Skip to main content

​
Power Pins

  • 5V –> Provides 5V voltage and 0.5A current output capacity via a DC-DC step-up converter. It provides output when either power input (USB or Li-Po battery) is connected. It can be used to power external units.
  • 3V3 –> Provides 3.3V voltage and 1A current output capacity via a DC-DC step-down converter. It provides output when either power input (USB or Li-Po battery) is connected. It can be used to power external units.
  • VBAT –> Outputs the voltage of the externally connected Li-Po battery (3.3V – 4.2V). It can be used to power external units.
  • GND –> The common ground line of the circuit for all power and logic connection pins.

​
Logic Pins (Input/Output Pins)

  • D0 – D15 –> Used as digital input-output pins. Logic “0” corresponds to 0V; logic “1” corresponds to 3.3V.
  • A0(D23), A1(D22), A2(D21), A3(D20), A4(D19), A5(D18), A6(D17), A7(D16) pins can also be used as digital input-output pins.
  • All of these pins can be used as PWM pins due to the ESP32-S3 architecture.
  • Pins are not 5V tolerant. (Voltages above 3.3V should not be applied).

​
Analog Pins

  • A0 – A7 –> Used as input pins for analog signals (ADC) in the 0V – 3.3V range. All of these pins can also be used as digital input/output pins.
  • D15(A8), D14(A9), D13(A10), D12(A11), D1(A12), D0(A13) pins can also be used as analog input pins.

​
Communication Pins

  • TX – RX –> Serial communication (UART) pins. Firmware uploading and terminal communication are provided via these pins. TX is the output; RX is the input pin. They can also be used as digital input-output pins besides UART communication. They are also named as D2(TX) and D3(RX).
  • I2C –> Any sensor or actuator can be controlled via SDA and SCL pins. SDA (both input and output) is the data line; SCL (output) is the clock synchronization pin. These pins are held at the logic “1” (3.3V) level with 10K pull-up resistors. They can also be used as digital input-output pins besides I2C communication. They are also connected to D10(SDA) and D11(SCL) pins.
  • SPI –> Any sensor or actuator can be controlled via MOSI, MISO, SCLK, and SS pins. MOSI (output) is the data pin, MISO (input) is the data pin, SCLK (output) is the clock synchronization pin, and SS is the passive device selection pin. These pins can also be used as digital input-output pins. They are also named as SS (D4), SCLK (D5), MISO (D6), and MOSI (D7).

​
PWM Pins

  • Thanks to the ESP32-S3 architecture, almost all general-purpose input/output (GPIO) pins can be used as Pulse Width Modulation (PWM) outputs. You can assign any data pin as PWM for operations like motor drivers, LED brightness, etc.

​
Camera Pins

Dedicated data and synchronization pins for the camera module:
  • CAMD2 - CAMD9 –> Pins where image data (pixel) is transferred. Connected to D5, D1, D0, D4, D6, D8, A6(D17), and A4(D19) pins respectively.
  • CAMSD – CAMSC –> Camera I2C control pins. CAMSD (A0/D23) is data, CAMSC (A1/D22) is the clock pin.
  • CAMV –> Image ready (VSYNC) indicator. Connected to the A2(D21) pin.
  • CAMH –> Horizontal reference (HREF) indicator. Connected to the A3(D20) pin.
  • CAMXC –> Camera main clock signal input (XCLK). Connected to the A5(D18) pin.
  • CAMPC –> Pixel clock signal output (PCLK). Connected to the D7 pin.

​
Capacitive Touch Pins

  • T0 – T10 –> Input pins used for touch (capacitive) sensing.
  • Connected to T0(A0), T1(A1), T2(A2), T3(A3), T4(D15), T5(D14), T6(D13), T7(D12), T8(D1), T9(D0), and T10(BAT) pins respectively.

​
RGB Pin

  • RGBLED –> The pin to which the onboard addressable RGB LED is connected. It is internally connected to the D24 (GPIO46) pin on the board.

​
Button Pin

  • GPKEY –> The pin to which the general-purpose onboard button (BUT) is connected. It is also used to put the system into manual boot mode (BOOT). It is internally connected to the D25 (GPIO0) pin on the board.

​
SD Card Pins

  • Pins reserved within the board to communicate with the onboard Micro SD card reader:
    • SDCM –> D27 (GPIO12)
    • SDCK –> D28 (GPIO13)
    • SDDA –> D29 (GPIO14)
⚠️ Important: External connections cannot be made from the outside to these three pins (D27, D28, D29) reserved for the SD card.

​
Programming Pins

  • EN –> To allow the ESP32-S3-WROOM-1 processor module to operate, this pin must be held at a logic “1” (3.3V) level. The “RESET” button is connected to this pin and is used to reset the system.
  • BOOT –> Used to put the system into programming/boot mode. This operation is performed with the onboard “BUTTON” via the GPKEY (D25 / GPIO0) pin.

​
Battery Voltage Measurement Pin

  • BAT –> Used to measure the voltage value of a battery connected to the Li-Po battery connector or the VBAT pin analogically. It is connected to the D26 (GPIO3 / A14 / T10) pin on the board.