ESP32-PICO-KIT is an ESP32-based mini development board produced by Espressif.
This is a genuine, high quality module manufactured 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
- This setup reduces the costs of additional external components as well as the cost of assembly and testing and also increases the overall usability of the product.
The development board features a USB-UART Bridge circuit which allows developers to connect the board to a computer’s USB port for flashing and debugging.
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.
Power Supply Options
There are three mutually exclusive ways to provide power to the board:
- Micro USB port, default power supply
- 5V / GND header pins
- 3V3 / GND header pins
!!! WARNING !!!
The power supply must be provided using one and only one of the options above, otherwise the board and/or the power supply source can be damaged.
The two tables below provide the Name and Function of I/O header pins on both sides of the board, see ESP32-PICO-KIT board layout. The pin numbering and header names are the same as in the schematic given in Related Documents.
GPIO8, SD_DATA1, SPID, HS1_DATA1 (See 1), U2CTS
GPIO7, SD_DATA0, SPIQ, HS1_DATA0 (See 1), U2RTS
GPIO6, SD_CLK, SPICLK, HS1_CLK (See 1), U1CTS
GPIO21, VSPIHD, EMAC_TX_EN
GPIO22, VSPIWP, U0RTS, EMAC_TXD1
GPIO19, VSPIQ, U0CTS, EMAC_TXD0
GPIO23, VSPID, HS1_STROBE
GPIO18, VSPICLK, HS1_DATA7
GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK
GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD
GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD
GPIO3, U0RXD (See 3), CLK_OUT2
GPIO1, U0TXD (See 3), CLK_OUT3, EMAC_RXD2
GPIO38, ADC1_CH2, RTC_GPIO2
GPIO37, ADC1_CH1, RTC_GPIO1
3.3V power supply
GPIO16, HS1_DATA4 (See 1), U2RXD, EMAC_CLK_OUT
GPIO17, HS1_DATA5 (See 1), U2TXD, EMAC_CLK_OUT_180
GPIO11, SD_CMD, SPICS0, HS1_CMD (See 1), U1RTS
GPIO36, ADC1_CH0, RTC_GPIO0
GPIO39, ADC1_CH3, RTC_GPIO3
GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0
GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1
32K_XP (See 2a), ADC1_CH4, TOUCH9, RTC_GPIO9
32K_XN (See 2b), ADC1_CH5, TOUCH8, RTC_GPIO8
GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17
ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK,
HS2_CLK, SD_CLK, EMAC_TXD2
ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI (See 4), HSPIQ,
HS2_DATA2, SD_DATA2, EMAC_TXD3
ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID,
HS2_DATA3, SD_DATA3, EMAC_RX_ER
ADC2_CH3, TOUCH3, RTC_GPIO13, MTDO, HSPICS0
HS2_CMD, SD_CMD, EMAC_RXD3
ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP,
ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD,
HS2_DATA1, SD_DATA1, EMAC_TX_ER
ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1
3.3V power supply
5V power supply
The following notes give more information about the items in the tables above.
- This pin is connected to the flash pin of ESP32-PICO-D4.
- 32.768 kHz crystal oscillator: a) input b) output
- This pin is connected to the pin of the USB bridge chip on the board.
- The operating voltage of ESP32-PICO-KIT’s embedded SPI flash is 3.3V. Therefore, the strapping pin MTDI should hold bit zero during the module power-on reset. If connected, please make sure that this pin is not held up on reset.
For additional information, see the manufacturer’s product page.product page:
For the Circuit Schematic in PDF format, click here.see this page:
1 x ESP32-PICO-KIT module