Product Images

E32R40T-TopView
E32R40T-BottomView

E32N35T-TopView
E32N40T--BottomView

Product Introduction

Comes with an ESP32-32E module, facilitating development and providing ample development resources.
3.95/4.0-inch color screen with a resolution of 320x480, supporting up to 262K colors (RGB666), offering rich color display.
Abundant interfaces, making it convenient to connect various peripherals (such as I2C, SPI, UART and other peripherals).
Supports external speakers for audio playback.
Equipped with an RGB tricolor indicator light, providing diverse status indications.
Comes with a resistive touch screen, enabling convenient human-computer interaction.
Standard TYPE-C interface, enabling easy program downloading and power supply.
Has a micro TF card slot for easy storage expansion.
Supports external lithium batteries, being lightweight and portable.
Features a battery charging management circuit to ensure the safe charging and discharging of the battery.
Provides a wealth of example programs, making it easy to learn.
Offers underlying driver technical support, and WIKI materials are updated online.
The module has passed multiple aging tests and can meet military-grade standards, ensuring long-term stable operation.

Product Parameters

ESP32 Main Control Parameters

Name	Parameters
Module	ESP32-32E
CPU	ESP32-D0WD-V3, Xtensa dual-core 32-bit LX6 microprocessor
Main Frequency	240MHz (maximum)
Storage	448KB ROM + 520KB SRAM + 16KB RTC SRAM + 4MB external QSPI Flash
WIFI	2.4GHz, 802.11b/g/n mode
Bluetooth	Bluetooth V4.2 BR/EDR and Bluetooth LE standards
Operating Voltage	3.0~3.6(V)
Operating Temperature	–40~85(℃)

Liquid Crystal Screen Parameters

Name	Parameters
Screen Size	3.95/4.0 inch
Screen Type	TN TFT
Resolution	320xRGBx480(pixels)
Effective Display Area	55.68(W)x83.52(H)(mm)
Number of Colors	Maximum: 262K(RGB666) Commonly used: 65K(RGB565)
Driver IC	ST7796S
Display Interface	4-Line SPI(connected to ESP32)
Pixel Size	0.174(H)x0.174(mm)
Viewing Angle	12 0’CLOCK
Backlight Brightness (Typical Value)	450cd/m²
Backlight Type	White LED*8
Operating Temperature	-10~50(℃)
Storage Temperature	-20~60(℃)

Touch Screen Parameters

Name	Parameters
Effective Area Size	3.95 inch
Touch Screen Type	Resistive touch screen
Driver IC	XPT2046
Effective Touch Area	56.28(W)x84.32(H)(mm)
Visible Window Size	56.88(W)x85.22(H)(mm)
Communication Interface	SPI
Structural Material	ITO film + ITO glass
Operating Temperature	-10~60(℃)
Storage Temperature	-20~70(℃)

Size Parameters

Name	Parameters
Liquid Crystal Screen Outline Dimensions	60.88±0.2(W)x94.57±0.2(H)x2.5±0.1(D)(mm)(excluding the cable and back adhesive)
Touch Screen Outline Dimensions	60.48±0.2(W)x93.87±0.2(H)x1.05±0.1(D)(mm)(excluding the cable and back adhesive)
Module Outline Dimensions	With touch screen: 60.88(W)x111.11(H)x5.65(D)(mm) Without touch screen: 60.88(W)x111.11(H)x4.60(D)(mm)

Battery Charging Parameters

Name	Parameters
Charging Voltage	Range: 4.2~6.5(V) Typical value: 5V
Charging Current	Maximum value: 500mA Module actual value: 290mA
Charging Saturation Voltage	4.24V
Charging Temperature	Module actual maximum value: 62℃
Charging Battery Specifications	3.7V polymer lithium battery

Electrical Parameters

Name	Parameters
Operating Voltage	5.0V
Backlight Current	142mA
Total Current	When ESP32 is reset: 40mA When only the display screen is working: 230mA When the display screen, speaker, and battery charging are all working: 580mA
Power Consumption	1.15W (when only the display screen is working)
Backlight Brightness (Actual Value)	With touch screen: 370 cd/m² Without touch screen: 472 cd/m²
Supported Speaker Power Consumption (Maximum)	1.5W(8Ω) or 2W(4Ω)

Basic Parameters

Name	Parameters
SKU	With touch screen: E32R40T Without touch screen: E32N40T
Power Supply Interface	TYPE-C
Weight (Including Packaging)	E32R40T: 130 g E32N40T: 119 g

Interface Definition

Interface Function Description

Interface	Function Description
ESP32-32E Module	The main control of the display module, which controls on-board peripherals and external peripherals.
MicroSD Card Slot	Insert a Micro SD card to expand the storage space, for example, to store large data such as font libraries, pictures, and audio files.
RGB Tricolor Light	Includes red, green, and blue LED lights, and each light can be controlled by an IO pin to indicate the status.
Serial Port	1.25mm 4P socket. It can be used for serial port debugging, downloading, and communication. An external USB-to-serial port module is required.
Battery Interface	1.25mm 2P socket, used to connect a 3.7V polymer lithium battery. The battery is charged through the battery charging management circuit and can also be used for battery power supply. Pay attention to the positive and negative poles of the interface.
BOOT Button	Used to enter the download mode or conduct button testing. Press and hold this button while powering on, then release it to enter the download mode. Or after powering on, press and hold this button, then press the RESET button, release the RESET button, and then release this button to enter the download mode. When there is no need to enter the download mode, this button can be used as a regular button.
TYPE-C Interface	Used for module power supply and program downloading. This interface is connected to the one-click download circuit on the module, allowing it to automatically enter the download mode (no need to press the BOOT button).
RESET Button	Used to reset the ESP32 main control and the LCD. Press it for level reset.
Expansion Input Pins	1.25mm 2P socket. IO35 and IO39 are two IO pins with only input functions, used to connect input signals.
Speaker Interface	1.25mm 2P socket. Used to connect a speaker for audio playback.
SPI Peripheral Interface	1.25mm 4P socket. Used to connect external SPI communication devices. This SPI interface is shared with the MicroSD. It can be used as a normal IO.
I2C Peripheral Interface	1.25mm 4P socket. Used to connect external IIC communication devices. It can be used as a normal IO.