> ## 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 (DYDK) ## Power Pins * **5V →** Provides a 5 V voltage and 0.5 A current output capacity via a DC-DC step-up converter. Output is available when either power input (USB or Li-Po battery) is connected. Can be used to power external modules. * **3V3 →** Provides a 3.3 V voltage and 1 A current output capacity via a DC-DC step-down converter. Output is available when either power input (USB or Li-Po battery) is connected. Can be used to power external modules. * **VBAT →** Outputs the voltage (3.3 V – 4.2 V) of the externally connected Li-Po battery. Can be used to power external modules. * **EN →** This pin must be held at **logic “1” (3.3 V)** to enable operation of the ESP32-WROVER-E module. 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” (0 V)**. * **GND →** 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 0 V; logic “1” corresponds to 3.3 V.** All of these pins can be used as PWM pins. The pins are **not** 5 V tolerant. * **D8, D9, D10, D11, D12, D13, D14,** and **D15** pins can also be used as analog input pins and capacitive sensing pins. ## Analog Pins * **A0 – A5 →** Used as input pins for analog signals in the range of 0 V – 3.3 V. **A0 – A3** pins are used only as input pins, while **A4** and **A5** pins can also be used as digital input/output pins. * **DAC1 – DAC2 →** Used to provide analog signal output in the range of **0 V – 3.3 V**. These pins can also be used as digital input, digital output, analog input, and PWM pins. ## Communication Pins * **TX – RX →** Serial communication (UART) pins. Firmware upload and terminal communication are performed 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 **D2 (TX)** and **D3 (RX)**. * **I2C →** Any sensor or actuator can be controlled via the **SDA** and **SCL** pins. **SDA (input/output)** is the data line, and **SCL (output)** is the clock synchronization pin. These pins are held at **logic “1” (3.3 V)** by 10 kΩ pull-up resistors. Besides I2C communication, they can also be used as digital input/output pins. They are also connected to **D10 (SDA)** and **D11 (SCL)** pins. * **SPI →** Any sensor or actuator 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 (D4), SCLK (D5), MISO (D6),** and **MOSI (D7)**. ## PWM Pins * **PWM0 – PWM1 →** Pulse-width modulation (PWM) square-wave output pins. They are also connected to **D0** and **D1** pins and can be used as digital input/output pins. * All pins between **D0 – D15**, as well as **A4, A5, DAC1,** and **DAC2**, can also be used as PWM pins. ## Camera Pins * **CAMD2 – CAMD9 →** Pins through which image data (pixels) are transmitted; used as outputs. They are also connected respectively to **D5, D1, D0, D4, D6, DAC2, A3,** and **A2** pins. * **CAMSD – CAMSC →** Serial communication pins; **CAMSD** is used for bidirectional data transfer, while **CAMSC** is used as the clock synchronization input pin. They are also connected to **A5 (CAMSD)** and **DAC1 (CAMSC)** pins. * **CAMXC →** The main clock signal source required for the operation of the camera sensor. Used as an input. It is also connected to the **A4** pin and can be used as a digital input/output pin. * **CAMPC →** The clock signal derived from the camera sensor for image data. Used as an output. It is also connected to the **D7** pin and can be used as a digital input/output pin. * **CAMV →** Output pin that indicates the image frame is ready. It is also connected to the **A0** pin and can be used only as a digital input. * **CAMH →** Output pin that indicates the image pixel is ready. It is also connected to the **A1** pin and can be used only as a digital input. ## Internal Sensor Pins * **6-Axis Inertial Measurement Unit (IMU) →** Includes **IMUSD** and **IMUSC** pins. **IMUSD** is used for bidirectional data transfer, while **IMUSC** is used as the clock synchronization input pin. These pins are also connected to the common **SDA** and **SCL** lines. The I2C address is **0x6A**. * **Microphone →** Includes **MICD** and **MICC** pins. **MICD** is used for bidirectional data transfer, while **MICC** is used as the clock synchronization input pin. ## Capacitive Sensing Pins * **T0 – T5 →** Input pins used for capacitive sensing. They are also connected respectively to **A4, A5, D15, D14, D13,** and **D12** pins and can be used as digital input/output pins. **D8, D9, D10,** and **D11** pins can also be used as capacitive sensing pins. ## RGB Pins * **LEDR →** Pin to which the internal red LED is connected. It is also connected to the **RX** line and is used as a status LED during serial port data communication. * **LEDG →** Pin to which the internal green LED is connected. It is also connected to the **TX** line and is used as a status LED during serial port data communication. * **LEDB →** Pin to which the internal blue LED is connected. It is also connected to the **SDA** line and is used as a status LED during I2C data communication. ## Button Pin * **GPKEY →** Pin to which the general-purpose internal button is connected. It is also used to put the system into manual upload mode. It is held at **logic “1” (3.3 V)** by a 10 kΩ pull-up resistor. It is also connected to the **D8** pin and can be used as a digital input/output pin. ## Programming Pins * **EN →** This pin must be held at **logic “1” (3.3 V)** to enable operation of the ESP32-WROVER-E module. 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” (0 V)**. * **BOOT →** Used to put