When uploading code to the ESP32, you should press the BOOT button, which is the same of held GPIO 0 to LOW. There are other pins that influence uploading code to the ESP32, such as GPIO2, GPIO12, and GPIO15.

The ESP32 chip features 34 physical GPIO pins (GPIO0 ~ GPIO19, GPIO21 ~ GPIO23, GPIO25 ~ GPIO27, and GPIO32 ~ GPIO39). Each pin can be used as a general-purpose I/O, or be connected to an internal peripheral signal.

Although the ESP32 has 48 GPIO pins in total, only 25 of them are broken out to the pin headers on both sides of the development board. These pins can be assigned a variety of peripheral duties, including: Thanks to the ESP32’s pin multiplexing feature, which allows multiple peripherals to share a single GPIO pin.

Configure GPIO’s Mode,pull-up,PullDown,IntrType. Reset an gpio to default state (select gpio function, enable pullup and disable input and output). This function also configures the IOMUX for this pin to the GPIO function, and disconnects any other peripheral output configured via GPIO Matrix. Always return ESP_OK. gpio_num: GPIO number.

Jan 19, 2022 · Here is our easy-to-use ESP32 GPIO pin selector table. Moreover, it has all the listed GPIO pins exposed in most of the ESP32 development boards out there. This table represents all available GPIO pins suitable for output or input pins.

Mar 21, 2023 · Find all the relevant information about the ESP32 pinout on a single page to use these GPIO pins for your DIY electronics project correctly. Even though there are many variations of ESP32 boards, the function of the pins remains the same. However, some pins may not be available, depending on your model.

Input Only Pins (GPIO 34-39): Lack internal pull-up/pull-down resistors and cannot be configured as outputs. RTC GPIOs: Can wake the ESP32 from deep sleep and be controlled by the ULP co-processor. PWM: Any 'Yes' I/O pin can generally be used for PWM output (via LEDC peripheral).

Apr 25, 2023 · I‘m always using the native USB pins w/ multiplexed UART+JTAG. Can I then repurpose the GPIOs 20 and 21? Also: How does the bootloader know which output to send the debug logs to? Or do they always. appear on both the devel board UART and the native one? If so, can I change this? Re: ESP32-C3: GPIO 20/21 useable?

May 16, 2024 · Esp32 chip has 48 pins with multiple functions. Not all the ESP32 development boards have all the pins exposed, and there are some unusable pins. There are many questions about how to use ESP32 GPIO pins. What GPIO pins should we use? Which GPIO pins should we need to avoid?

There are many questions on how to use the ESP32 GPIOs. What pins should you use? What pins should you avoid using in your projects? This post aims to be a simple and easy to follow reference guide for the ESP32 GPIOs. The figure below illustrates the ESP-WROOM-32 pinout.