrictions and should be avoided if possible.
Pins 0, 2, 4, 12-16, 25-39 are RTC pins. They can be used in deep sleep. For example, to wake up from deep sleep.
ESP32C3
The ESP32C3 has 22 physical pins (0-21). Each pin can be used as a general-purpose pin, or be connected to a peripheral.
Pins 2, 8, and 9 are strapping pins.
Pins 12-17 are normally connected to flash/PSRAM, and should not be used.
Pins 18-19 are JTAG pins, and should not be used if JTAG support is needed.
Pins 0-5 are RTC pins and can be used in deep-sleep.
Pins 0-4 are ADC pins of channel 1.
Pin 5 is an ADC pin of channel 2. However, the controller of ADC channel 2 may enter an inoperative state and was therefore disabled by Espressif. An errata was published.
ESP23C6
The ESP32C6 has 31 physical pins (0-30). Each pin can be used as a general-purpose pin, or be connected to a peripheral.
Pins 4, 5, 8, 9, and 15 are strapping pins.
Pins 24-30 are normally connected to flash/PSRAM, and should not be used.
Pins 10-11 are not led out to any chip pins.
Pins 12-13 are JTAG pins, and should not be used if JTAG support is needed.
Pins 0-6 are ADC pins of channel 1.
Pins 0-7 are RTC pins and can be used in deep-sleep.
For chip variants without an in-package flash, GPIO14 is not led out to any chip pins.
ESP32P4
The ESP32P4 has 55 physical pins (0-54). Each pin can be used as a general-purpose pin, or be connected to a peripheral.
Pins 34-38 are strapping pins.
Pins 24-25 are JTAG pins, and should not be used if JTAG support is needed.
Pins 16-23, 49-54 are ADC pins of channel 1.
Pins 51-54 are analog comparator pins.
Pins 0-15 are RTC pins and can be used in deep-sleep.
Pins 2-15 can be used as touch sensor pins.
ESP32S2
The ESP32S2 has 43 physical pins (0-21, 26-46). Each pin can be used as a general-purpose pin, or be connected to a peripheral.
Pins 0, 45, and 46 are strapping pins.
Pins 26-32 are normally connected to flash/PSRAM, and should not be used.
Pins 39-42 are JTAG pins, and should not be used if JTAG support is needed.
Pins 1-10 are ADC pins of channel 1.
Pins 11-20 are ADC pins of channel 2. ADC channel 2 has restrictions and should be avoided if possible.
Pins 0-21 are RTC pins and can be used in deep-sleep.
Pin 46 is fixed to pull-down and is input only.
ESP32S3
The ESP32S3 has 45 physical pins (0-21, 26-48). Each pin can be used as a general-purpose pin, or be connected to a peripheral.
Pins 0, 3, 45, and 46 are strapping pins.
Pins 26-32 are normally connected to flash/PSRAM, and should not be used.
Pins 33-37 are used when using octal flash or PSRAM. They may be available depending on the configuration, but are considered restricted.
Pins 19-20 are JTAG pins, and should not be used if JTAG support is needed.
Pins 1-10 are ADC pins of channel 1.
Pins 11-20 are ADC pins of channel 2. ADC channel 2 has restrictions and should be avoided if possible.
Pins 0-21 are RTC pins and can be used in deep-sleep.
Interfaces
A General Purpose Input/Output (GPIO) pin.
Classes
A GPIO chip on Linux.
A pin that does the opposite of the physical pin that it takes in the constructor.
A base class for pins.
Virtual pin.