Overview:

• The ESP-WROVER-KIT is a development board built around the ESP32 and produced by Espressif.
  
• This board is compatible with multiple ESP32 modules, including the ESP32-WROOM-32, ESP32-WROVER and ESP32-WROVER-B.
  
• The ESP-WROVER-KIT features support for an LCD and a MicroSD card. The I/O pins have been broken out from the ESP32 module for easy extension.
  
• The board carries an advanced multi-protocol USB bridge (the FTDI FT2232HL), enabling developers to use JTAG directly to debug the ESP32 through the USB interface.
  
• The development board makes secondary development easy and cost-effective.

Parameters:

Block Diagram:

Board Layout Front:

Board Layout Back:

• 32.768 kHz

An external precision 32.768 kHz crystal oscillator provides a low-power consumption clock used during Deep-Sleep mode.

• FT2232

The FT2232 chip is a multi-protocol USB-to-serial bridge. Users can control and program the FT2232 chip through the USB interface to establish communication with ESP32.

• ESP32-WROVER-B

This version of ESP-WROVER-KIT board has ESP-WROVER-B module installed that integrates 64-Mbit PSRAM for flexible extended storage and data processing capabilities.

• Diagnostic LEDs

Four red LEDs connected to GPIO pins of the FT2232 chip. Intended for future use.

• UART Serial port:

The serial TX/RX signals on the FT2232HL and the ESP32 are broken out to each side of JP2.

• SPI

SPI interface used by ESP32 to access flash and PSRAM memories inside the module.

• CTS/RTS

Serial port flow control signals: the pins are not connected to the circuitry by default. To enable them, respective pins of JP14 must be shorted with jumpers.

• JTAG

JTAG interface: the JTAG signals on FT2232HL and ESP32 are broken out to the two sides of JP2. By default, the two signals are disconnected.

• USB Port

USB interface. It functions as the power supply for the board and the communication interface between PC and ESP32 module.

• EN Button

Reset button: pressing this button resets the system.

• Boot Button

Download button: holding down the Boot button and pressing the EN button initiates the firmware download mode. Then user can download firmware through the serial port.

• Power Switch

Power on/off button: toggling to the right powers the board on; toggling to the led & powers the board off.

• Power Selector

Power supply seleclection interface: the ESP-WROVER-KIT can be powered through the USB interface or the 5V Input interface.

• 5V Input

The 5V power supply interface is used as a backup power supply in case of fullload operation.

• 5V Power On LED

This red LED indicates that a power supply (either from USB or 5V Input) is applied to the board.

• LDO

NCP1117(1A). 5V-to-3.3V LDO.

• Camera Connector

Camera interface: a standard OV7670 camera module is supported.

• RGB LED

Red, green and blue (RGB) light emitting diodes (LEDs), which may be controlled by pulse width modulation (PWM).

• I/O Connector

All the pins on the ESP32 module are led out to the pin headers on the ESPWROVER-KIT. Users can program ESP32 to enable multiple functions such as PWM, ADC, DAC, I2C, I2S, SPI, etc.

• Micro SD Card Slot

Develop applications that access Micro SD card for data storage and retrieval.

• LCD

ESP-WROVER-KIT supports mountung and interfacing a 3.2” SPI (standard 4-wire Serial Peripheral Interface) LCD.

References:

• ESP32 Datasheet
  
• ESP32-WROVER-B 
• File Schematic