Revision as of 14:04, 28 June 2025

Product Picture

E32R28T-TopView
E32R28T-BottomView

E32N28T-TopView
E32N28T--BottomView

Product features

Equipped with ESP32-S3, convenient for development and with sufficient development resources
2.8-inch color screen with a resolution of240x320, supporting up to 262K colors (RGB666), offering a rich display of colors
Rich interfaces for easy to various peripherals (IIC, UART, etc.)
Supports external speakers for audio playback
Equipped with a microphone for receiving audio
Equipped with RGB threecolor indicator lights for a rich display of status
Equipped with a capacitive touch screen for convenient human-machine interaction
Standard TYPE-C interface for convenient program downloading and power
Equipped with a micro TF card slot for easy storage expansion
Supports external lithium batteries for portability
Equipped with a battery charging management circuit to ensure safe battery charging discharging
Provides a rich set of example programs for easy learning
Provides technical support for low-level drivers, and WIKI materials are updated online
The module undergone aging tests and multiple inspections to meet military-grade standards, ensuring stable and long-term operation

Product parameters

ESP32 parameters

Item	参数
Module	ESP32-S3
CPU	Xtensa LX7 32-bit dual-core processor
Clock rate	240MHz（MAX）
Memory	384 KB ROM+512KB SRAM+16 KB RTC SRAM+16MBQSPI Flash
WIFI	2.4GHz band supports 20 MHz and 40MHz channel width
Bluetooth	Bluetooth V4.2 BR/EDR and Bluetooth LE standard
Operation voltage	3.0~3.6(V)
Operation Temperature	–40~85(℃)

Screen parameters

Item	parameters
Screen Size	2.8 inch
Screen Type	IPS TFT
Screen resolution	240xRGBx320(pixels)
Active Area	43.20(W)x57.60(H)(mm)
Number of pixels	MAX：262K(RGB666) TYP：65K(RGB565)
Drive IC	ILI9341V
Screen interface	4-Line SPI
pixels size	0.153(H)x0.153(mm)
View Angle	ALL 0’CLOCK
Luminance(TYP)	220 cd/m²
Backlight Type	White LED*4
Operation Temperature	-30~80(℃)
Storage Temperature	-30~80(℃)

Touch screen parameters

Item	parameters
Effective area size	2.8 inch
Touch screen type	Capacitive touch screen
Valid Area	240x320(pixels)
Drive IC	XPT2046
Visual Area	45.20(W)x59.45(H)(mm)
interface	SPI
Operation Temperature	-30~80(℃)
Storage Temperature	-30~80(℃)

Size parameters

Item	parameters
LCD screen size	50.00±0.2(W)x69.20±0.2(H)x2.3±0.1(D) (Not including the registration and back glue)
Touch screen size	50.00±0.2(W)x69.20±0.2(H)x1.20 (D) ±0.1(D) (Not including the registration and back glue)
Product size	Touch screen：50.00(W)x86.00(H)x10.60(D) No Touch screen：50.00(W)x86.00(H)x9.10(D)

Battery charging parameters

Item	parameters
Charging voltage	范围：4.2~6.5(V) 典型值：5V
Charging current	最大值：500mA 模块实际值：mA
Charging saturation voltage	4.24V
Charging temperature	模块实际最大值：62℃
Charging battery specifications	3.7V聚合锂电池

Electrical parameters

Item	parameters
Operation Temperature	5.0V
Backlight current	mA
Total current	ESP32复位：只有显示屏工作：mA 显示屏、喇叭、电池充电都工作：mA
Power	（只有显示屏工作）

Other parameters

Item	parameters
SKU	Touch screen：E32C28P No Touch screen：E32N28P
Power interface	TYPE-C
Weight	E32R28T: E32N28T:

Product interface

接口功能说明

接口	功能说明
ESP32-S3	Main control of the display module, controlling on-board and external peripherals
MicroSD Interface	Insert a Micro SD card to expand the storage space, such as storing font library, pictures, audio files and other large data content.
RGB	LED lights with red, green, and blue colors, controlled by a single IO port.
Uart	1.25mm 4P socket. 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 to 3.7V polymer lithium battery, charge the battery through the battery charging management circuit, also used for battery power supply. Note the positive and negative terminals of the interface
BOOT key	For entering the download mode or key test. Press and hold this key to power up, then release to enter the download mode, or after powering up, and hold this key, then press the RESET key, release the RESET key and then release this key, you can also enter the download mode. When it is not necessary enter the download mode, this key can be used as a normal key.
TYPE-C interface	For module power and program downloading. This interface is connected to the one-key download circuit on the module, which can realize automatic entry into the download mode (without the BOOT key).
RESET key	For ESP32S3 main control and LCD reset, press to reset the level.
Expand pin	1.25mm 4P socket. Pins GPIO2/3/14/21 are brought out
Horn interface	1.25mm 2P socket. For connecting to speaker to play audio. For connecting to speaker to play audio (max 1.5W(Ω) or 2W (4Ω) speaker).
IIC interface	1.25mm 4P socket. For external SPI communication device, this SPI interface and MicroSD share. Can be used as ordinary IO1.25mm 4P socket. For external IIC communication device, this IIC interface and capacitive touch screen share. Can be used as ordinary.

ESP32引脚分配

板载设备	ESP32连接引脚	板载设备引脚说明
液晶屏	IO10	液晶屏片选控制信号，低电平有效
	IO46	液晶屏命令/数据选择控制信号高电平：数据，低电平：命令
	IO12	液晶屏SPI总线时钟信号
	IO11	液晶屏SPI总线写数据信号
	IO13	液晶屏SPI总线读数据信号
	EN	液晶屏复位控制信号，低电平复位（和ESP32-32E主控共用复位引脚）
	IO45	液晶屏背光控制信号（高电平点亮背光，低电平关闭背光）
电容触摸屏	IO16	电容触摸屏I2C总线数据信号
	IO15	电容触摸屏I2C总线时钟信号
	IO18	电容触摸屏复位控制信号，低电平复位
	IO17	电容触摸屏中断输入信号，发生触摸事件时，输入低电平
RGB三色灯	IO42	单线RGB三色LED灯，可以根据不同信号分别控制内部的红绿蓝三种灯珠
MicroSD 卡	IO38	SD卡SDIO总线时钟信号
	IO40	SD卡SDIO总线命令信号
	IO39/41/48/47	SD卡SDIO总线数据信号（DATA0~DATA3四根数据线）
音频	IO1	音频使能信号，低电平使能，高电平禁止
	IO4	音频I2S总线主时钟信号
	IO5	音频I2S总线位时钟信号
	IO6	音频I2S总线位输出数据信号
	IO7	音频I2S总线左右声道选择信号。高电平：右声道；低电平：左声道
	IO8	音频I2S总线位输入数据信号
按键	IO0	下载模式选择按键（按住该按键上电，然后松开就会进入下载模式）
按键	EN	ESP32-S3复位按键，低电平复位（和液晶屏复位共用）
串口	RXD0(IO43)	ESP32-S3串口接收信号（如果不使用串口，可做普通IO使用）
串口	TXD0(IO44)	ESP32-S3串口发送信号（如果不使用串口，可做普通IO使用）
电池	IO9	电池电压ADC值获取信号（输入）
拓展接口	IO2	可做普通IO使用
	IO3	可做普通IO使用
	IO14	可做普通IO使用
	IO21	可做普通IO使用
IIC外设扩展接口	IO16	I2C总线数据信号
IIC外设扩展接口	IO15	I2C总线时钟信号