ESP32 DEVKIT V1 Pinout Analysis

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Board Capabilities The DEVKIT V1 platform is equipped with a 30-pin interface powered by the ESP-WROOM-32 module. It features a high-performance Tensilica Xtensa LX6 dual-core 32-bit processor at its core.

1. Power Management (VIN, 3.3V, GND). ESP32 DEVKIT V1 Pinout

  • esp32 devkit v1 pinout

    • ESP32 DEVKIT V1 Pinout, Voltage Regulation

    • VIN: Accepts external power input between 5V and 10V, regulated via the AMS1117-3.3 chip.
    • 3.3V: Provides a stabilized output voltage directly from the onboard regulator for peripheral devices.
    • GND: Serves as the common reference point or ground for the electrical circuit.

    2. GPIO Functional Overview

    Digital I/O and General Purpose Pins Users can freely configure 12 specific GPIOs (16 through 33, excluding some) as either inputs or outputs without hardware conflicts. Note that a subset of pins, specifically GPIO 34, 35, 36, and 39, are dedicated input-only channels and lack internal pull-up resistor support.

    3. Boot States and Safety Warnings

    Startup State Requirements

    • Logic HIGH: Conversely, GPIOs 0, 5, 14, and 15 require a high logic level during initialization to ensure proper system startup.
    • Logic LOW: For a successful boot sequence, GPIOs 2, 4, 12, and 13 must be maintained at a low logic state.

    4. Analog and Communication Features (ADC, DAC, UART), ESP32 DEVKIT V1 Pinout

    Signal Processing & Modulation

    • ADC Channels: Integrated 12-bit converters provide a digital output range of 0 to 4095 for analog signals up to 3.3V.
    • PWM Modules: The chip supports 16 autonomous Pulse-Width Modulation channels for precise output control.
    • Touch Sensors: Built-in capacitive touch pins allow for seamless integration of touch-sensitive interfaces.

    5. ESP32 DEVKIT V1 Pinout

    GPIOInputOutputNotes
    0pulled upOKoutputs PWM signal at boot
    1TX pinOKdebug output at boot
    2OKOKconnected to on-board LED
    3OKRX pinHIGH at boot
    4OKOK 
    5OKOKoutputs PWM signal at boot
    6xxconnected to the integrated SPI flash
    7xxconnected to the integrated SPI flash
    8xxconnected to the integrated SPI flash
    9xxconnected to the integrated SPI flash
    10xxconnected to the integrated SPI flash
    11xxconnected to the integrated SPI flash
    12OKOKboot fail if pulled high
    13OKOK 
    14OKOKoutputs PWM signal at boot
    15OKOKoutputs PWM signal at boot
    16OKOK 
    17OKOK 
    18OKOK 
    19OKOK 
    21OKOK 
    22OKOK 
    23OKOK 
    25OKOK 
    26OKOK 
    27OKOK 
    32OKOK 
    33OKOK 
    34OK input only
    35OK input only
    36OK input only
    39OK input only

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