Overview:

• ESP32-PICO-KIT is an ESP32-based mini development board produced by Espressif.
• The core of this board is ESP32-PICO-D4 - a System-in-Package (SiP) module with complete Wi-Fi and Bluetooth functionalities. Compared to other ESP32 modules, ESP32-PICO-D4 integrates the following peripheral components in one single package, which otherwise would need to be installed separately:
  • 40 MHz crystal oscillator
  • 4 MB flash
  • Filter capacitors
  • RF matching links

• All the IO signals and system power on ESP32-PICO-D4 are led out to two rows of 20 x 0.1” header pads on both sides of the development board for easy access. For compatibility with Dupont wires, 2 x 17 header pads are populated with two rows of male pin headers. The remaining 2 x 3 header pads beside the antenna are not populated. These pads may be populated later by the user if required.

Parameters:

The block diagram below shows the main components of ESP32-PICO-KIT and their interconnections:

Board Dimentions - Back:

Board Dimentions - Side:

Board Layout :

• ESP32-PICO-D4

Standard ESP32-PICO-D4 module soldered to the ESP32-PICO-KIT board. The complete system of the ESP32 chip has been integrated into the SiP module, requiring only external antenna with LC matching network, decoupling capacitors and pull-up resistors for EN signals to function properly.

• LDO

5V-to-3.3V Low dropout voltage regulator (LDO).

• USB-UART

Bridge A single chip USB-UART bridge: CP2102 in V4 of the board and CP2102N in V4.1. The first provides up to 1 Mbps transfer rates, while the latter up to 3 Mbps transfers rates.

• Micro USB Port

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

• Power On LED

Turns on when the power supply is applied to the board. For details see schematic in Related Documents.

• I/O

All the pins on ESP32-PICO-D4 are broken out to the female pin headers on the board.

• BOOT 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.

• EN Button

Reset button: pressing this button resets the system.

Related Documents:

• ESP32 Datasheet
  
• ESP32-PICO-D4
• Board v4 schematic
• Board v4.1 schematic