ESP32-P4-WIFI6-Touch-LCD-4B

Onboard camera interface

Onboard Ethernet port + RS485 + 2-ch relay

This series is a high-performance development board based on the ESP32-P4 chip. This series adopts a dual-core plus single-core RISC-V architecture design, featuring a built-in 4inch 720 × 720 resolution IPS touch display. It supports rich human-machine interaction interfaces, including MIPI-CSI with an integrated image signal processor (ISP), and USB OTG 2.0 HS port for high-speed connections. The ESP32-P4 chip integrates a digital signature peripheral and a dedicated key management unit to ensure data and operational security. It is designed for high performance and high security applications, and fully meets the higher requirements of embedded applications for human-computer interface support, edge computing capabilities and IO connection features.

SKU	Product
31416	ESP32-P4-WIFI6-Touch-LCD-4B
31570	ESP32-P4-86-Panel-ETH-2RO

Features

• Processor
  • Equipped with a RISC-V 32-bit dual-core processor (HP system), featuring DSP and ISA extensions, a Floating-Point Unit (FPU), with a main frequency of up to 360 MHz.
  • Equipped with a RISC-V 32-bit single-core processor (LP system), with a main frequency of up to 40 MHz.
  • Equipped with an ESP32-C6 WIFI/BT co-processor, expanding WIFI 6/Bluetooth 5 and other functions through SDIO
• Memory
  • 128 KB of high-performance (HP) system read-only memory (ROM).
  • 16 KB of low-power (LP) system read-only memory (ROM).
  • 768 KB of high-performance (HP) L2 memory (L2MEM).
  • 32 KB of low-power (LP) SRAM.
  • 8 KB of system tightly coupled memory (TCM).
  • 32 MB PSRAM stacked in the package, plus 32 MB Nor Flash externally
• Peripheral Interfaces
  • Onboard interfaces include MIPI-CSI, MIPI-DSI, USB 2.0 OTG, Ethernet, SDIO 3.0 TF card slot, dual microphones with echo cancellation, speaker terminal, RTC battery terminal, etc. (different products expose different subsets; refer to the resource introduction)

Hardware Version Comparison

ESP32-P4-WIFI6-Touch-LCD-4B

This version is fitted with the 15-pin MIPI CSI camera connector.

ESP32-P4-86-Panel-ETH-2RO

The main PCB does not have the MIPI CSI camera connector fitted. It connects to the 86 Panel Bottom Board, which provides the RJ45 Ethernet port, RS485 interface, and two relays.

The two versions use different main-PCB assemblies and enclosure structures. They cannot share the same 86-type back box.

Onboard Resources

1. ESP32-P4-Core Integrates ESP32-P4NRW32 and 32 MB Nor Flash
2. ESP32-C6-MINI-1U-H8 Module SDIO interface protocol, expands the development board with Wi-Fi 6, Bluetooth 5 (LE)
3. 2.54 mm 4-pin Pads For flashing firmware to the ESP32-C6 module
4. MIPI DSI LCD Interface For connecting the MIPI 4-inch screen
5. RTC Battery Header For connecting a rechargeable RTC battery (only supports rechargeable RTC batteries)
6. Onboard Microphone Microphone input and echo cancellation
7. BOOT Button Press during power-up or reset to enter download mode
8. Expansion Header (2.0 mm pitch) Can be used to connect the 86 Panel Bottom Board or external I/O
9. RESET Button
10. PWR LED Indicator Power indicator
11. Type-C Interface (USB OTG) USB OTG 2.0 High Speed interface
12. Type-C Interface (USB TO UART) For power supply, programming, and debugging
13. ES7210 Audio ADC Works with the onboard acoustic echo cancellation circuit for microphone input
14. IP101 10/100M Ethernet PHY
15. ES8311 Low-Power Audio Codec Chip For audio encoding and decoding
16. MIPI CSI Interface 15-pin, 1.0 mm pitch, supports 2-lane MIPI CSI cameras (only available on the ESP32-P4-WIFI6-Touch-LCD-4B version)
17. Speaker Header MX1.25 2P connector, supports an 8 Ω, 2 W speaker
18. TF Card Slot SDIO 3.0 interface protocol
19. 100M RJ45 Ethernet Port
20. Relay Indicators
21. Power isolation module
22. Digital isolator
23. Optocoupler isolation
24. Relay
25. Relay screw terminal 5.08 mm 4-pin
26. RS485 screw terminal
27. Power screw terminal DC 6-30 V wide-range input

Peripheral Quick Reference

The assignments below are taken from the main-board and 86 Panel Bottom Board schematics linked on the Resources page.

Module	Device / Function	Interface	GPIO / Signal	Availability
LCD	4-inch 720 x 720 IPS display	2-lane MIPI DSI	RESET=GPIO27, BL_EN=GPIO33, BL_PWM=GPIO26	Both versions
Touch	GT911 5-point capacitive touch	I2C	SDA=GPIO7, SCL=GPIO8, RST=GPIO23; TP_INT is routed to test point TP2	Both versions
Camera	15-pin, 1.0 mm pitch camera connector	2-lane MIPI CSI + I2C	Dedicated CSI lanes; control bus uses GPIO7/GPIO8	ESP32-P4-WIFI6-Touch-LCD-4B only
Wireless	ESP32-C6-MINI-1U-H8	SDIO / control	GPIO6, GPIO14, GPIO16, GPIO18-GPIO20, GPIO22, GPIO54	Both versions
MicroSD	TF card slot	4-bit SDIO	D0-D3=GPIO39-GPIO42, CLK=GPIO43, CMD=GPIO44, power control=GPIO45	Both versions
Audio output	ES8311 codec + NS4150B amplifier	I2C + I2S	I2C=GPIO7/GPIO8; I2S=GPIO9-GPIO13; amplifier control=GPIO53	Both versions
Audio input	ES7210 dual-microphone ADC	I2C + I2S/TDM	I2C address 0x40; data and clocks use GPIO10-GPIO13	Both versions
Ethernet PHY	IP101	RMII	GPIO28-GPIO31, GPIO34/GPIO35, GPIO49-GPIO52	PHY on both; RJ45 on ESP32-P4-86-Panel-ETH-2RO only
RS485	THVD1406DR / SP3485EEN transceiver	UART, automatic direction control	TXD=GPIO47, RXD=GPIO48	ESP32-P4-86-Panel-ETH-2RO only
Relays	Two optocoupler-isolated relay channels	GPIO	RELAY1=GPIO32, RELAY2=GPIO46	ESP32-P4-86-Panel-ETH-2RO only
USB OTG	ESP32-P4 native USB 2.0 HS	USB	Dedicated USBD_P/USBD_N pins	Both versions
USB to UART	CH343P	UART	GPIO37/GPIO38; DTR/RTS also drive the reset/download circuit	Both versions

Pin Definition

General Expansion Header (P3)

Pin	Signal	Pin	Signal
1	3V3	2	5V
3	GPIO7 / I2C_SDA	4	GND
5	GPIO8 / I2C_SCL	6	GPIO37
7	GPIO2	8	GPIO38
9	GPIO3	10	GPIO20
11	GPIO4	12	GPIO21
13	GPIO5	14	GPIO22

Bottom Board Header (P2)

The P2 header carries Ethernet pairs and control signals between the main PCB and the 86 Panel Bottom Board.

Pin	Signal	Pin	Signal
1	ETH_TX_P / TD_P	2	5V
3	ETH_TX_N / TD_N	4	3V3
5	ETH_RX_P / RD_P	6	GPIO32 / RELAY1
7	ETH_RX_N / RD_N	8	GPIO46 / RELAY2
9	USB_IN1_P	10	GPIO47 / RS485_TXD
11	USB_IN1_N	12	GPIO48 / RS485_RXD
13	GND	14	GND

GPIO Allocation

GPIO	Signal / Connected Device	Notes
GPIO2-GPIO5	P3 expansion header	General-purpose expansion pins
GPIO6	ESP32-C6 IO2	Wireless coprocessor interface
GPIO7	Shared I2C SDA	Touch, camera control, ES8311, and ES7210; also exposed on P3
GPIO8	Shared I2C SCL	Touch, camera control, ES8311, and ES7210; also exposed on P3
GPIO9	ES8311 DSDIN	Audio playback data
GPIO10	ES8311 LRCK / ES7210 SDOUT1	Shared audio interface
GPIO11	ES7210 SDOUT2	Microphone ADC data
GPIO12	ES8311 ASDOUT / ES7210 LRCK	Shared audio interface
GPIO13	ES8311 / ES7210 SCLK	Audio bit clock
GPIO14	ESP32-C6 IO23	Wireless coprocessor interface
GPIO16	ESP32-C6 IO22	Wireless coprocessor interface
GPIO18	ESP32-C6 IO21	Wireless coprocessor interface
GPIO19	ESP32-C6 IO20	Wireless coprocessor interface
GPIO20	ESP32-C6 IO19 / P3	Shared with the expansion header
GPIO21	P3 expansion header	General-purpose expansion pin
GPIO22	ESP32-C6 IO9 / P3	Shared with the expansion header
GPIO23	TP_RST	GT911 touch reset
GPIO24/GPIO25	USB_IN1_P/USB_IN1_N	Routed to P2 through unpopulated series resistors
GPIO26	LCD_BL_PWM	LCD backlight brightness control
GPIO27	LCD_RESET	LCD reset
GPIO28	IP101 CRS_DV/RX_DV	RMII
GPIO29	IP101 RXD0	RMII
GPIO30	IP101 RXD1	RMII
GPIO31	IP101 MDC	RMII management clock
GPIO32	RELAY1	P2; used by the 86 Panel Bottom Board
GPIO33	BL_EN	LCD backlight boost enable
GPIO34	IP101 TXD0	RMII
GPIO35	IP101 TXD1 / BOOT button	Shared through the download-mode circuit
GPIO37/GPIO38	CH343P UART / P3	Programming and debugging serial port, also exposed on P3
GPIO39-GPIO42	MicroSD D0-D3	4-bit SDIO data bus
GPIO43	MicroSD CLK	SDIO clock
GPIO44	MicroSD CMD	SDIO command
GPIO45	MicroSD power control	Controls SD1_VDD
GPIO46	RELAY2	P2; used by the 86 Panel Bottom Board
GPIO47/GPIO48	RS485 TXD/RXD	P2; used by the 86 Panel Bottom Board
GPIO49	IP101 TXEN	RMII transmit enable
GPIO50	IP101 REF_CLK	RMII reference clock
GPIO51	IP101 RESET	Ethernet PHY reset
GPIO52	IP101 MDIO	RMII management data
GPIO53	PA_CTRL	NS4150B speaker amplifier control
GPIO54	ESP32-C6 CHIP_PU	Wireless coprocessor reset / enable

Usage Notes

• GPIO7/GPIO8 are shared by the onboard I2C devices and the P3 header. Check for address conflicts before adding another I2C device.
• GPIO20, GPIO22, GPIO37, and GPIO38 are exposed on P3 but are already connected to onboard functions.
• GPIO32, GPIO46, GPIO47, and GPIO48 become relay and RS485 signals when the 86 Panel Bottom Board is connected.
• TP_INT is available at test point TP2 and is not connected to an ESP32-P4 GPIO in the referenced schematic.

Dimensions

Development Tools

Arduino generally offers a gentler learning curve and may be more approachable for beginners and hobbyists. ESP-IDF provides advanced tooling and finer control over system behavior, making it better suited to complex projects and applications with demanding performance requirements.

warning

Due to the limited support for ESP32-P4 on the Arduino platform, ESP-IDF is currently recommended for development.

• ESP-IDF, short for Espressif IoT Development Framework, is a development framework provided by Espressif for the ESP series chips. It is developed using the C language, including a compiler, debugger, and flashing tool, etc., and can be developed via the command lines or through an integrated development environment (such as Visual Studio Code with the Espressif IDF plugin). The plugin offers features such as code navigation, project management, and debugging, etc. We recommend using VS Code for development. For the specific configuration process, please refer to the Working with ESP-IDF. The tutorial also provides relevant example programs for reference.