> ## Documentation Index
> Fetch the complete documentation index at: https://docs.deneyapkart.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Pin Definitions (DYMv2)

## Power Pins

* **5V →** Directly connected to the USB input port. It provides the voltage (5V) and current capability of the connected USB power source. A power source between 500 mA and 1000 mA is recommended. It can be used to power externally connected units.
* **3V3 →** Provides a 3.3V voltage and up to 1A current output via a DC-DC step-down converter. It can be used to power externally connected units.
* **EN →** This pin must be held at **logic “1” (3.3V)** to enable the operation of the ESP32-S2 microcontroller. This condition is ensured by an internally placed pull-up resistor. The **“RES”** button is connected to this pin and is used to reset the system. When the button is pressed, the **EN** pin is pulled to **logic “0” (0V)**.
* **GND →** Common ground line of the circuit for all power and logic connection pins.

## Logic Pins (Input/Output Pins)

* **D0 – D12 →** Used as digital input/output pins. **Logic “0” corresponds to 0V, and logic “1” corresponds to 3.3V**. All of these pins can be used as PWM pins. The pins are **not 5V tolerant**.

## Analog Pins

* **A0 – A6 →** Used as input pins for analog signals in the range of 0V – 3.3V. All of these pins can also be used as digital input/output pins.
* **DA0 – DA1 →** Used to provide analog signal output in the range of 0V – 3.3V. They can also be used as digital input/output pins. They are connected to **D12 (DA0)** and **D11 (DA1)** respectively.

## Communication Pins

* **TX – RX →** Serial communication (UART) pins. Firmware uploading and terminal communication are carried out through these pins. **TX** is the output pin and **RX** is the input pin. Besides UART communication, they can also be used as digital input/output pins. They are also referred to as **D1 (TX)** and **D0 (RX)**.
* **I2C →** Sensors or actuators can be controlled via the **SDA** and **SCL** pins. **SDA** is the bidirectional data line, and **SCL** is the output clock (timing) line. These pins are held at **logic “1” (3.3V)** level with 10K pull-up resistors. In addition to I2C communication, they can also be used as digital input/output pins. They are connected to **D8 (SDA)** and **D7 (SCL)**.
* **SPI →** Sensors or actuators can be controlled via the **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 slave select pin. These pins can also be used as digital input/output pins. They are also referred to as **SS (D10), SCLK (D6), MISO (D5),** and **MOSI (D4)**.

## PWM Pins

* **PWM → PWM0** and **PWM1** are pulse-width modulation (PWM) square wave output pins. They are also connected to **D2** and **D3** pins and can be used as digital input/output pins.
* All digital input/output pins **(D0–D12)** can be used as PWM pins.

## Capacitive Touch Sensor Pins

* **T0 – T6 →** Input pins used for capacitive touch sensing. They are connected respectively to **T0 (A0), T1 (A1), T2 (A2), T3 (A3), T4 (A4), T5 (A5),** and **T6 (A6)** pins, and can also be used as digital input/output pins.

## RGB Pin

* **RGBLED →** The pin to which the onboard addressable RGB LED is connected. It is not exposed externally through pins. It is also referred to as **D14**.

## Button Pin

* **GPKEY →** The pin connected to the onboard general-purpose button. It is also used to place the system into manual boot (upload) mode. It is held at **logic “1” (3.3V)** level with a 10K pull-up resistor. It is also connected to **D13** and can be used as a digital input/output pin.

## Programming Pins

* **EN →** This pin must be held at **logic “1” (3.3V)** to enable the operation of the ESP32-S2 microcontroller. This condition is ensured by an internal pull-up resistor. The **“RES”** button is connected to this pin and is used to reset the system. When the button is pressed, the **EN** pin is pulled to **logic “0” (0V)**.
* **BOOT →** Used to place the system into manual boot (upload) mode. It is the pin connected to the onboard general-purpose button (BUT). It is held at **logic “1” (3.3V)** level with a 10K pull-up resistor. It is also connected to **D13**.